CN104335750A - Use of slow-release urea fertilizer in rice seedling raising - Google Patents
Use of slow-release urea fertilizer in rice seedling raising Download PDFInfo
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Abstract
The invention relates to use of a slow-release urea fertilizer in rice seedling raising. A slow-release urea fertilizer is evenly added to conventional rice seedling bed soil according to the amount of 200-800g/m<2>. According to the slow-release urea fertilizer, the problems that rice seedlings are burnt due to over-high fertility, and are weak due to over-low fertility are radically resolved; nitrogen loss of a seedbed in a fertilization process is effectively overcome; the utilization efficiency of the fertilizer is improved; dressing of a striking root fertilizer is avoided; a user can evenly mix the fertilizer with the seedling bed soil according to the specific nitrogen fertilizer amount of the seedbed. Therefore, the method is suitable for all rice seedbed seedlings, and is wide in application prospect.
Description
[technical field]
The invention belongs to arviculture technology.More specifically, the present invention relates to the purposes of a kind of slow-release carbamide fertilizer in raising rice seedlings.
[background technology]
Seedling is first important step of Rice Production, the quality that rice shoot grows in nursery period, not only affects the organ such as root, leaf, tiller that normal differentiation is formed, and to turning green after shoot transplanting equipment, root of hair, to tiller and even spike number, grain number etc. have far-reaching influence.The problems such as the yellow seedling of paddy drought seedling ubiquity, dead seedling, main cause is as follows: soil nutrient deficiency causes the stiff seedling of physiological; The nutrient density too high fertilizer damage that causes in local burns seedling etc.Farmer's proverb has " the good half standing grain of seedling ", has absolutely proved the effect of strong seedling to volume increase.For allowing rice high yield, first will cultivate the strong sprout of sufficient amount, and paddy seedbed fertilising is the important measures of nurturing staff.
Urea is that China uses the most at present, the chemical nitrogen fertilizer that consumption is maximum.Impose on seedbed using urea as instant nitrogenousfertilizer prior to seeding, after easily causing seed germination, radicle is burnt, and causes seedling to have bud unrooted, withered in flakes; If apply fertilizer irregular after neat seedling or consumption is excessive, easily cause rice seedlings growing way uneven or burn seedling; If spread fertilizer over the fields fertilizer after neat seedling and spray clear water drip washing not in time and easily cause rice shoot in flakes or in banded dead.Therefore, be not suitable for when paddy seedbed fertilising at present spreading dry for urea, must be watered to sprinkle and execute; Also having because the length of time rice seedlings grow is short, does not topdress in seedbed, only rice shoot de-fertile time spray 1% urea liquid, often dish 1 gram, urea, by 1:100 be watered mix thoroughly after evenly spray in the dusk time-division.In a word, seedbed use urea very careful.At present, rice dry nursery seedling has and adds " seedling strengthen agent ", but the effect of the seedling when seedbed soil fertility is on the low side is unstable, can not ensure the quality of seedlings.
In order to solve these technological deficiencies existed in current raising rice seedlings, the present inventor, on the basis of summing up prior art, completes the present invention finally through lot of experiments research.
[summary of the invention]
[technical problem that will solve]
The object of this invention is to provide the purposes of a kind of slow-release carbamide fertilizer in raising rice seedlings.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention relates to the purposes of a kind of slow-release carbamide fertilizer in raising rice seedlings.In conventional paddy seedbed soil, evenly slow-release carbamide fertilizer is added according to 200-800 gram/m.
A preferred embodiment of the invention, described slow-release carbamide fertilizer is selected from inorganic matter coated slow-release urea fertilizer, organic matter coated slow-release urea fertilizer, polymer capsule slow-release carbamide fertilizer or chemosynthesis slow release fertilizer.
According to another kind of preferred embodiment of the present invention, the release period of described slow-release carbamide fertilizer is 60 ~ 180 days.
According to another kind of preferred embodiment of the present invention, the release period of described slow-release carbamide fertilizer is 100 ~ 140 days.
According to another kind of preferred embodiment of the present invention, the granularity of described slow-release carbamide fertilizer is 1.0 ~ 4.75mm.
According to another kind of preferred embodiment of the present invention, the addition of described slow-release carbamide fertilizer is 300-650 gram/m.
According to another kind of preferred embodiment of the present invention, described inorganic matter coated slow-release urea fertilizer is made up of according to weight ratio 1:5 ~ 9 inorganic matter coating layer and urea core; Described inorganic matter is selected from sulphur, calcium phosphate, talcum powder or magnesium ammonium phosphate.
According to another kind of preferred embodiment of the present invention, described organic matter coated slow-release urea fertilizer is made up of according to weight ratio 1:15 ~ 50 organic matter coating layer and urea core; Described organic matter is selected from polyurethane, paraffin or linseed oil.
According to another kind of preferred embodiment of the present invention, described polymer capsule slow-release carbamide fertilizer is made up of according to weight ratio 1:20 ~ 30 polymer capsule layer and urea core; Described polymer is selected from polyethylene, polypropylene or polybutene.
According to another kind of preferred embodiment of the present invention, described chemosynthesis slow release fertilizer is ureaformaldehyde, butylene pitches two ureas or oxamides, and wherein the content of urea is with described chemosynthesis slow release fertilizer total weight 30 ~ 38%.
In more detail the present invention will be described below.
The present invention relates to the purposes of a kind of slow-release carbamide fertilizer in raising rice seedlings.In conventional paddy seedbed soil, evenly slow-release carbamide fertilizer is added according to 200-800 gram/m.
By evenly admixing slow-release carbamide fertilizer in conventional seedbed soil preparation, throughout the growing season slowly providing nitrogen continually at rice shoot, both having ensured rice shoot robust growth, prevent again fertilizer to burn seedling.Can realize like this, by controlling liquid manure to control seedling growth, preventing excessive growth.Realize rice shoot root Bai Erwang, flat thin sturdy, seedling endure that leaf is green, the length of time rice seedlings grow suitably, evenly neat.And the slow-release carbamide fertilizer do not released during rice transplanting is with the rice transplanting of seedling soil, directly for rice shoot root system provides nutrient, exempts to impose striking root fertilizer, shorten transplanting seedling time.The method is easy and simple to handle, cost is low, and improves rice seedling quality, exempts to impose striking root fertilizer after realizing rice seedling rice transplanting.
According to the present invention, slow-release carbamide fertilizer should be appreciated that it is that contained nutrient form can delay fertilizer that is absorbed by crops and that utilize after application, and the fertilizer of to be contained nutrient than quick-acting fertilizer more flesh up as ammonium nitrate, urea, phosphorus ammonium, potassium chloride etc. have effect.
The slow-release carbamide fertilizer that the present invention uses is selected from inorganic matter coated slow-release urea fertilizer, organic matter coated slow-release urea fertilizer, polymer capsule slow-release carbamide fertilizer or chemosynthesis slow release fertilizer.
The release period of the slow-release carbamide fertilizer that the present invention uses should be appreciated that it is the time period of urea fertilizer Morphological Transitions for the available effective form of plant.The release period of slow-release carbamide fertilizer is extremely important for the growth of control rice seedling.
The release period of the slow-release carbamide fertilizer that the present invention uses is 60 ~ 180 days.For the present invention, if the release period of described slow-release carbamide fertilizer is shorter than 60 days, then can causes the quick release of fertilizer and cause burning seedling phenomenon; If the release period of described slow-release carbamide fertilizer is longer than 180 days, then seedling can be caused small and weak because fertilizer discharges deficiency, growing way is slow, affects the direct decline of rice transplanting and rice yield; Therefore, the release period of described slow-release carbamide fertilizer is 60 ~ 180 days is appropriate.
Preferably, the release period of described slow-release carbamide fertilizer is 100 ~ 140 days.
The granularity of the slow-release carbamide fertilizer that the present invention uses is 1.0 ~ 4.75mm.If this granularity exceedes its particle size range, its ill-effect is that the outside coating material of fertilizer can not wrap up fast, evenly, affects the release number of days of fertilizer.
In the present invention, the addition of described slow-release carbamide fertilizer should be appreciated that it is when conventional rice nursery, the amount of the slow-release carbamide fertilizer that every square metre of conventional rice seedbed soil uses.Reasonable employing slow-release carbamide fertilizer addition is the key of seedling cultivation of rice success or failure.
If the addition of described slow-release carbamide fertilizer is less than 200 grams/m, then seedling can be caused weak because Nitrogen releasing is very few; If the addition of described slow-release carbamide fertilizer is higher than 800 grams/m, then can causes because Nitrogen releasing is excessive and burn seedling phenomenon.Therefore, the addition of described slow-release carbamide fertilizer is 200-800 gram/m is rational.
Preferably, the addition of described slow-release carbamide fertilizer is 300-650 gram/m.
In the present invention, described inorganic matter coated slow-release urea fertilizer is made up of according to weight ratio 1:5 ~ 9 inorganic matter coating layer and urea core; Described inorganic matter is selected from sulphur, calcium phosphate, talcum powder or magnesium ammonium phosphate.
For the present invention, use the advantage of inorganic matter coated slow-release urea fertilizer to be supplementary soil sulphur nutrition-polysulfide, it can sterilization expelling parasite, can be absorbed by plants again.
The inorganic matter coated slow-release urea fertilizer that the present invention uses is product sold in the market, such as by Chinese maple slow release fertilizer (Jiangsu) Co., Ltd with trade name
the sulfur coating slow-release carbamide fertilizer sold, the calcium phosphate coated slow-release urea fertilizer sold with the U.S. Lin pellet of trade name by Jinan company of Le Xi fertilise Co., Ltd, the magnesium ammonium phosphate coated slow-release urea fertilizer sold with the U.S. Lin pellet of trade name by Jinan company of Le Xi fertilise Co., Ltd.
The organic matter coated slow-release urea fertilizer that the present invention uses is made up of according to weight ratio 1:15 ~ 50 organic matter coating layer and urea core; Described organic matter is selected from polyurethane, paraffin or linseed oil.
For the present invention, the advantage of organic matter coated slow-release urea fertilizer is used to be that rete is thinner, cost is low, solvent-free, no coupling product, so pollution-free.
The organic matter coated slow-release urea fertilizer that the present invention uses is product sold in the market, such as by Leading Bio-agricultural Co., Ltd. with trade name Fu Side
the polyurethane coated slow-release carbamide fertilizer sold.
The polymer capsule slow-release carbamide fertilizer that the present invention uses is made up of according to weight ratio 1:20 ~ 30 polymer capsule layer and urea core; Described polymer is selected from polyethylene, polypropylene or polybutene.
For the present invention, use the advantage of polymer capsule slow-release carbamide fertilizer to be by soil environment influence factor less, release profiles is serpentine, is conducive to the absorption of crop to nutrient.
The polymer capsule slow-release carbamide fertilizer that the present invention uses is product sold in the market, such as by Kingenta Ecological Engineering Group Co., Ltd. with the polyethylene coated slow-release urea fertilizer of the large sale of trade name Nintaus, initiate by Beijing the polypropylene coated slow-release urea fertilizer that new-type fertilizer Manufacturing Co., Ltd sells with trade name Si Geli.
The chemosynthesis slow release fertilizer that the present invention uses is ureaformaldehyde, butylene pitches two ureas or oxamides, they are the microsolubility nitrogen-containing compounds generated through condensation reaction by urea and organic compound, and wherein the content of urea is with described chemosynthesis slow release fertilizer total weight 30 ~ 38%.
For the present invention, the advantage of chemosynthesis slow release fertilizer is used to be to design arbitrarily and to produce the slow-release carbamide of different release period; Can discharge according to the demand of crop.Improve utilization rate of fertilizer; Involucrum fully biodegradable; Use safety, can not burn seedling.
The chemosynthesis slow release fertilizer that the present invention uses is product sold in the market, the ureaformaldehyde slow-release nitrogen fertilizer such as sold by Guangzhou Tianxiang agricultural science and technology Co., Ltd.
The test method of code requirement of the present invention determines the parameter at paddy seedbed middle use slow-release carbamide fertilizer, fundamentally solve raising rice seedlings fertility too high burning seedling, too low seedling is weak, effectively overcome nitrogen loss in seedbed fertilising process, improve fertilizer utilization efficiency and exempt to impose striking root fertilizer.User also specifically can mix evenly with amount of nitrogenous fertilizer and seedbed soil according to seedbed.The method is suitable for all paddy seedbed seedling, has a extensive future.
[beneficial effect]
The invention has the beneficial effects as follows: the present invention fundamentally solves raising rice seedlings fertility too high burning seedling, too low seedling is weak, effectively overcomes nitrogen loss in seedbed fertilising process, improves fertilizer utilization efficiency and exempts to impose striking root fertilizer.User also specifically can mix evenly with amount of nitrogenous fertilizer and seedbed soil according to seedbed.The method is suitable for all paddy seedbed seedling, has a extensive future.
[embodiment]
The present invention can be understood better by following embodiment.
Test example 1: slow-release carbamide fertilizer test in raising rice seedlings
One, test material and method
1. test material and design
Examination rice varieties is supplied to be Hunan early No. 45, Xian; Slow-release carbamide fertilizer is the polyurethane coated slow-release carbamide fertilizer being adopted seed-coating machine production and sales by Leading Bio-agricultural Co., Ltd..Its nitrogen content is 42.16%, and release time is 120 days; Nursery soil; 353 hole seedling-cultivating trays etc.
Test and carry out in white Yanghe River village of maple township, Taoyuan county, Changde City on March 20th, 2012, establish four process altogether: 1. conventional seedbed system soil is treated to contrast, imposes striking root fertilizer after rice transplanting; 2. use described film-coated controlled release fertilizer according to 200 grams/square meter, after rice transplanting, do not impose striking root fertilizer; 3. use described film-coated controlled release fertilizer according to 300 grams/square meter, after rice transplanting, do not impose striking root fertilizer; 4. use film-coated controlled release fertilizer according to 400 grams/square meter, after rice transplanting, do not impose striking root fertilizer.4 repetitions are all established in each process, randomized arrangement, and each process 90 is coiled.Transplanting after nursery.
Nursery stage carries out at same seedling growth greenhouse, and except seedbed soil adds film-coated controlled release fertilizer, other farming operation measure is identical.
2. pilot survey:
1. concentrate seedling operational procedure according to Hunan Province paddy rice, investigated the Seedling Quality in Rice of different disposal at after planting 20 days, its investigation result is listed in table 1.
Table 1: Seedling Quality in Rice testing result
As can be seen from the result of table 1, in height of seedling, leaf age value, greenery number etc., process two, three, four is all obviously better than Routine control process.Use the total radical of rice shoot of polyurethane coated slow-release carbamide fertilizer than contrast many 30%, plant dry weight is than contrast increase by 30%.
2. according to " crop cultivation " described method, carry out percentage establishment of seedling investigation to the rice seedling of different disposal, its investigation result is listed in table 2.
Table 2: different disposal method is on the impact of rice seedling percentage establishment of seedling
In table 2, seedlings refer to the rice shoot of 4.5-6.5 leaf phase, are mature seedling number; Seedling refers to the rice shoot in 3 leaf phases; Do not go out seed paddy and refer to the non-germination and emergence of rice paddy seed
As can be seen from the result of table 2, use the process three rice shoot percentage establishment of seedling of polyurethane coated slow-release carbamide fertilizer than contrast increase by 26.35%.
3. according to " crop cultivation " described method, investigate the quality of rice seedling after rice transplanting of different disposal, its investigation result is listed in table 3.
Table 3: Seedling Quality in Rice testing result after rice transplanting
As can be seen from Table 3, process three rice shoot using polyurethane coated slow-release carbamide fertilizer turns green Time transfer receiver according to 1.5 days in advance, and rice shoot growing way is sturdy, and significantly better than Routine control, available tillering increases 26.32% than contrast, without taking off fertile phenomenon after exempting to chase after striking root fertilizer.
Two, conclusion (of pressure testing):
After polyurethane coated slow-release carbamide fertilizer applied by Hunan Xian morning No. 45 seedling seedling dishes, seedling quality is good, and seedling stage does not burn seedling, Bai Genduo, and rice shoot dry is great simultaneously, and rooting ability is strong, without taking off fertile phenomenon after exempting to chase after 1 striking root fertilizer, tillers morning after rice transplanting; Percentage establishment of seedling is high, and rice seedling bed percentage establishment of seedling ratio reaches 99.15%, and grow neat pin seedling few, available tillering is many; To peasant saving of labor, save time, cost-saving.
Test example 2: slow-release carbamide fertilizer test in raising rice seedlings
One, test material and method
1, test material and design
Examination rice varieties is supplied to be Hunan No. 12, Xian in evening; Slow-release carbamide fertilizer is the sulfur coating slow-release carbamide fertilizer sold by Chinese maple slow release fertilizer (Jiangsu) Co., Ltd, and its nitrogen content is 37.15%, and release time is 60 days; Nursery soil; 353 hole seedling-cultivating trays etc.
Test and carry out in white Yanghe River village of maple township, Taoyuan county, changde, hunan province city on June 12nd, 2012, establish four process altogether: 1. conventional seedbed system soil is treated to contrast, imposes striking root fertilizer after rice transplanting; 2. use 200 grams/square meter sulfur coating slow-release carbamide fertilizer, after rice transplanting, do not impose striking root fertilizer; 3. use 500 grams/square meter sulfur coating slow-release carbamide fertilizer, after rice transplanting, do not impose striking root fertilizer; 4. use 800 grams/square meter sulfur coating slow-release carbamide fertilizer, after rice transplanting, do not impose striking root fertilizer.4 repetitions are all established in each process, randomized arrangement, and each process 90 is coiled.Transplanting after nursery.
Nursery stage carries out at same seedling growth greenhouse, and except seedbed soil adds described coated slow-release urea fertilizer, other farming operation measure is identical.
2. pilot survey:
1. according to " crop cultivation " described method, investigated the Seedling Quality in Rice of different disposal at after planting 20 days, its investigation result is listed in table 5.
Table 5: Seedling Quality in Rice investigation result
As can be seen from the result of table 5, use the process four rice shoot radical of sulfur coating slow-release carbamide fertilizer than contrast many 30.1%, plant dry weight increases by 28.85%.
2. according to " crop cultivation " described method, carry out percentage establishment of seedling investigation to the rice seedling of different disposal, its investigation result is listed in table 6.
Table 6: rice seedling percentage establishment of seedling investigation result
As can be seen from the result of table 6, the rice shoot percentage establishment of seedling using sulfur coating slow-release carbamide fertilizer increases obviously than contrast, and process three reaches 99.16%.。
3. according to " crop cultivation " described method, investigate the quality of rice seedling after rice transplanting of different disposal, its investigation result is listed in table 7.
Table 7: the quality investigation result after rice seedling rice transplanting
As can be seen from Table 7, the rice shoot using sulfur coating slow-release carbamide fertilizer turns green Time transfer receiver according to short 0.5 day, and available tillering increases than contrast.
Two, conclusion (of pressure testing):
After Hunan Xian in evening No. 12 seedling seedling dish application sulfur coating slow-release carbamide fertilizers, seedling quality is good, and seedling stage does not burn seedling, not excessive growth, Bai Genduo, and rice shoot dry is great simultaneously, and rooting ability is strong, without taking off fertile phenomenon after exempting to chase after 2 striking root fertilizer, tillers early after rice transplanting; Percentage establishment of seedling is high, and rice seedling bed percentage establishment of seedling ratio reaches 99%, and after rice transplanting, rice shoot growing way is sturdy, and available tillering is many.
Test example 3
One, test material and method
1, test site
Qing Feng farm, Hulin City, Heilongjiang Province, area 1.3hm
2.
2, test material
Decomposed manure, through the bed soil of crushing and screening, slow-release carbamide fertilizer is by the polyethylene coated slow-release urea fertilizer of Kingenta Ecological Engineering Group Co., Ltd.'s production and sales, its release period is divided into 60 days after measured, 90 days, 120,180 days, dragon round-grained rice 31 rice paddy seed, raising rice seedlings seedling dish etc.
3, test period and method
1. time: test and start to carry out seedbed seedling on April 2nd, 2012, nursery stage carries out at same seedling growth greenhouse, and unified management, with the uniformity of guarantee test.Transplant in unified employing on May 15 rice transplanter, 1.3hm
213 fields are divided in experimental field, often process each field, every block 0.1hm
2.And in unified mechanical harvest on September 26.
2. method: early stage seed treatment, put bed process, sowing, young plants management etc. and all use conventional method.Wherein adopt with the following method in seedbed soil preparation: 3 weight portions are crossed sifting bed soil and puddled evenly with the decomposed manure that trade name Shi Likang sells by Leading Bio-agricultural Co., Ltd. with 1 weight portion, then use " bacterium must be strengthened " seedling strengthen agent acid adjustment, sterilization, fertilising.During fertilising, bed soil, seedling strengthen agent and polyethylene coated slow-release urea fertilizer are fully puddled evenly the polyethylene coated slow-release urea fertilizer of 60 days, 90 days, 120,180 days (use release period respectively), every square metre of consumption 200-400 gram, measuring bed soil pH value is 4.5 ~ 5.5.
3. polyethylene coated slow-release urea soil fertility quality pattern sees the following form 8.
Table 8: use polyethylene coated slow-release urea soil fertility quality pattern
Two, test results and analysis
1. according to " crop cultivation " described method, investigate the Seedling Quality in Rice of different disposal, its investigation result is listed in table 9.
Table 9: Seedling Quality in Rice investigation result
As can be seen from Table 9.The greenery number of process one, two, three is few, is because fertilizer release is too fast, yellow leaf, and seedling impact is burnt in analysis; The height of seedling leaf of process four, five, six is few, and root system is undeveloped, belongs to excessive growth; Process ten, 11,12 growing ways are not obvious compared with Routine control, and analysis is that fertilizer discharged slowly, little to growth effect; The performance of process seven, eight, nine is relatively better.
In transplanting first 2 days, investigate the seedbed of different disposal, often process 3 samplings, often 10 × 10cm, rinses the kind paddy that rear number is respectively got seedlings number, seedling number and do not emerged well, asks calculation percentage establishment of seedling.
2. investigate the rice seedling percentage establishment of seedling of different disposal, its investigation result is listed in table 10.
Table 10: rice seedling percentage establishment of seedling investigation result
As can be seen from the result of table 10, process eight percentage establishment of seedlings best, reach 99.3%.
3. investigate the quality after rice seedling rice transplanting different disposal method, its investigation result is listed in table 11.
Table 11: the quality investigation result after rice seedling rice transplanting
As can be seen from the result of table 11, the Time transfer receiver of turning green of process seven, eight, nine is according to being advanced by 2.5 days, and plant height, plant fresh weight and available tillering also increase obviously than contrast in addition.
Three, conclusion (of pressure testing):
After described coated slow-release urea fertilizer applied by dragon round-grained rice 31 seedling seedling dish, one is that seedling quality is good, and seedling stage does not burn seedling, not excessive growth, blade is delicate and pretty, does not straight and uprightly drape over one's shoulders, anosis worm harm, Bai Genduo, rice shoot dry is great simultaneously, and rooting ability is strong, without taking off fertile phenomenon after exempting to chase after 2 striking root fertilizer, tillers early after rice transplanting; Two is that percentage establishment of seedling is high, and rice seedling bed percentage establishment of seedling ratio reaches 99%, and grow neat pin seedling few, after rice transplanting, rice shoot growing way is sturdy, and available tillering is many, for increasing production of rice lays the first stone, therefore has a extensive future.
Test example 4
One, test material and design
Examination rice varieties is supplied to be imperial round-grained rice 31; Ureaformaldehyde slow-release carbamide fertilizer is produced by Guangzhou Tianxiang agricultural science and technology Co., Ltd, and nitrogen content is 37.55%, and release time is 90 days; Seedbed soil; Raising rice seedlings seedling dish etc.
Test and carry out in Tao Shan town, Tieli City of Heilongjiang Province on April 5th, 2012, establish four process altogether: 1. conventional seedbed system soil is treated to contrast, imposes striking root fertilizer after rice transplanting; 2. use slow-release carbamide fertilizer 200 grams/square meter, after rice transplanting, do not impose striking root fertilizer; 3. use slow-release carbamide fertilizer 300 grams/square meter, after rice transplanting, do not impose striking root fertilizer; 4. use slow-release carbamide fertilizer 400 grams/square meter, after rice transplanting, do not impose striking root fertilizer.4 repetitions are all established in each process, randomized arrangement, and each process 90 is coiled.Transplanting after nursery.
Nursery stage carries out at same seedling growth greenhouse, and except seedbed soil adds slow-release carbamide fertilizer, other farming operation measure is identical.
Two, interpretation
1. according to " crop cultivation " described method, investigate the Seedling Quality in Rice of different disposal, its investigation result is listed in table 12.
Table 12: Seedling Quality in Rice investigation result
As can be seen from Table 12, the plant height of process three is than contrast increase by 21.91%, and radical is than contrast increase by 22.31%.
2. indoor species test investigation, its investigation result is listed in table 13.
Table 13: paddy rice species test investigation result
As can be seen from Table 13, slow-release carbamide fertilizer is obvious on the impact of yield factor, and improve the index such as ripening rate, thousand kernel weight, paddy rice can be increased production.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, everyly apply to the scope that the present invention relates to all in scope of patent protection of the present invention with this.
Claims (10)
1. the purposes of slow-release carbamide fertilizer in raising rice seedlings, is characterized in that in conventional paddy seedbed soil, evenly adding slow-release carbamide fertilizer according to 200-800 gram/m.
2. purposes according to claim 1, is characterized in that described slow-release carbamide fertilizer is selected from inorganic matter coated slow-release urea fertilizer, organic matter coated slow-release urea fertilizer, polymer capsule slow-release carbamide fertilizer or chemosynthesis slow release fertilizer.
3. purposes according to claim 1 and 2, is characterized in that the release period of described slow-release carbamide fertilizer is 60 ~ 180 days.
4. purposes according to claim 1 and 2, is characterized in that the release period of described slow-release carbamide fertilizer is 100 ~ 140 days.
5. purposes according to claim 1 and 2, is characterized in that the granularity of described slow-release carbamide fertilizer is 1.0 ~ 4.75mm.
6. purposes according to claim 1, is characterized in that the addition of described slow-release carbamide fertilizer is 300-650 gram/m.
7. purposes according to claim 1 and 2, is characterized in that described inorganic matter coated slow-release urea fertilizer is made up of according to weight ratio 1:5 ~ 9 inorganic matter coating layer and urea core.Described inorganic matter is selected from sulphur, calcium phosphate, talcum powder or magnesium ammonium phosphate.
8. purposes according to claim 1 and 2, is characterized in that described organic matter coated slow-release urea fertilizer is made up of according to weight ratio 1:15 ~ 50 organic matter coating layer and urea core; Described organic matter is selected from polyurethane, paraffin or linseed oil.
9. purposes according to claim 2, is characterized in that described polymer capsule slow-release carbamide fertilizer is made up of according to weight ratio 1:20 ~ 30 polymer capsule layer and urea core; Described polymer is selected from polyethylene, polypropylene or polybutene.
10. purposes according to claim 2, is characterized in that described chemosynthesis slow release fertilizer is ureaformaldehyde, butylene pitches two ureas or oxamides, and wherein the content of urea is with described chemosynthesis slow release fertilizer total weight 30 ~ 38%.
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| CN104956828A (en) * | 2015-07-01 | 2015-10-07 | 刘静祯 | Green-returning planting technology of rice |
| CN106316639A (en) * | 2016-08-29 | 2017-01-11 | 贵阳开磷化肥有限公司 | Preparation method of controlled-release fertilizer for plums |
| CN107721684A (en) * | 2017-11-29 | 2018-02-23 | 江苏省农业科学院 | A kind of paddy rice-dedicated fertilizer with slow release effect |
| CN107721677A (en) * | 2017-11-29 | 2018-02-23 | 江苏省农业科学院 | A kind of corn fertilizer with slow release effect |
| CN111348942A (en) * | 2020-02-20 | 2020-06-30 | 安徽农业大学 | Mixed fertilizer for rice and capable of matching nitrogen requirements in targeted manner and application of mixed fertilizer |
| CN114133298A (en) * | 2021-12-20 | 2022-03-04 | 江苏省农业科学院 | One-time fertilization and industrial seedling raising method for rice |
| CN115024188A (en) * | 2022-01-21 | 2022-09-09 | 江苏省农业科学院 | Preparation method of nitrogen slow-release type straw seedling raising substrate disc |
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| CN104956828A (en) * | 2015-07-01 | 2015-10-07 | 刘静祯 | Green-returning planting technology of rice |
| CN106316639A (en) * | 2016-08-29 | 2017-01-11 | 贵阳开磷化肥有限公司 | Preparation method of controlled-release fertilizer for plums |
| CN107721684A (en) * | 2017-11-29 | 2018-02-23 | 江苏省农业科学院 | A kind of paddy rice-dedicated fertilizer with slow release effect |
| CN107721677A (en) * | 2017-11-29 | 2018-02-23 | 江苏省农业科学院 | A kind of corn fertilizer with slow release effect |
| CN111348942A (en) * | 2020-02-20 | 2020-06-30 | 安徽农业大学 | Mixed fertilizer for rice and capable of matching nitrogen requirements in targeted manner and application of mixed fertilizer |
| CN114133298A (en) * | 2021-12-20 | 2022-03-04 | 江苏省农业科学院 | One-time fertilization and industrial seedling raising method for rice |
| CN115024188A (en) * | 2022-01-21 | 2022-09-09 | 江苏省农业科学院 | Preparation method of nitrogen slow-release type straw seedling raising substrate disc |
| CN115024188B (en) * | 2022-01-21 | 2024-02-23 | 江苏省农业科学院 | Preparation method of nitrogen slow-release type straw seedling raising substrate tray |
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