CN103907495A - Technique for utilizing pretilachlor to prevent and remove weedy rice in water-direct-seeding rice field - Google Patents
Technique for utilizing pretilachlor to prevent and remove weedy rice in water-direct-seeding rice field Download PDFInfo
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- CN103907495A CN103907495A CN201410164304.1A CN201410164304A CN103907495A CN 103907495 A CN103907495 A CN 103907495A CN 201410164304 A CN201410164304 A CN 201410164304A CN 103907495 A CN103907495 A CN 103907495A
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Abstract
The invention discloses a rice seed soaking agent and a using technique thereof. The rice seed soaking agent is 20% fenclorim EC, is 30mg/L in seed soaking concentration, is high in safety and capable of remarkably reduce phytotoxicity of pretilachlor to rice and can be applied to prevention and control of weedy rice in a water-direct-seeding rice field. Compared with a method of spraying after rice seeding, the rice seed soaking agent and the using technique have the advantages of low consumption, low cost and easiness in operation.
Description
Technical field
The present invention relates to the control technology of a kind of paddy rice seed soaking agent and a kind of Direct sowing rice field Weedy Rice.
Background technology
Cultivated rice water direct seeding technology is because having the agriculture production cost of saving, welcome by peasant compared with low labour intensity and the rice seedling advantages such as morning of emerging.In recent years, along with this cultivation technique spread, the area of the current water direct seeding rice of China has exceeded 2,000,000 hectares.In addition, along with the propelling of the market-oriented rule of development, industrialization and urbanization, will inevitably cause the variation of rural laborer's structure, therefore, taking water direct seeding is the important way of China's rice cropping from now on.
Direct-seeding Rice as one save time, the culture technique of laborsaving, abridged edition, cultivated area continues to expand.And due to Weedy Rice can with the synchronous growth of Direct-seeding Rice seedling, and early stage paddy rice dry wet cultivation, the growth of very favourable Weedy Rice again, Weedy Rice competitive strong growth vigor again, it is serious that result causes direct sowing rice weed rice that harm occurs.According to statistics, 1～9 strain/m
2weedy Rice can cause respectively 8.3～33.9% Rice Yield Loss Caused.In addition, Weedy Rice has higher nitrogen utilization efficiency and photosynthetic efficiency, and therefore, along with warming of weather, the harm of Weedy Rice certainly will be further serious.
The third careless amine is chloroacetanilide herbicides, and the grassy weed in paddy field is had to good control effect, can be used for management of weeds rice.But due to the homology similitude of cultivated rice and Weedy Rice, the third careless amine, at the Weedy Rice of preventing and kill off water direct seeding field, usually makes it produce poisoning.Fenclorim is mixed with the third careless amine improves the third safety of careless amine to cultivated rice.Although the method has been avoided the generation of the third careless amine phytotoxicity accident, Weedy Rice also absorption in various degree safener, its preventive effect is reduced greatly.Therefore, the use new technology of innovation safener fenclorim, the scope of application of expansion the third careless amine, the generation of management of weeds rice is most important.
Summary of the invention
The object of the invention is to the deficiency for Weedy Rice control technology in existing Direct sowing rice field, the control technology of a kind of water direct seeding field weed rice is provided.
The present invention is achieved through the following technical solutions above-mentioned purpose:
Weed killer herbicide, its main component is the third careless amine, is used for management of weeds rice; Cultivated rice seed soaking agent, its main component is fenclorim, is used for conserving culture rice to avoid the poisoning of the third careless amine.
Water direct seeding field weed rice control technology, comprises the steps: that then vernalization to bud is about 2mm by the fenclorim solution seed soaking 48h of cultivated rice 30mg/L, then sowing.
Cultivated rice sowing is after 2 days, and the third careless amine is with 450～675g a.i./hm
2usage amount, soil spraying is processed.
Compared with existing Weedy Rice control technology, the present invention has following advantage:
(1) can improve significantly the preventive effect of the third careless amine to Weedy Rice, and improve the third safety of careless amine to cultivated rice.
(2) compared with spraying fenclorim, the fenclorim consumption in the present invention is few, and cost is low.
Embodiment
Paddy rice seed soaking agent of the present invention is 20%EC fenclorim.
Embodiment 1
(1) application test one laboratory test of the paddy rice seed soaking agent that enforcement makes:
Laboratory test is year October in July, 2012 to 2012, in Agricultural University Of Nanjing's weed killer herbicide virulence and pesticide resistance Laboratory Temperature is indoor carries out.Be for examination cultivated rice kind new two excellent No. 6.
Laboratory test process
1. the protection research of variable concentrations fenclorim seed soaking to cultivated rice
The planting type of Simulated Water Direct-seeding Rice packs the soil that sieves that did not use weed killer herbicide in plastic cup, pH value 6.7, and the content of organic matter is 1.59%, adds water to saturated.Select the cultivated rice seed of full seed, with the fenclorim solution of variable concentrations (3.3,10,30,90,270mg/L) seed soaking 48h, rinse 3 times with clear water, taking Seed soaking as contrast, then vernalization.Select bud to be about as the cultivated rice seed of seed length half and sow at soil surface uniformly, sow 15 for every glass, and then cover one deck fine earth, after 24h, take spray-on process to carry out soil treatment to cultivated rice.The formulation rate of the third careless amine is field recommended dose 450g a.i./hm
2the raw spray tower of surveying of 3WPSH-500D type that spraying adopts Nanjing Agriculturing Mechanization Inst., Ministry of Agriculture to produce, disk diameter 50cm, turn/min of main shaft velocity of rotation 6, shower nozzle aperture 0.3mm, atomisation pressure 0.3MPa, fogdrop diameter 100 μ m, capacity of sprinkler 90mL/min, medicine liquid volume 30mL, contrast sprays equivalent clear water, and every processing repeats 4 times.
2. the protection research of the different seed soaking times of fenclorim to cultivated rice
Select the cultivated rice seed of full seed, in 25 DEG C of incubators, soak seed respectively 6,12,24 and 48h with the fenclorim solution of 30mg/L, with clear water flushing 3 times, taking Seed soaking as contrast, then vernalization.The formulation rate of the third careless amine is field recommended dose 450g a.i./hm
2, spraying and cultural method are with 1.
After laboratory test dispenser 15 days, measure cauline leaf fresh weight and the root system fresh weight of cultivated rice, and calculate the growth inhibition ratio of the third careless amine to cultivated rice between different disposal.
Laboratory test results is as shown in table 1, table 2:
The protective effect to cultivated rice of soaking seed of table 1 variable concentrations fenclorim
Note: in table, data are the mean+SD repeating for 4 times, and it is remarkable that alphabetical difference is illustrated in p<005 level difference, lower same.
The protective effect of the different seed soaking times of table 2 fenclorim to cultivated rice
As shown in Table 1, after fenclorim seed soaking, the third careless amine obviously reduces the inhibitory action of cultivated rice growth.The formulation rate of the third careless amine is 450ga.i./hm
2time, fenclorim seed soaking concentration is within the scope of 3.3～270mg/L, and the seed soaking of 30mg/L fenclorim is best to the protection effect of cultivated rice.As shown in Table 2, the fenclorim seed soaking 48h of 30mg/L, can alleviate 450g a.i/hm significantly
2the poisoning of the third careless amine to cultivation.This explanation, cultivated rice is the concentration seed soaking 48h with 30mg/L with this seed soaking agent, can protect it to avoid the poisoning of the third careless amine.
(2) application test-field trial of the paddy rice seed soaking agent that enforcement makes
Field experiment, year November in June, 2013 to 2013, is carried out in proving ground, Lishui, Jiangsu Province Agriculture Science Institute, and experimental cultivar is new two excellent No. 6.The fenclorim solution seed soaking 48h of 30mg/L for cultivated rice, then rinses 3 times with clear water, 25 DEG C of vernalization 48h in incubator, and taking Seed soaking 48h as contrast, then sowing.Before sowing, dry in the air after turning over field 7 days, rice field, then go up water leveling field, soaks field and after 4 days, water is discharged, but have water, ground moistening, then division of cells, every community area 20m in the septal fossula of maintenance field
2.Its seeding quantity is 40kg/hm
2, after planting 2d sprays the third careless amine, and the formulation rate of the third careless amine is 450,675,900g a.i./hm
2, control plot sprays the clear water of equivalent, and each combined treatment repeats 3 times, random arrangement subdistrict position.Spraying adopts manual sprayer, water consumption 400L/hm
2.
After field trial medicine, 7d investigates the emergence rate of cultivated rice, measures the plant height of cultivated rice after 20d, measures the output of every community when results.
Field test results is as shown in table 3:
Table 3 fenclorim alleviates the field test effect of the third careless amine to cultivated rice poisoning
Note: in table, data are the mean+SD repeating for 3 times, and it is remarkable that alphabetical difference is illustrated in p<0.05 level difference.
As can be seen from Table 3, fenclorim seed soaking, can alleviate the third poisoning of careless amine to cultivated rice, improves the third safety of careless amine to cultivated rice.When the formulation rate of the third careless amine is 450,675,900g a.i./hm
2time, cultivated rice is through the fenclorim seed soaking of 30mg/L, and emergence rate is than only processing and improved respectively 18.93%, 21.24%, 11.5% with the third careless amine; Plant height inhibiting rate has reduced by 4.69%, 22.59%, 9.77%; Output has improved 782,1180,1155Kg/hm
2.But cultivated rice is through the fenclorim seed soaking of 30mg/L, the formulation rate of the third careless amine is 900g a.i./hm
2time, significantly the decline fenclorim seed soaking of 2 explanation 30mg/L of rice yield, can alleviate 450～675g a.i./hm
2the poisoning that cultivated rice is caused of the third careless amine.
Claims (4)
1. prevent and kill off a technology for Direct sowing rice field Weedy Rice, it is characterized in that cultivated rice is after safener fenclorim seed soaking, re-use the third careless amine and prevent and kill off the Weedy Rice in Direct sowing rice field.
2. water direct seeding field weed rice control technology according to claim 1, the working concentration that it is characterized in that fenclorim is 30mg/L.
3. water direct seeding field weed rice control technology according to claim 1, is characterized in that the seed soaking time of paddy rice in fenclorim solution is 48h, and then vernalization to bud is about 2mm.
4. water direct seeding field weed rice control technology according to claim 1, the spraying time that it is characterized in that the third careless amine is after broadcasting 1～2 day, formulation rate is 450～675g a.i./hm
2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410164304.1A CN103907495A (en) | 2014-04-23 | 2014-04-23 | Technique for utilizing pretilachlor to prevent and remove weedy rice in water-direct-seeding rice field |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104522020A (en) * | 2014-12-08 | 2015-04-22 | 南京农业大学 | Three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds |
| CN104982270A (en) * | 2015-06-04 | 2015-10-21 | 南京农业大学 | Technology of weedy rice prevention and removal by utilizing weedy rice biological characteristic |
| CN105494340A (en) * | 2015-12-02 | 2016-04-20 | 南京农业大学 | Technology for controlling and removing Oryza sativa f. spontanea from dry direct-seeding paddy field by adopting synergy of fenclorim seed dressing agent and pretilachlor |
| CN110192556A (en) * | 2019-05-29 | 2019-09-03 | 上海祥霖农业技术有限公司 | The safety closing herbicide in one seed shrimp rice field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070066484A1 (en) * | 2005-09-21 | 2007-03-22 | Leeper John R | Synergistic composition and method of use |
| CN102326555A (en) * | 2011-09-09 | 2012-01-25 | 华南农业大学 | Paddy rice seed soaking agent and application thereof |
| CN102524302A (en) * | 2012-01-08 | 2012-07-04 | 庄晓曦 | Rice seed soaking agent and using method thereof |
| CN102674973A (en) * | 2012-05-28 | 2012-09-19 | 广西乐土生物科技有限公司 | Herbicide-fertilizer for direct-seeding rice field and production method of herbicide-fertilizer |
-
2014
- 2014-04-23 CN CN201410164304.1A patent/CN103907495A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070066484A1 (en) * | 2005-09-21 | 2007-03-22 | Leeper John R | Synergistic composition and method of use |
| CN102326555A (en) * | 2011-09-09 | 2012-01-25 | 华南农业大学 | Paddy rice seed soaking agent and application thereof |
| CN102524302A (en) * | 2012-01-08 | 2012-07-04 | 庄晓曦 | Rice seed soaking agent and using method thereof |
| CN102674973A (en) * | 2012-05-28 | 2012-09-19 | 广西乐土生物科技有限公司 | Herbicide-fertilizer for direct-seeding rice field and production method of herbicide-fertilizer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104522020A (en) * | 2014-12-08 | 2015-04-22 | 南京农业大学 | Three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds |
| CN104982270A (en) * | 2015-06-04 | 2015-10-21 | 南京农业大学 | Technology of weedy rice prevention and removal by utilizing weedy rice biological characteristic |
| CN105494340A (en) * | 2015-12-02 | 2016-04-20 | 南京农业大学 | Technology for controlling and removing Oryza sativa f. spontanea from dry direct-seeding paddy field by adopting synergy of fenclorim seed dressing agent and pretilachlor |
| CN110192556A (en) * | 2019-05-29 | 2019-09-03 | 上海祥霖农业技术有限公司 | The safety closing herbicide in one seed shrimp rice field |
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Application publication date: 20140709 |