CN109392395A - A kind of recommendation method of administration of corn nitrogen chemical fertilizer - Google Patents
A kind of recommendation method of administration of corn nitrogen chemical fertilizer Download PDFInfo
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- CN109392395A CN109392395A CN201811392649.7A CN201811392649A CN109392395A CN 109392395 A CN109392395 A CN 109392395A CN 201811392649 A CN201811392649 A CN 201811392649A CN 109392395 A CN109392395 A CN 109392395A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 240000008042 Zea mays Species 0.000 title claims abstract description 104
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 104
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 104
- 235000005822 corn Nutrition 0.000 title claims abstract description 104
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 53
- 239000003337 fertilizer Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 62
- 239000000618 nitrogen fertilizer Substances 0.000 claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 39
- 239000011574 phosphorus Substances 0.000 claims description 39
- 229910052698 phosphorus Inorganic materials 0.000 claims description 36
- 239000002686 phosphate fertilizer Substances 0.000 claims description 17
- 239000013256 coordination polymer Substances 0.000 claims description 16
- 239000005416 organic matter Substances 0.000 claims description 16
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 15
- 239000011591 potassium Substances 0.000 claims description 15
- 229910052700 potassium Inorganic materials 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 229940072033 potash Drugs 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 235000015320 potassium carbonate Nutrition 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 3
- 235000003715 nutritional status Nutrition 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 1
- 230000004720 fertilization Effects 0.000 abstract description 7
- 235000015097 nutrients Nutrition 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000004016 soil organic matter Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/007—Determining fertilization requirements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Forestry; Mining
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- Marketing (AREA)
- Marine Sciences & Fisheries (AREA)
- Mining & Mineral Resources (AREA)
- Agronomy & Crop Science (AREA)
- Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Animal Husbandry (AREA)
- Primary Health Care (AREA)
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- Tourism & Hospitality (AREA)
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- General Business, Economics & Management (AREA)
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- Fertilizers (AREA)
Abstract
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention determines the nitrogen fertilizer recommendation dosage N in the corn growth period according to the target output of corn, soil nutrient statusT=NP*YM+(10‑M)*MC+CN, NTFor the nitrogen fertilizer recommendation dosage Y of corn per acreMFor the target output of corn, NPFor the nitrogen specific yield coefficient of corn, M is soil organic matter content measured value, MCFor soil organism usage factor, CNRecommend ecological environment comprehensive correction parameter for nitrogen.The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, calculation formula is scientific, simple, effective, solve that previous fertilization recommendation method is cumbersome, is not easy the drawbacks of controlling, scientific basis is given for amount of application of nitrogen fertilizer in the corn growth period, while guaranteeing corn yield, fertilising waste and influence of the excessive fertilization to environment are in turn avoided, beneficial effect is significant, is suitable for the application of popularization.
Description
Technical field
The present invention relates to a kind of recommendation method of administration of corn nitrogen chemical fertilizer, more specifically, more particularly to a kind of synthesis examine
Consider the nitrogen specific yield coefficient of corn, the organic matter of soil absorption or supplement, nitrogen and recommends ecological environment comprehensive correction parameter
The recommendation method of administration of corn nitrogen chemical fertilizer.
Background technique
Corn worldwide has the plantation of very large area, and cultivated area and yield are only second to rice and wheat,
Therefore the rational application of fertilizer method of research and extension corn, can not only realize the saving of fertilizer, but also also ensure the yield of corn.
It is multiple that currently used nutrient balance method fertilization recommendation is related to soil nutrient usage factor, chemical fertilizer utilization ratio, nutrients uptake amounts etc.
Parameter, calculating process is cumbersome, and the superposition of each parameter error causes recommendation results deviation to increase, and often will appear dose is
Negative value or odd high situation.When Plentiful-lack index method fertilization recommendation, basic nutrient is more than or slightly lower several mg/ near graded index
When kg, but there is the difference of great-jump-forward in recommendation results.Therefore, develop it is a kind of simple, calculate or convenient fertilising calculating side of tabling look-up
Method is conducive to peasant and applies fertilizers scientifically.
Summary of the invention
The present invention in order to overcome the shortcomings of the above technical problems, provides a kind of recommendation method of administration of corn nitrogen chemical fertilizer.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention is determined according to the target output of corn, soil nutrient status
Nitrogen fertilizer recommendation dosage N in the corn growth periodT:
NT=NP*YM+(10-M)*MC+CN (1)
In formula (1), NTFor the nitrogen fertilizer recommendation dosage of corn per acre, units/kg/mu, YMFor the target output of corn, units/kg/
Mu, NPFor the nitrogen specific yield coefficient of corn, size is equal to corn specific yield nitrogen fertilizer absorption amount；M contains for the soil organism
Measure definite value, unit g/kg, MCFor soil organism usage factor, CNRecommend ecological environment comprehensive correction parameter for nitrogen.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the nitrogen specific yield coefficient N of the cornPValue is
0.02, the usage factor M of the soil organismCValue is 0.25, and formula (1) is converted into formula (2):
NT=0.02*YM+(10-M)*0.25+CN (2)
Wherein nitrogen recommends ecological environment comprehensive correction parameter CNValue range is respectively 1~3.5.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the target output of corn are not recommended to make when being lower than 400kg/ mus
Use phosphate fertilizer；When target output is higher than 400kg/ mus, corn growth week is determined according to the target output of corn, soil nutrient status
Phosphate fertilizer in phase recommends dosage PT:
PT=PP*(YM-400)+(20-PS)*PC+CP (3)
In formula (3), PTRecommend dosage, units/kg/mu, Y for the phosphate fertilizer of corn per acreMFor the target output of corn, units/kg/
Mu, PPFor the phosphate unit output coefficient of corn, size is equal to corn specific yield phosphate fertilizer uptake；PSContain for soil available phosphorus
Measure definite value, unit mg/kg, PCFor soil available phosphorus usage factor, CPRecommend ecological environment comprehensive correction parameter for phosphorus.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the phosphate unit output coefficient P of the cornPValue is
0.02, the usage factor P of soil available phosphorusCValue 0.15, formula (3) are converted into formula (4):
PT=0.02* (YM-400)+(20-PS)*0.15+CP (4)
Wherein phosphorus recommends ecological environment comprehensive correction parameter CPValue range be respectively 0~2.5.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, contains according to the target output of corn and soil effective K
Amount determines that the potash fertilizer in the corn growth period recommends dosage K by table 1T:
Table 1
[indicating to contain endpoint value) therein indicates to be free of endpoint value；When the target output of corn does not have corresponding value in table 1
When, then it is poor to determine potassium recommendation fertilizer amount K with interpolation methodT。
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the nitrogen, phosphorus, potash fertilizer recommend dosage NT、PT、KTIt respectively refers to
Pure N, pure P2O5, pure amount K2O, corresponding fertilizer amount needs are calculated according to its nitrogen, phosphorus, potassium content.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the target output Y of the cornMValue between nearest 3
Between 3 years maximum outputs and the 120% of nearest 3 three years maximum outputs.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, the survey of the soil organism, available phosphorus, quick-acting potassium content
Determine method are as follows: 10-15 soil sample point is determined according to " S " the type method of layouting in target farmland, in the 20- of each sample point
40cm depth takes three parts of soil and retains, in the lab according to three parts of soil measure respectively each sample point organic matter,
Available phosphorus, quick-acting potassium content obtain organic matter, available phosphorus, the quick-acting potassium content in target farmland after being averaging to all sample points.
The recommendation method of administration of corn nitrogen chemical fertilizer of the invention, nitrogen, phosphorus recommend ecological environment comprehensive correction parameter CN、 CP's
Value is respectively 2,1 for Northwest Shandong Plain area, is respectively 2.5,0 for the Hills And Low Mountains of east in Shandong Province, for middle areas in Shandong Province mountain
It is respectively 2.5,0.5 for ground hills area, is respectively 1.5,0.5 for the region of no relief of middle areas in Shandong Province the north, it is flat for middle areas in Shandong Province south
It is respectively 1.5,0.5 for former area, is respectively 2,1.5 for the salination area of east in Shandong Province north；The Northwest Shandong Plain established accordingly
Area's corn recommended fertilizer retrieves table 2 are as follows:
Table 2
The beneficial effects of the present invention are: the recommendation method of administration of corn nitrogen chemical fertilizer of the invention, is produced using the target of corn
Amount obtains nitrogenous fertilizer expense during corn growth, according to organic in soil multiplied by the specific yield nitrogen fertilizer absorption amount of corn
The amount of nitrogenous fertilizer that the measured value of object obtains soil absorption multiplied by organic matter usage factor or can supplement finally is counting nitrogen recommendation life in
State environment comprehensive corrects parameter, that is, obtains corn and reach the required scientific and reasonable calculation formula for applying nitrogenous fertilizer when target output,
It is calculation formula science, simple, effectively, it solves that previous fertilization recommendation method is cumbersome, is not easy the drawbacks of controlling, is corn growth week
Amount of application of nitrogen fertilizer gives scientific basis in phase, while guaranteeing corn yield, in turn avoids fertilising waste and excessive fertilization
Influence to environment, beneficial effect is significant, is suitable for the application of popularization.
Specific embodiment
According to the target output Y of cornM, available phosphorus content measurement in soil with organic matter content measured value M and soil
Value PS, determine the nitrogen fertilizer recommendation dosage N in the corn growth periodTAs shown in formula (1):
NT=NP*YM+(10-M)*MC+CN (1)
In formula (1), NTFor the nitrogen fertilizer recommendation dosage of corn per acre, units/kg/mu, YMFor the target output of corn, units/kg/
Mu, NPFor the nitrogen specific yield coefficient of corn, size is equal to corn specific yield nitrogen fertilizer absorption amount；M contains for the soil organism
Measure definite value, unit g/kg, MCFor soil organism usage factor, CNRecommend ecological environment comprehensive correction parameter for nitrogen.
In formula (1), it is made of on the right side of equal sign 3 parts, part 1 NP*YMFor the target output and specific yield nitrogen of corn
The product of fertile uptake, meaning are amount of nitrogenous fertilizer absorbed in corn growth process.Part 2 (10-M) * MCFor organic matter
The nitrogenous fertilizer absorbed from soil with the product of soil organism usage factor, meaning for the nitrogenous fertilizer or corn of soil absorption, when
When soil with organic matter content M < 10, (10-M) * MC> 0 shows that the organic matter in soil is not enough to be supplied to corn growth,
But also the external nitrogenous fertilizer applied is needed to supplement the organic matter in soil；As soil with organic matter content M > 10,
(10-M)*MC< 0 shows that the part organic matter in soil can be absorbed by corn growth and utilizes.Part III CNRecommend to give birth to for nitrogen
State environment comprehensive corrects parameter, carries out value according to practical farm environment.
Phosphate fertilizer is not recommended to use when the target output of corn is lower than 400kg/ mus；When target output is higher than 400kg/ mus
When, determine that the phosphate fertilizer in the corn growth period recommends dosage P according to the target output of corn, soil nutrient statusT:
PT=PP*(YM-400)+(20-PS)*PC+CP (3)
In formula (3), PTRecommend dosage, units/kg/mu, P for the phosphate fertilizer of corn per acrePFor the phosphate unit output coefficient of corn,
Its size is equal to corn specific yield phosphate fertilizer uptake；PSFor soil available phosphorus assay value, unit mg/kg, PCFor soil
Available phosphorus usage factor, CPRecommend ecological environment comprehensive correction parameter for phosphorus.
Similarly, it is also made of 3 parts on the right side of formula (3) equal sign, first part PP*(YM- 400) for greater than 400kg/ mus
Target output and phosphate unit output coefficient product, meaning be corn growth process absorbed in phosphate fertilizer amount；Second
Divide (20-PS)*PCFor the product of soil available phosphorus and its usage factor, the phosphate fertilizer amount for being soil absorption or the phosphate fertilizer quilt in soil
The utilization of corn, as available phosphorus content P in soilS< 20g/kg, (20-PS)*PC> 0 demonstrates the need for additional phosphate fertilizer to soil
Available phosphorus in earth is supplemented, and P is worked asSWhen > 20, then the part available phosphorus in soil can be absorbed by the growth of corn.Third
Part CPRecommend ecological environment comprehensive correction parameter for phosphorus, value is carried out according to the actual environment in farmland.
Based on a large amount of fertilising investigation, experiment and demonstration data and related documents and materials, establish dose and crop yield,
Soil nutrient content is mutually related fertilization recommendation empirical equation, nitrogen, phosphate unit output coefficient NP、PPValue be respectively 0.02,
0.02, the usage factor M of the soil organism, available phosphorusC、PCRespectively 0.25,0.15, in this way, nitrogen fertilizer recommendation dosage NTCalculating
Formula (1) and phosphate fertilizer recommend dosage PTCalculation formula (3) be just separately converted to formula (2), (4):
NT=0.02*YM+(10-M)*0.25+CN (2)
PT=0.02* (YM-400)+(20-PS)*0.15+CP (4)
Wherein nitrogen recommends ecological environment comprehensive correction parameter CNValue range is respectively 1~3.5, and phosphorus recommends ecological environment is comprehensive to rectify
Positive parameter CPValue range be respectively 0~2.5.
According to the target output of corn and soil effective K content, the potash fertilizer in the corn growth period is determined by table 1
Recommend dosage KT:
Table 1
[indicating to contain endpoint value) therein indicates to be free of endpoint value；When the target output of corn does not have corresponding value in table 1
When, then it is poor to determine potassium recommendation fertilizer amount K with interpolation methodT。
Above-mentioned nitrogen, phosphorus, potash fertilizer recommend dosage NT、PT、KTRespectively refer to pure N, pure P2O5, pure amount K2O, corresponding fertilizer amount need
It to be calculated according to its nitrogen, phosphorus, potassium content.The target output Y of cornMValue between nearest 3 three years maximum outputs with
Between the 120% of nearest 3 three years maximum outputs.
The measuring method of the soil organism, available phosphorus, quick-acting potassium content are as follows: layout method in target farmland according to " S " type
It determines 10-15 soil sample point, take three parts of soil in the 20-40cm depth of each sample point and retains, in the lab
The organic matter, available phosphorus, quick-acting potassium content for measuring each sample point respectively according to three parts of soil, after being averaging to all sample points
Obtain organic matter, available phosphorus, the quick-acting potassium content in target farmland.
In the investigation of largely being applied fertilizer such as Yantai, Heze, Liaocheng, experiment and demonstration data, obtain: nitrogen, phosphorus recommend ecology
Environment comprehensive corrects parameter CN、CPValue, for Northwest Shandong Plain area be respectively 2,1, for the Hills And Low Mountains of east in Shandong Province
Respectively 2.5,0 are respectively 2.5,0.5 for middle areas in Shandong Province hilly area, are respectively for the region of no relief of middle areas in Shandong Province the north
1.5,0.5, it is respectively 1.5,0.5 for the region of no relief of middle areas in Shandong Province south, respectively 2 for the salination area of east in Shandong Province north,
1.5；The Northwest Shandong Plain area corn recommended fertilizer retrieval table 2 established accordingly are as follows:
Table 2
During practice, if the target output of Northwest Shandong Plain area corn is 600kg/ mus, the soil organism
It for 10g/kg, then can be found by upper table 2, the amount of nitrogenous fertilizer of the application is 14.5kg；If soil organism detected value is
9g/kg then can seek nitrogen fertilizer amount by formula (2) due to not having corresponding content of organic matter value in table 2, can also be in table 2
Amount of nitrogenous fertilizer required when organic matter is 8g/kg, 10g/kg is found out, amount of nitrogenous fertilizer is being obtained by interpolation method.
Claims (9)
1. a kind of recommendation method of administration of corn nitrogen chemical fertilizer, which is characterized in that according to the target output of corn, soil nutrient status
Determine the nitrogen fertilizer recommendation dosage N in the corn growth periodT:
NT=NP*YM+(10-M)*MC+CN (1)
In formula (1), NTFor the nitrogen fertilizer recommendation dosage of corn per acre, units/kg/mu, YMFor the target output of corn, units/kg/
Mu, NPFor the nitrogen specific yield coefficient of corn, size is equal to corn specific yield nitrogen fertilizer absorption amount；M contains for the soil organism
Measure definite value, unit g/kg, MCFor soil organism usage factor, CNRecommend ecological environment comprehensive correction parameter for nitrogen.
2. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 1, which is characterized in that the nitrogen unit of the corn
Output coefficient NPValue is 0.02, the usage factor M of the soil organismCValue is 0.25, and formula (1) is converted into formula (2):
NT=0.02*YM+(10-M)*0.25+CN (2)
Wherein nitrogen recommends ecological environment comprehensive correction parameter CNValue range is respectively 1~3.5.
3. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 1, which is characterized in that the target output of corn is low
Phosphate fertilizer is not recommended to use when 400kg/ mus；When target output is higher than 400kg/ mus, supported according to the target output of corn, soil
Point situation determines that the phosphate fertilizer in the corn growth period recommends dosage PT:
PT=PP*(YM-400)+(20-PS)*PC+CP (3)
In formula (3), PTRecommend dosage, units/kg/mu, Y for the phosphate fertilizer of corn per acreMFor the target output of corn, units/kg/
Mu, PPFor the phosphate unit output coefficient of corn, size is equal to corn specific yield phosphate fertilizer uptake；PSContain for soil available phosphorus
Measure definite value, unit mg/kg, PCFor soil available phosphorus usage factor, CPRecommend ecological environment comprehensive correction parameter for phosphorus.
4. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 3, which is characterized in that the phosphate unit of the corn
Output coefficient PPValue is 0.02, the usage factor P of soil available phosphorusCValue 0.15, formula (3) are converted into formula (4):
PT=0.02* (YM-400)+(20-PS)*0.15+CP (4)
Wherein phosphorus recommends ecological environment comprehensive correction parameter CPValue range be respectively 0~2.5.
5. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 3, which is characterized in that produced according to the target of corn
Amount and soil effective K content determine that the potash fertilizer in the corn growth period recommends dosage K by table 1T:
Table 1
[indicating to contain endpoint value) therein indicates to be free of endpoint value；When the target output of corn does not have corresponding value in table 1
When, then it is poor to determine potassium recommendation fertilizer amount K with interpolation methodT。
6. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 5, it is characterised in that: the nitrogen, phosphorus, potash fertilizer push away
Recommend dosage NT、PT、KTRespectively refer to pure N, pure P2O5, pure amount K2O, corresponding fertilizer amount need to be carried out according to its nitrogen, phosphorus, potassium content
It calculates.
7. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 5, it is characterised in that: the target of the corn produces
Measure YMValue between nearest 3 three years maximum outputs and the 120% of nearest 3 three years maximum outputs.
8. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 5, it is characterised in that: the soil organism,
The measuring method of available phosphorus, quick-acting potassium content are as follows: determine 10-15 soil sample according to " S " the type method of layouting in target farmland
Point takes three parts of soil in the 20-40cm depth of each sample point and retains, measured respectively according to three parts of soil in the lab
Organic matter, available phosphorus, the quick-acting potassium content of each sample point obtain the organic of target farmland after being averaging to all sample points
Matter, available phosphorus, quick-acting potassium content.
9. the recommendation method of administration of corn nitrogen chemical fertilizer according to claim 5, it is characterised in that: nitrogen, phosphorus recommend ecological ring
Border comprehensive correction parameter CN、CPValue, be respectively 2,1 for Northwest Shandong Plain area, for the Hills And Low Mountains of east in Shandong Province point
Not Wei 2.5,0, for middle areas in Shandong Province hilly area be respectively 2.5,0.5, for the region of no relief of middle areas in Shandong Province the north be respectively
1.5,0.5, it is respectively 1.5,0.5 for the region of no relief of middle areas in Shandong Province south, respectively 2 for the salination area of east in Shandong Province north,
1.5；The Northwest Shandong Plain area corn recommended fertilizer retrieval table 2 established accordingly are as follows:
Table 2
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| CN110495293A (en) * | 2019-09-26 | 2019-11-26 | 山东省农业科学院农业资源与环境研究所 | A kind of fertilizing method in Huang-Huai-Hai Wheat Maize Rotation area |
| CN115049220A (en) * | 2022-05-25 | 2022-09-13 | 广东省科学院生态环境与土壤研究所 | Distributed regional nitrogen application amount estimation method, system, computer device and medium |
| US12026791B2 (en) | 2022-05-25 | 2024-07-02 | Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences | Method, system, computer equipment and medium for estimating nitrogen application amount in distributive regions |
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