Model for optimizing nitrogen application rate of potato fields by drip irrigation in the north foot of Yinshan Mountain, Inner Mongolia, and applications thereof

A technology for optimizing model and nitrogen application rate, applied in the application, fertilization device, fertilization method, etc., can solve the problems of reduction, fertilization period, unreasonable dosage, etc., to achieve high-efficiency allocation, achieve production and environmental protection. The effect of sustainable development and reduction of farmers' traditional nitrogen application rate

Active Publication Date: 2020-04-14
INNER MONGOLIA AGRICULTURAL UNIVERSITY +1
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Problems solved by technology

[0004] Aiming at the excessive application of nitrogen fertilizer, unreasonable fertilization period, and unreasonable dosage in the potato planting area at the northern foot of Yinshan Mountain in Inner Mongolia, the present invention proposes a nitrogen balance-based nitrogen application optimization model, and applies the model and nitrogen absorption during the potato growth process Regular nitrogen fertilizer application method; this method not only reduces the traditional nitrogen application amount of farmers, but also adjusts the periodical fertilization time, frequency and amount according to the potato nitrogen absorption law while ensuring that the potato yield does not decrease or even slightly increases. Optimized; optimize the amount of nitrogen fertilizer used in potato fields through total amount control and stage allocation, while improving the efficient allocation of nitrogen resources, it has realized agricultural green and sustainable development that pays equal attention to production and environmental protection

Method used

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  • Model for optimizing nitrogen application rate of potato fields by drip irrigation in the north foot of Yinshan Mountain, Inner Mongolia, and applications thereof
  • Model for optimizing nitrogen application rate of potato fields by drip irrigation in the north foot of Yinshan Mountain, Inner Mongolia, and applications thereof
  • Model for optimizing nitrogen application rate of potato fields by drip irrigation in the north foot of Yinshan Mountain, Inner Mongolia, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In May 2017, the No. 1 test field was tested. The No. 1 test field covers an area of ​​200 mu. Combined with the past years of planting experience, the potato production in this planting area is 2500kg / mu, and the previous nitrogen application rate is 280kgNha -1 , so the target yield is determined to be 2500kg / mu, and the yield per hectare is 37500kg;

[0058] Apply the formula to calculate the optimal nitrogen application rate (that is, the amount of fertilizer applied throughout the potato growth period):

[0059] X1=5×37500÷1000+18-X3,

[0060] Among them, NO in the 0-30cm and 30-60cm soil before sowing 3 - The sum of the mean values ​​of -N measured content is 32, then the effective value of X3 is figure 2 In the calculation method, subtract 26 to get 6; through the calculation, X1 can be 199.5, take 200;

[0061] Use urea as nitrogen fertilizer, according to Figure 9 Fertilize at the times and amounts indicated.

Embodiment 2

[0063] In May 2018, the experiment was carried out on the No. 2 test field. The No. 2 test field covers an area of ​​200 mu. Combined with the past years of planting experience, the potato yield in this planting area is 3000kg / mu, and the previous nitrogen application rate is 340kgNha -1 , so the target yield is determined to be 3000kg / mu, and the yield per hectare is 45000kg;

[0064] Apply the formula to calculate the optimal nitrogen application rate (that is, the amount of fertilizer applied throughout the potato growth period):

[0065] X1=5×45000÷1000+18-X3,

[0066] Among them, NO3 in the 0-30cm and 30-60cm soil before sowing - The sum of the mean values ​​of -N measured content is 36, then the effective value of X3 is figure 2 In the calculation method, subtract 26 to get 10, and X1 can be calculated as 233;

[0067] Use urea as nitrogen fertilizer, according to Figure 10 Fertilize at the times and amounts indicated.

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Abstract

The invention discloses a model for optimizing the nitrogen application rate of potato fields by drip irrigation in the north foot of Yinshan Mountain, Inner Mongolia, and applications thereof. Nitrogen balance based nitrogen application rate optimizing model and a nitrogen fertilizer using amount optimizing and application method applying the model and nitrogen absorption law during potato growing are included. The method can reduce the traditional nitrogen application rate of farmers under the circumstance of guaranteeing that the yield of potatoes does not reduce but even slightly increases, and optimizes stage fertilization time, times and using amount according to the nitrogen absorption law of the potatoes; and through total quantity control, a stage allocation mode can optimize thenitrogen fertilizer using amount of potato fields, so that the green sustainable development of agriculture with equal emphasis on production and environmental protection can be realized while the efficient configuration of nitrogen resources is enhanced.

Description

technical field [0001] The invention belongs to the technical field of crop fertilization, relates to the management technology of scientific nitrogen fertilizer application in potato fields, and particularly relates to an optimization model and application of nitrogen application amount in drip irrigation potato fields at the northern foot of Yinshan Mountain in Inner Mongolia, and provides a nitrogen application amount optimization model based on nitrogen balance, and Applying the model and the nitrogen uptake law in the potato growth process to optimize the application method of nitrogen fertilizer amount. Background technique [0002] my country is the country with the largest potato planting area and output in the world. Among the many potato planting provinces in my country, Inner Mongolia Autonomous Region is an important part of my country's potato industry; the farmland at the northern foot of Yinshan Mountain is the main potato planting area in Inner Mongolia Autono...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 李斐杨海波赵世翔张加康
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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