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A Regional Nitrogen Tracking Method Based on Precipitation

A technology of precipitation and nitrogen topdressing, applied in fertilization methods, fertilization devices, agriculture, etc., can solve the problems of easy nitrogen loss and low effectiveness, achieve the goal of fertilizing soil, reducing fertilizer non-point source pollution, and increasing fertilization economic benefits Effect

Active Publication Date: 2020-12-15
GUANGXI TEACHERS EDUCATION UNIV
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AI Technical Summary

Problems solved by technology

Nitrogen is easily lost in the soil (volatilization and seepage, etc.); phosphorus is easily fixed in the soil, and the availability is low; generally, the soil provides more potassium, and fertilizer potassium is also fixed to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] This embodiment provides a regional nitrogen recovery method based on precipitation, including the following methods

[0029] S1 Determine the nitrogen application model based on the nitrogen conversion rate and determine the nitrogen application rate

[0030] The specific method to determine the nitrogen application model is as follows:

[0031] S101 Determine nitrogen conversion rate

[0032] K yield =W yield / W input ,

[0033] K yield is the nitrogen conversion rate; W yield The amount of nitrogen taken away by the yield of plots with the best fertilization rate in the fertilizer field test, W input is the nitrogen application rate of the best fertilization rate plot in the fertilizer field test;

[0034] The yield of the plot with the optimal amount of fertilizer application refers to the plot with the highest yield among the 14 plots in the "3414 Fertilizer Field Test". The amount of nutrients in the grain, which is equal to the weight of the grain (dry w...

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PUM

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Abstract

The invention relates to the technical field of crop fertilization, in particular to a rainfall-based area nitrogen topdressing method which includes the steps: (1) determining a nitrogen applicationmodel based on nitrogen conversion rate and determining nitrogen application quantity according to the nitrogen application model; (2) determining a nitrogen topdressing adjustment model according tothe nitrogen application quantity. According to the rainfall-based area nitrogen topdressing method, a nitrogen topdressing model according to rainfall is further built based on building of an area nitrogen application model and land parcel soil nitrogen content, and quantitative fertilization is simple and practical. Nitrogen can be quantitatively applied according to an area or land parcel, on the premise of ensuring per unit yield and quality, fertilization economic benefits and fertilizer increasing soil are increased, and fertilizer non-point source pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of crop fertilization, in particular to a precipitation-based regional nitrogen topdressing method. Background technique [0002] At present, there are three main types of quantitative fertilization models: one is the model based on the soil nutrient content to calculate the recommended fertilization amount, which is called the soil test recommended fertilization model; The best recommended fertilization amount is called the fertilizer effect function model. The third type is to determine the recommended fertilization plan at that time by measuring the nutrient content in the leaves during the growing period of the crop. It is called the nutritional diagnosis method. The third type is more suitable for nitrogen topdressing. Condition. [0003] The first and second types of models are the main fertilization models, in which the apparent utilization rate of fertilizers and soil nutrients are the most importan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 侯彦林侯显达王铄今刘书田贾书刚
Owner GUANGXI TEACHERS EDUCATION UNIV
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