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Rainfall-based area potassium topdressing method

A precipitation and regional technology, applied in the field of regional potassium follow-up based on precipitation, can solve the problems of easy nitrogen loss and low effectiveness, and achieve the effects of fertilizing soil, reducing non-point source pollution of fertilizers, and increasing the economic benefits of fertilization.

Active Publication Date: 2018-12-25
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

[0029] This embodiment provides a method for regional potassium recovery based on precipitation, including the following method S1 to determine the potassium application model based on nutrient conversion rate and determine the amount of potassium application,

[0030] The specific method for determining the potassium application model is as follows:

[0031] S101 Determine Potassium Conversion Rate

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

[0033] K yield is the potassium conversion rate; W yield The amount of potassium taken away by the plot yield of the optimal fertilization rate in the fertilizer field test, W input is the amount of potassium applied in the optimal fertilizer amount plot of 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 gra...

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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 potassium topdressing method which includes the steps: (1) determining a potassium application model based on potassium conversion rate and determining potassium application quantity according to the potassium application model; (2) determining a potassium topdressing adjustment model according to the potassium application quantity. According to the rainfall-based area potassium topdressing method, a potassium topdressing model according to rainfall is further built based on building of an area potassium application model and land parcel soil potassium content, and quantitative fertilization is simple and practical. Potassium can be quantitatively applied according to an area or landparcel, 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 potassium recovery 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 important ...

Claims

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Application Information

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Patent Type & Authority Applications(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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