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A method for determining the amount of phosphorus fertilizer used based on land available phosphorus

A technology of effective phosphorus and usage amount, applied in fertilization methods, applications, fertilization devices, etc., can solve the problems of crop production cost reduction, easy under-application or excessive application, etc., and achieve the effect of reducing over-application or under-application of phosphorus fertilizer

Active Publication Date: 2021-07-02
INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to: in view of the above-mentioned phenomenon that most of the regions still use empirical fertilization, it is very easy to apply less or excessive fertilization in the actual application process, resulting in the problem of crop yield reduction or increased production cost. Phosphate fertilizer usage method

Method used

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  • A method for determining the amount of phosphorus fertilizer used based on land available phosphorus

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Effect test

Embodiment 1

[0025] A method for determining the amount of phosphorus fertilizer based on land available phosphorus, comprising the steps of:

[0026] Step 1: The method of determining the soil phosphorus level is as follows: select the soil with more than 5 gradients that widely represent the soil phosphorus level, set up field experiments of fertilizer effects with different phosphorus fertilizer dosages, and fit the crop yield and soil Olsen -P relationship, determine the agronomic threshold of soil phosphorus, and use the soil agronomic threshold as the standard, compare the quantitative relationship between the undetermined soil Olsen-P content and the agronomic threshold, judge the level of soil phosphorus, and divide the land into deficient according to the level of soil phosphorus Phosphorus area, suitable area and high phosphorus area, according to the relationship between soil phosphorus input and crop output, determine the soil surplus rate K in the current season, and choose Wen...

Embodiment 2

[0032] A method for determining the amount of phosphorus fertilizer based on land available phosphorus, comprising the steps of:

[0033] Step 1: The method of determining the soil phosphorus level is as follows: select the soil with more than 5 gradients that widely represent the soil phosphorus level, set up field experiments of fertilizer effects with different phosphorus fertilizer dosages, and fit the crop yield and soil Olsen -P relationship, determine the agronomic threshold of soil phosphorus, and use the soil agronomic threshold as the standard, compare the quantitative relationship between the undetermined soil Olsen-P content and the agronomic threshold, judge the level of soil phosphorus, and divide the land into deficient according to the level of soil phosphorus Phosphorus area, suitable area and high phosphorus area, according to the relationship between soil phosphorus input and crop output, determine the soil surplus rate K in the current season, and choose the...

Embodiment 3

[0039] A method for determining the amount of phosphorus fertilizer based on land available phosphorus, comprising the steps of:

[0040] Step 1: The method of determining the soil phosphorus level is as follows: select the soil with more than 5 gradients that widely represent the soil phosphorus level, set up field experiments of fertilizer effects with different phosphorus fertilizer dosages, and fit the crop yield and soil Olsen -P relationship, determine the agronomic threshold of soil phosphorus, and use the soil agronomic threshold as the standard, compare the quantitative relationship between the undetermined soil Olsen-P content and the agronomic threshold, judge the level of soil phosphorus, and divide the land into deficient according to the level of soil phosphorus Phosphorus area, suitable area and high phosphorus area, according to the relationship between soil phosphorus input and crop output, determine the soil surplus rate K in the current season, and choose Xia...

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Abstract

The invention discloses a method for determining the use amount of phosphorus fertilizer based on available phosphorus in the land, which includes the following steps: Step 1: divide the land into phosphorus-deficient areas, suitable areas and high-phosphorus areas according to the level of soil phosphorus, and then determine the land phosphorus in the current season Surplus rate K; Step 2: Obtain the phosphorus requirement C of different crops through long-term monitoring and research and the formula of available phosphorus soil productivity is Y Olsen‑P ;Step 3: Establish correction coefficient A according to different soil textures; Step 4: According to wheat yield target Y t build model I P =C×(Y t -Y Olsen‑P )×(1+K)×A. By establishing a phosphate fertilizer variable fertilization model and using the phosphorus big data platform, a phosphate fertilizer recommendation system based on available phosphorus levels was developed to achieve precise phosphorus application. The present invention can apply phosphorus in a variable amount, and the phosphorus application amount can be accurate to 0.5kg / mu, which reduces the situation of applying more or less phosphorus fertilizer, and enables stable production of crops.

Description

technical field [0001] The invention relates to the field of phosphate fertilizer application, in particular to a method for determining the amount of phosphate fertilizer used based on land available phosphorus. Background technique [0002] According to the second national soil census, the total area of ​​cultivated land in the country is only 1.827 billion mu, of which only 21% are high-quality cultivated land, 10% are cultivated land with soil organic matter below 0.5%, 59% are phosphorus-deficient land, and 50% are potassium-deficient land. 23%, phosphorus and potassium deficiency accounted for 10%. Empirical fertilization is still used in most areas of my country, and the accuracy of fertilization is not high enough. Under the influence of factors such as phosphate fertilizer prices and agricultural product prices, it is very easy to under- or over-apply in the actual application process, resulting in problems such as crop yield reduction or increase in production cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00
Inventor 黄绍敏郭斗斗徐明岗张水清宋晓张珂珂岳克王柏寒
Owner INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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