Recommended fertilizer applying method for purple paddy soil based on yield response and agronomic efficiency

Abstract

The invention belongs to the technical field of soil fertilizers, and discloses a recommended fertilizer applying method for purple paddy soil based on yield response and agronomic efficiency. The method comprises the following steps of S1, respectively calculating membership values of organic substances, total nitrogen, alkali-hydrolyzale nitrogen, effective phosphorus and rapidly available potassium by utilizing a semi-trapezoid membership function, calculating the membership value of pH (potential of hydrogen) value according to a trapezoidal membership function, determining a weight coefficient of each evaluation index based on a correlation coefficient analysis method, and calculating a comprehensive index value of soil fertility by adopting an index pulsing method according to the weight coefficient of each evaluation index and the corresponding membership value; S2, establishing a function model of the comprehensive index value of the soil fertility and the relative yield of rice, and establishing a function model of rice target yield and nitrogen fertilizer yield response; and S3, according to the recommending amount of a nitrogen fertilizer, the recommending amount of a phosphorus fertilizer and the recommending amount of a potassium fertilizer, determining ratios of a base fertilizer and an additional fertilizer. The method disclosed by the invention has the beneficial effects that the method is reliable, and the accuracy is relatively high.

Description

technical field [0001] The invention belongs to the technical field of soil fertilizers, and in particular relates to a recommended fertilization method for purple paddy soil based on yield response and agronomic efficiency. Background technique [0002] Reasonable fertilization can not only ensure high crop yield, but also an important measure to fertilize farmland soil. Scholars at home and abroad have proposed a recommended fertilization method based on above-ground crops. The nutrient expert system recommends fertilization using the QUEFTS model to clarify the nutrient intrinsic efficiency of crops. Based on the relationship between crop yield response and agronomic efficiency, the comprehensive fertilizer type, fertilizer amount, The recommended fertilization method is based on the principles of fertilization time and fertilization location. At present, the fertilization recommended by the nutrient expert system is widely used in field crops in my country, but the desi...

AI Technical Summary

Problems solved by technology

At present, the fertilization recommended by the nutrient expert system is widely used in field crops in my country, but the design of the fertilization expert system developed in various places is too professional and one-sided, and the parameter setting is too complicated, which is not convenient for users to operate and query, and is difficult to promote

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