Quantitative nitrogen application method based on soil rapid available nitrogen/rapid available phosphorus

Abstract

The invention relates to the technical field of crop fertilization, in particular to a quantitative nitrogen application method based on soil rapid available nitrogen / rapid available phosphorus. According to the method, nitrogen application quantity is determined by building a fertilization model based on nutrient conversion rate. The nitrogen application model is determined by the mode: (1) determining nitrogen conversion rate; (2) determining nitrogen application quantity regulating proportions ad1 and ad2 of a land parcel; (3) determining the ecological and economical nitrogen application model. According to the quantitative nitrogen application method based on soil rapid available nitrogen / rapid available phosphorus, the optimal nitrogen application quantity of an area and the land parcel can be determined only according to area high-yield soil available nitrogen / available phosphorus proportions and soil nitrogen content, quantitative fertilization is simple and practical, nitrogencan be quantitatively applied according to the area or the 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 quantitative nitrogen fertilization method based on soil available nitrogen / available phosphorus. 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 growth period of the crop. It is called the nutritional diagnosis method. The third type is more suitable for topdressing. . [0003] The first and second types of models are the main fertilization models, in which the apparent utilization rate of fertilizers and soil nutrients ...

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