Regional wheat fertilization rationality judging method based on hyperbolic index

Abstract

The invention discloses a regional wheat fertilization rationality judging method based on a hyperbolic index and belongs to the technical field of wheat fertilization judgment. The method comprises the steps as follows: A, establishment of wheat fertilization indexes: (1) selecting a plot and performing treatment of different nitrogen fertilizer application quantities; (2) establishing a fertilizer efficiency reaction equation about the wheat yield, and drawing a relation diagram of the nitrogen fertilizer application quantity and the wheat yield; (3) measuring and drawing a soil nitrate nitrogen distribution diagram of a 2 m deep soil layer after treatment of different nitrogen fertilizer application quantities, and performing measurement with every 20 cm as one layer; (4) fitting a quantitative relation equation of the nitrogen fertilizer application quantity and average nitrate nitrogen content of each soil layer at the depth of 1-2 m, and drawing a diagram; completing the wheat fertilization hyperbolic index; B, wheat fertilization rationality judgment: judging whether wheat fertilization is rational or not according to the wheat fertilization hyperbolic index. According to the method, whether fertilization by peasant households is rational or not can be judged and the fertilization quantity can be corrected according to judgment results.

Description

technical field [0001] The invention belongs to the technical field of wheat fertilization judgment, and relates to a method for judging the rationality of regional wheat fertilization based on a hyperbolic index. According to the method of the invention, it can be judged whether the fertilization by farmers is reasonable, and the amount of fertilization can be corrected according to the judgment result. Background technique [0002] my country's food production accounts for 16% of the world's total, and the amount of chemical fertilizers accounts for 31%. The amount per hectare is four times the world's average amount. Excessive chemical fertilizers, especially nitrogen, will become nitrate nitrogen and leaching into groundwater, polluting groundwater, affecting People are healthy. The above situation is estimated based on statistical results. But how much nitrogen fertilizer is applied to wheat in a region, whether it is reasonable, what is the situation of nitrate nitroge...

AI Technical Summary

Problems solved by technology

But how much nitrogen fertilizer is applied to wheat in a region, whether it is reasonable, what is the situation of nitrate nitrogen leaching, how much nitrogen fertilizer is used, and how much should be used. These key indicators are an important basis for rational fertilization in an area, but it is generally difficult to obtain these indicators.

[0003] The traditional fertilizer effect response equation method guides fertilization, only considers the change of grain yield with nitrogen fertilizer application, and does not know the impact of nitrogen fertilizer application on the environment

It is impossible to visually see the leaching of nitrate nitrogen in the soil under different fertilization conditions, and it is impossible to visually see the level of actual application amount in nitrate nitrogen leaching and yield, and it is impossible to intuitively judge whether it is reasonable

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