Variable NPK (nitrogen, phosphorus and potassium) fertilizer applicator and method for determining fertilizing formulation

Abstract

The invention discloses a variable NPK (nitrogen, phosphorus and potassium) fertilizer applicator and a method for determining a fertilizing formulation. The variable NPK fertilizer applicator comprises a tractor and a fertilizing system hung behind the tractor, wherein the fertilizing system comprises a fertilizer tank, a fertilizer discharge control mechanism and a GPS positioning system; the fertilizer discharge control mechanism is connected with the GPS positioning system and the fertilizer tank respectively to achieve variable fertilizer application; the fertilizer discharge control mechanism performs variable fertilizer application according to the fertilizing formulation. The method for determining the fertilizing formulation comprises the following steps: determining the sampling density of a sampling point and determining the available nutrient content at the sampling point; determining the fertilizing amount at the sampling point according to nutrient demand of crops as well as the determined available nutrient content; with the combination of the sampling density of the sampling point and the fertilizing amount at the sampling point, performing spatial interpolation analysis to generate a fertilizing formulation map for the sampling point.

Description

technical field [0001] The invention relates to precision agricultural variable fertilization technology, in particular to a nitrogen, phosphorus and potassium variable fertilization machine capable of realizing the decision-making of the fertilization amount of three kinds of fertilizers such as urea, diammonium phosphate and potassium sulfate, and a method for determining the operating prescription of the fertilization amount. Background technique [0002] There have been many studies and applications of variable fertilization technology abroad. In the United States, relevant information such as soil type, soil texture, soil nutrient content, fertilization and yield over the years have been input into the computer, forming a soil nutrient and fertilizer information system with complete data. Japan has conducted research on the implementation of variable nitrogen fertilizers. The rice field variable fertilizer applicator manufactured by Hatsuta Industries is map-based and c...

AI Technical Summary

Problems solved by technology

[0004] At present, there are problems in fertilization in my country such as low utilization rate of chemical fertilizers, imbalance of nitrogen, phosphorus, potassium and trace elements, and serious agricultural environmental pollution.

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