Meshed field crop base fertilizer application effect evaluation model

Abstract

The invention relates to the field of intelligent agriculture, in particular to a meshed field crop base fertilizer application effect evaluation model which is composed of a soil testing and fertilization model, a mesh dividing model and a fertilization effect evaluation model, wherein the soil testing and fertilization model is a fertilizer preparation algorithm model of fertilizers such as nitrogen, phosphorus, potassium, medium trace elements and the like according to the fertilizer demand of crops, the fertilizer supply capacity of soil and the fertilizer effect on the basis of soil detection and field tests; the mesh dividing model is a land mesh model in which soil nutrient content is used as a parameter, and the mesh dividing model is used for performing mesh dividing on soil according to soil census, cultivated land fertility survey or local field test data; and the fertilization effect evaluation model is a model for performing grade evaluation on the final actual base fertilizer fertilization effect of the whole target plot by performing result comparison with the optimal fertilization amount provided by the soil testing and fertilization model in each mesh and taking the area proportion of each mesh as a weight.

Description

technical field [0001] The invention relates to the field of smart agriculture, more specifically, a gridded model for evaluating the fertilization effect of field crop basal fertilizer. Background technique [0002] my country is a large agricultural country, and the development of the agricultural industry is directly related to the development of the overall economy of our country. At present, in the process of agricultural planting and production, there are obvious problems such as unreasonable fertilization, abuse of chemical fertilizers, and backward fertilization technology. Damage to agricultural land, pollution of the farmland environment, and hidden dangers of food security have also seriously affected the stability of agricultural production. According to different stages, fertilization methods can be divided into two types: base fertilizer and top dressing. Among them, base fertilizer mainly supplies the nutrients needed by plants throughout the growth period, cre...

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Problems solved by technology

[0003] At present, the commonly used evaluation method of basal fertilizer application effect is crop growth NDVI value analysis method, which is a method of extracting NDVI value of leaves during crop growth, analyzing crop growth status, and then reflecting the effect of basal fertilizer application. A hysteresis evaluation method based on crop growth and health feedback. The essence of this method is to indirectly feed back the effect of base fertilizer application through crop growth status. The evaluation accuracy is poor, which affects the decision-making of subsequent topdressing fertilizer usage, which in turn affects crop growth and reduces crop yield.

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