Partitioned management method of soil nutrients

Abstract

The invention provides a partitioned management method of soil nutrients. The partitioned management method comprises the steps of carrying out spatial overlay analysis on a topographic map, a soil map, an administrative map, a distribution map of set crops in a surveyed area and a spatial rank distribution map of nutrients in the digitized surveyed area by adopting a spatial overlay method to generate a primary partitioned management map of soil nutrients of the set crops in the surveyed area; carrying out merging operation on pattern spots in the primary partitioned management map of the soil nutrients in accordance with a preset rule and a main soil property similarity principle to obtain a total partitioned management unit of more than one variety of soil nutrients; and calculating the fertilizing amount of soil nutrients required for normal growth of each set plant in the total partitioned management unit of various varieties of soil nutrients according to a target output method. The partitioned management method can be used for quantitatively describing soil properties and space change situations in a targeted manner and has an important meaning in terms of improving the fertilizer utilization efficiency in a farmland, improving field management and especially implementing 'precision agriculture' in China.

Description

technical field [0001] The invention belongs to the technical field of soil nutrient management in agricultural soil science, and in particular relates to a method for managing soil nutrient by division. Background technique [0002] Well-managed soil nutrients and reasonable fertilization are major technical issues related to the sustainable development of agriculture in our country. The status of soil nutrients directly affects the yield and quality of plant species. Therefore, it is the premise and foundation to promote the implementation of precision agriculture in my country to study the soil nutrient status and give reasonable fertilization suggestions according to the soil nutrient status. [0003] Soil nutrients have obvious spatial variation characteristics. In the prior art, traditional statistical methods are usually used to describe the spatial variation characteristics of soil nutrients, that is, researchers select a representative test site in the research are...

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Problems solved by technology

[0003] Soil nutrients have obvious spatial variation characteristics. In the prior art, traditional statistical methods are usually used to describe the spatial variation characteristics of soil nutrients, that is, researchers select a representative test site in the research area, and divide The test site is divided into several relatively uniform areas on the plane, and the spatial variability of soil nutrients is expressed by calculating the mean value and variance of the samples, but this method only considers the strength of the degree of variation, which is basically a qualitative description and is difficult to quantify Describe soil properties and their spatial variation

At the same time, it is impossible to estimate the soil property values ​​in unsampled areas, and can only be replaced by the average value of the whole area, which eventually leads to the problem of inaccurate soil nutrient analysis

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