Soil layering characteristic acquiring method and application

Abstract

The invention discloses a soil layering characteristic acquiring method and an application and belongs to the technical field of agricultural irrigation. The method comprises the steps as follows: the depth of a crop root system main distribution layer is determined according to the type of to-be-planted crops in a farmland management area; sampling points are set in the management area and irrigated, so that the soil at the depth of the crop root system main distribution layer absorbs water to be saturated; the deep layer seepage of soil below the crop root system main distribution layer is acquired, and when the deep layer seepage approximates the threshold, the soil moisture contents of the sampling points at different depth layers are measured; the soil texture of the sampling points at different depth layers is acquired and the soil layering characteristic of the management area is obtained. The layering characteristic of the vertical section of soil has obvious influences on soil moisture movement, the burying positions of soil moisture sensors can be more effectively determined if the layering characteristic is considered, and the layering characteristic has great significance in guiding farmland irrigation efficiently.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, in particular to a soil stratification feature acquisition method and its application. Background technique [0002] At present, soil moisture sensors are mostly buried in the soil to measure the soil moisture content, which is used to guide farmland irrigation. For different types of crops and different types of soil, in order to obtain true and effective soil moisture content data, it is necessary to determine the appropriate embedding position of the soil moisture sensor. [0003] The prior art (CN104569342A) divides the target field into management areas with different water supply capabilities by obtaining the available water in the soil, and then determines whether the soil moisture sensor is suitable in the horizontal direction according to the degree of dependence of the crop on water and the area ratio of each management area. the buried position. Among them, when obtai...

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Problems solved by technology

[0005] The stratification characteristics of the vertical soil profile have a significant impact on soil moisture migration. However, the existing technology does not consider the stratification characteristics of the vertical soil profile when obtaining the available water in the soil. The prior art determines the embedding position of the soil moisture sensor including the situation that it is buried below the interlayer. At this time, the soil moisture sensor below the interlayer is ineffective for guiding farmland irrigation.

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