Field crop drought judgment method

A field crop and drought technology, applied in the fields of instruments, climate change adaptation, data processing applications, etc., can solve the problem of no growth stage considering the appropriate soil wet layer depth for crop growth, lack of a method for judging whether crops are affected by drought, and lack of reasonable utilization. Crop moisture content and other issues, to achieve the effect of accurate judgment and scientific results

Inactive Publication Date: 2018-02-02
ANHUI AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0009] 1. Most of the drought judgments are aimed at large-scale overall areas, and there is a lack of methods for judging whether a certain crop is drought-affected in a small-scale area
[0010] 2. The soil moisture content of several fixed soil moisture layer depths is generally used as the discriminant index, and the soil moisture layer depth suitable for the actual growth of crops is not considered according to the crop variety and growth stage
[0011] 3. The current drought evaluation rules do not make reasonable use of crop moisture content

Method used

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Embodiment Construction

[0031] In this embodiment, taking wheat along the Huaibei region as an example to illustrate the specific implementation steps of drought discrimination, as follows figure 1 As shown, a method for judging the drought situation of field crops is carried out as follows:

[0032] Step 1: Determine the soil moisture layer depth H (unit cm) according to the planting area, crop variety and growth stage, and detect the soil moisture content ω (unit %) of the soil moisture layer depth H. Table 1 shows the main growth stages of wheat and soil Depth correspondence; taking wheat at the tillering stage as an example, it is necessary to measure the soil volumetric moisture content at 45cm.

[0033] Table 1 Wheat growth stages and soil moisture layer depth along Huaibei area

[0034]

[0035] Step 2: According to the soil moisture content ω and the upper limit value ω of soil moisture content in the growth stage max and the lower limit ω min , as shown in Table 2, the upper limit ω of...

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Abstract

The invention discloses a field crop drought judgment method, which comprises the steps of 1 determining the depth of a soil moist layer and detecting the soil moisture content; 2 acquiring a droughtindicating parameter and a waterlogging indicating parameter; 3 acquiring a crop water requirement factor; 4 building a drought judgment function; and 5 acquiring a drought condition of the field cropin the planting area according to a value of the drought judgment function. The field crop drought judgment method comprehensively integrates influences imposed on drought judgment by crop information, the soil moisture content and the crop leaf water content so as to enable the judgment result to be more reasonable and more accurate.

Description

technical field [0001] The invention relates to the field of agricultural drought monitoring and early warning, in particular to a drought discrimination method for field crops, which is applicable to the drought evaluation index and classification of dry crops such as wheat and corn. Background technique [0002] The drought discrimination of field crops is an important basis for irrigation, water saving and high-quality and high-yield. Therefore, my country clearly proposes that "soil monitoring technology should be improved; drought evaluation index research should be strengthened". [0003] Among related technologies, the patent ("Wang Dongmei, Huang Junyou, Bao Yansong, etc. Remote sensing monitoring method for agricultural drought based on MODIS data: China: CN103994976A.2014.08.20") uses remote sensing to monitor changes in soil moisture, and does not distinguish crops in the inversion model Variety differences, but this model fails to divide the drought level of diff...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02
CPCG06Q50/02Y02A10/40
Inventor 江朝晖缪振兴马友华高正宝
Owner ANHUI AGRICULTURAL UNIVERSITY
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