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Crop coefficient estimation method based on crop stress index

A technology of crops and coefficients, applied in the field of agricultural science and technology, can solve problems such as sufficient water supply, and achieve the effect of highlighting substantive characteristics, easy application, and simple form

Inactive Publication Date: 2017-05-31
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for estimating crop coefficient based on crop stress index, which mainly solves the problem that sufficient water supply is required for determining the crop coefficient in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1, set up test plots for specific crops, and adopt local conventional irrigation methods to carry out different irrigation water supply treatments, wherein the soil moisture content (irrigation threshold) of the root layer before irrigation under low water treatment is 40% of the field water capacity ±5%, the soil moisture content of the root layer before irrigation (threshold value for irrigation) treated with reclaimed water is 55%±5% of the field water capacity, and the soil moisture content (threshold value) of the root layer before irrigation for high water treatment is 55%±5% of the field capacity. 70% ± 5% of the water volume, and the sub-irrigation water volume of each treatment should meet the requirements of the soil moisture content of the root layer after irrigation to meet the field water holding capacity, and the irrigation method should be the conventional method in the area; use automatic weather stations and other equipment in the test field Obse...

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PUM

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Abstract

The invention discloses a crop coefficient estimation method based on crop stress index. According to the estimation method, a crop water stress index (CWSI) and a crop coefficient (Kc) calculation formula are combined to obtain a theoretical model that utilizes a practical crop evapotranspiration (Eta) and CWSI to estimate Kc. The method has the advantages that the Eta data is easy to obtain; the sufficient water supply condition, which is required in conventional crop coefficient calculation, is not needed; and the whole calculation of crop coefficient is simplified.

Description

[0001] Technical field: [0002] The invention relates to the technical field of agricultural science and technology, in particular to a crop coefficient estimation method based on crop stress index. [0003] Background technique: [0004] Crop water requirement refers to the total amount of water required for crop leaf transpiration, soil evaporation between trees, composition of crop bodies, and consumption in photosynthesis and other physiological processes under the condition of crops reaching high yield potential. The two parts of leaf transpiration and soil evaporation between trees are collectively referred to as crop evapotranspiration, and crop evapotranspiration is generally used to represent the water demand of crops. Crop water consumption refers to the actual water consumption, including leaf transpiration, inter-tree evaporation, and deep seepage. The research on crop water requirement and its changing law has always been valued by scholars at home and abroad, an...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N33/00
CPCG01N33/0098G01N33/246G01N33/245
Inventor 张振华杨润亚于君宝何福红潘英华
Owner LUDONG UNIVERSITY
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