A crop yield prediction method considering water and salt stress

A technology for crop yield and comprehensive consideration, applied in the field of crop yield prediction that comprehensively considers water and salt stress, and can solve problems such as complex application

Active Publication Date: 2019-02-15
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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Problems solved by technology

[0005] These independent prediction methods are difficult to directly and accurately predict the yield of crops affected by multiple stresses at the same time, and if the simple superposition of multiple stresses is used to predict crop yield, the actual application is extremely complicated

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  • A crop yield prediction method considering water and salt stress
  • A crop yield prediction method considering water and salt stress
  • A crop yield prediction method considering water and salt stress

Examples

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Embodiment 1

[0066] This embodiment provides a crop yield prediction method that comprehensively considers water and salt stress, and is used to predict the actual yield of a certain type of crop. The specific flow chart is as follows figure 1 shown.

[0067] The crop yield prediction method comprehensively considering water and salt stress provided in this example can be generally divided into two processes. The first process is to establish a relative yield ratio calculation model, and bring at least four groups of measured sampling values ​​into the relative yield ratio. In the calculation model, the values ​​of the four undetermined coefficients corresponding to the crop types in the relative yield ratio calculation model are obtained, and these four undetermined coefficients are the minimum soil water potential Ψ d , the maximum soil-water potential Ψ u , the stress compensation coefficient δ and the relative yield coefficient β; the second process is to use the determined values ​​o...

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Abstract

A method for predict crop yield comprehensively considering wat and salt stress The invention relates to the technical field of agricultural water and soil engineering, which is used for predicting the actual yield of a certain kind of crop. The method comprises the following steps: obtaining the water absorption distribution of the root system and the transpiration evapotranspiration of the aboveground part in each day of the growth period of the crop in the farmland to be predicted; Gets the minimum soil water potential corresponding to the category, maximum soil water potential, the value of stress compensation coefficient and relative yield coefficient, the predicted total stress index in the farmland to be predicted is obtained, Then, the predicted relative yield ratio of crops in thefarmland to be predicted is obtained, and the predicted actual yield of crops in the farmland to be predicted is obtained by multiplying the ideal yield ratio and the predicted relative yield ratio,so as to uniformly consider the effects of three kinds of stresses on crop yield, so that the precision of crop yield prediction is improved and the complexity of crop yield prediction is reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural water and soil engineering, in particular to a method for predicting crop yield comprehensively considering water and salt stress. Background technique [0002] Agricultural crops can achieve higher yields under suitable climate, soil and nutritional conditions, and environmental stress caused by different extreme environments can lead to different degrees of reduction in crop yields. At present, soil drought, waterlogging and high salinity are the main extreme environmental forms faced by agricultural production in my country. The interaction of the three extreme environmental forms seriously limits the increase of crop yield. [0003] In the prior art, in order to evaluate and improve crop yields, respective crop yield prediction methods have been established for the three stresses of drought, waterlogging and salinity. [0004] The inventor finds that there are at least the following prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/02
CPCG06Q10/04G06Q10/06315G06Q50/02
Inventor 焦平金伍靖伟
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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