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A method for optimizing crop water productivity in saline farmland

A technology for farmland crops and productivity, applied in data processing applications, instruments, complex mathematical operations, etc., can solve problems such as difficult direct measurement, complex measurement process, high professional basic knowledge requirements, etc., to achieve less measurement, simple and easy measurement, and reduce effect of difficulty

Active Publication Date: 2021-05-25
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for optimizing crop water productivity in saline farmland, which solves the problems in the prior art that the measurement process of the field test is relatively complicated or difficult to directly measure, and the numerical simulation model does not require professional basic knowledge of the user. Difficult to analyze and optimize crop water productivity due to high requirements

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  • A method for optimizing crop water productivity in saline farmland
  • A method for optimizing crop water productivity in saline farmland
  • A method for optimizing crop water productivity in saline farmland

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] The optimization method of the crop moisture productivity of a kind of saline farmland of the present invention, such as figure 1 shown. This embodiment is carried out in the salted cotton field of Baotou Lake Farm in Korla, Xinjiang, and the main steps are as follows:

[0041] Step 1: The leaching ratio of farmland salinity LF: The Korla region of Xinjiang lacks fresh water resources but the shallow brackish water is abundant, the soil has high salinity, and sufficient light and heat resources are suitable for planting cotton with strong salt tolerance, etc. crop. The multi-year average evapotranspiration of cotton fields in Baotou Lake Farm in Korla area is 500mm, and the commonly used irrigation water for local cotton fields is 526-588mm. The leaching ratio of salt in the cotton field is calculated by the following formula:

[0...

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Abstract

The invention discloses a method for optimizing the water productivity of crops in saline farmland, which comprises the following steps: 1: combining crop evapotranspiration, setting no less than 3 groups of irrigation and rinsing water volumes, and calculating the leaching ratio; 2: measuring irrigation water Conductance, salt tolerance threshold and yield reduction coefficient of crops, combined with the leaching ratio to determine the degree of yield reduction; 3: Analyze the unit water productivity of saline farmland crops according to the leaching ratio, evapotranspiration, and yield reduction degree; 4: Determine the leaching ratio of multiple groups According to the relationship between the unit water productivity of the corresponding saline farmland crops, three fitting coefficients are obtained; 5: Determine the maximum unit water productivity and the optimal leaching ratio of the saline farmland crops according to the fitting coefficients; 6: According to the best The rinse ratio determines the optimal irrigation rate. The invention reduces the difficulty of optimizing the water productivity of farmland crops, requires fewer parameters and is simple and easy to measure, thereby effectively saving the irrigation amount per unit area of ​​saline farmland and increasing crop yield.

Description

technical field [0001] The invention belongs to the technical field of agricultural water and soil engineering, and relates to a method for optimizing crop water productivity in saline farmland. Background technique [0002] With the rapid development of my country's economy and society, the demand for water resources in the whole society continues to increase, resulting in the occupation of irrigation water resources. The shortage of irrigation water resources has become a bottleneck restricting the sustainable development of agriculture in saline areas. Improving crop water productivity through various water-saving measures is the ultimate goal of efficient water-saving technology and sustainable agricultural development. Optimizing crop water productivity is of great significance to water resource utilization, management and decision-making in salinized areas. Clarifying the characteristics of crop water productivity changes in saline farmland can make targeted water res...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/02G06Q50/06G06F17/11
CPCG06F17/11G06Q10/06315G06Q50/02G06Q50/06
Inventor 宁松瑞周蓓蓓王全九
Owner XIAN UNIV OF TECH
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