Method and device for optimizing planting layout of water-consuming crops

Abstract

A method and device for optimizing the planting layout of water-consuming crops, wherein the method includes: gridding the target area, and obtaining data on the potential yield and suitable planting area, irrigation water demand and water stress of water-consuming crops on each grid unit The actual evapotranspiration of water-consuming crops under , as well as the actual planting ratio, planting area and actual per unit yield under irrigation and rain-fed planting conditions; obtain the cultivated land area and irrigated area of ​​each grid cell in the target area, and the sustainable irrigation water volume; Based on the rainfall and sustainable irrigation water in the target area, the actual total water resources available to water-consuming crops are obtained, and based on the total available water resources, the potential potential of water-consuming crops under the total available water resources is obtained. Yield level: with the highest potential total yield of water-consuming crops in the target area as the optimization goal, the layout is optimized based on predetermined constraints and the aforementioned data, and the optimized planting area of ​​water-consuming crops is obtained to achieve sustainable development of resources and the environment.

Description

technical field [0001] The invention belongs to the technical field of optimization and adjustment of planting layout, and in particular relates to a method and device for optimizing the planting layout of water-consuming crops. Background technique [0002] With the increase of my country's population and the growth of urbanization rate, the demand for food is gradually increasing. Irrigation is one of the key factors affecting crop yield. Some studies have pointed out that the irrigated area, which accounts for nearly 50% of the country's cultivated land, produces about 75% of the country's total grain and more than 90% of the country's total cash crops. The average grain yield per mu in irrigated areas reached 570 kg, 1.8 times the national average yield per mu, and 2.9 times the average yield per mu in dry land. However, while irrigation increases crop yields, it also causes excessive use of water resources. In areas with insufficient rainfall, farmers pump more groun...

AI Technical Summary

Problems solved by technology

However, in the existing research on optimal layout schemes, there are certain defects

First, few current studies have quantified the amount of water available for agricultural irrigation on a grid scale and applied it to the optimization of agricultural planting structures, etc.

Second, the current optimization research often regards reducing irrigation water demand as one of the optimization goals, ignoring the water constraints that can be continuously applied to agricultural irrigation in the grid cells in the target area, resulting in the water consumption of the optimized crop planting layout still exceeding Given the sustainable amount of water provided, the water table may still continue to decline

Images