Water-consuming crop planting layout optimization method and device

Abstract

The invention discloses a water-consuming crop planting layout optimization method and device. The method comprises the steps of: carrying out grid division on a target region, acquiring potential per unit yield and suitable planting area data of water-consuming crops on each grid unit, actual evapotranspiration of the water-consuming crops under irrigation water demand and water stress, and actual planting proportion, planting area and actual per unit yield under irrigation and rain-fed planting conditions; obtaining the cultivated area, the irrigation area and the sustainable irrigation water amount of each grid unit in a target area; obtaining the actually available total water resource amount of the water-consuming crops based on the rainfall capacity and the sustainable irrigation water amount of the target area, and obtaining the potential per unit yield level of the water-consuming crops under the available total water resource amount based on the available total water resource amount; and with the highest potential total yield of the water-consuming crops in the target area as an optimization target, performing layout optimization based on a predetermined constraint condition and the data to obtain an optimized planting area of the water-consuming crops so as to realize sustainable development of a resource 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

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