County-level crop resource utilization and environmental effect evaluation method and system

Abstract

The invention provides a county-level crop resource utilization and environmental effect evaluation method and system. The method comprises the steps: determining a research region of county-level crops, and obtaining the parameter data of the research region; obtaining a calculation result of resource utilization evaluation indexes according to the parameter data of the research region, wherein the resource utilization evaluation indexes comprise a nitrogen fertilizer resource utilization index and a water resource utilization index; obtaining a calculation result of environmental effect evaluation indexes according to the parameter data of the research region, wherein the environmental effect evaluation indexes comprise greenhouse gas emission and grey water footprints; and spatializing the calculation result of the resource utilization evaluation indexes and the calculation result of the environmental effect evaluation indexes, and performing evaluation through a spatial distribution result. According to the method, the resource environment effect evaluation method suitable for the county scale is constructed, the evaluation result is subjected to regional spatialization, the resource environment problem caused by agricultural production is systematically evaluated, and the spatial distribution of water and fertilizer resource utilization and the environment effect is clarified.

Description

technical field [0001] The invention belongs to the technical field of agricultural resource environment evaluation, and specifically relates to a method and system for evaluating crop resource utilization and environmental effects at the county level. Background technique [0002] Water and fertilizer resources are considered to be an important factor affecting global food production. Previous studies have shown that there are spatial differences in the resource use and environmental effects of global crop production. Due to the complexity of the evaluation of resource and environmental effects, the current methods for evaluating the environmental effects of agricultural resources on the point scale are mainly based on experimental observations. Taking the greenhouse gas emission of rice as an example, the greenhouse gas emission mainly comes from nitrogen oxide emission and CH 4 emission. Among them, nitrogen emission occurs when nitrogen application exceeds rice demand...

AI Technical Summary

Problems solved by technology

First, the current agricultural experiment site monitoring research focuses on indicators related to the resource and environmental effects of major food crops (such as rice, wheat, and corn, etc.), and there is a lack of research on the resource and environmental effects of economic crops (such as vegetables, orchards, tea gardens, etc.)

Second, it is difficult to accurately assess the spatial distribution of resource and environmental effects in non-experimental fields based only on the monitoring data of the experimental sites.

Third, since it is difficult to directly obtain the fertilizer application data of different food crops, vegetables, orchards, and tea gardens at the county level, it is difficult to fully consider crop production input factors in the construction of resource and environmental effect assessment indicators. Therefore, the spatial resolution of the assessment indicators Most of the research units are at the provincial level, which cannot reflect the spatial differences in the evaluation results of crop resource use efficiency and environmental effects at the county level.

Images