水土保持通报2024，Vol.44Issue(3)：252-262,11.DOI:10.13961/j.cnki.stbctb.2024.03.026
2000-2020年广东省耕地面积与粮食生产的时空演变特征
Spatiotemporal Evolution Characteristics of Cropland Area and Grain Production in Guangdong Province During 2000-2020
摘要
Abstract
[Objective]The temporal and spatial evolution characteristics of cropland area and grain prodution was determined in Guangdong Province,in order to provide scientific references for the formulation and implementation of policies regarding cropland protection and food security in the region.[Methods]The methods of change intensity index,center of gravity migration trajectory,and sensitivity analysis model of cropland and grain yield were used to determine the spatial and temporal change characteristics of cropland area and grain yield,and the sensitivity degree of grain yield to cropland area changes at the county scale in Guangdong Province from 2000 to 2020.[Results]① 88.71％of the counties in Guangdong Province experienced a decrease in cropland area from 2000 to 2020.The counties with decreasing trends in cropland area developed from a concentrated distribution in the Pearl River delta region to a contiguous distribution throughout the entire province.② 78.23％of the counties had a decrease in grain yield,and counties with significant decreases in grain production were mainly concentrated in the Pearl River delta region.③ The centers of gravity of cropland area and grain yield both showed movement trends of"southward and westward".The contribution of cropland area and grain yield in Western Guangdong Province played increasingly important roles in Guangdong Province.④ The number of counties where grain yield was sensitive to changes in cropland area gradually increased over time,and the sensitive counties were increasingly concentrated in the Pearl River delta region and Eastern and Northern Guangdong Province.[Conclusion]Cropland area and grain yield in Guangdong Province had been decreasing over time,and the regions where grain yield were sensitive to changes in cropland area had been continuously expanding.These results suggest that Guangdong Province should focus on the temporal and spatial changes of cropland area and grain production for policy formulation.Based on changes in grain production,more attention should be paid to regions with higher grain yields.However,classified measures should be implemented to protect cropland,monitor grain production,and increase enthusiasm for grain cultivation.关键词
耕地/粮食生产/敏感度模型/时空演变/广东省Key words
cropland/grain production/sensitivity modeling/spatial and temporal dynamics/Guangdong Province分类
管理科学引用本文复制引用
冯珊珊,张磊,刘序,胡韵菲..2000-2020年广东省耕地面积与粮食生产的时空演变特征[J].水土保持通报,2024,44(3):252-262,11.基金项目
广东省农业科学院创新基金产业专项项目"粤港澳大湾区都市现代农业发展研究(2023)"(202310) （2023）
广州市基础与应用基础研究项目"多源遥感数据支持下撂荒耕地高精度提取方法及其应用研究"(2023A04J0923) （2023A04J0923）
广东省农业科学院科技人才引进专项资金项目(R2022YJ-YB1002) （R2022YJ-YB1002）
广东省自然科学基金面上项目(2021A1515012218) （2021A1515012218）
