2000-2020年"一江两河"地区耕地集约利用变化OA北大核心CSTPCD

Farmland use intensity is an important factor to improve food production,alleviate the conflict be-tween humans and land,and achieve sustainable agricultural development.Based on the farmland data obtained from high spatial resolution remote sensing images,this paper explores the farmland use intensity and its driving mechanism in the Yarlung Zangbo-Lhasa-Nyangqu River(YLN)region in 2000 and 2020 through a comprehen-sive evaluation index model.The results show that:(1)the degree of farmland use intensity in the YLN region has increased in the past 20 years,but the overall level is low.The farmland use intensity in 2020 was 38.2%high-er than in 2000,which is mainly attributable to the increase in agricultural input,technological input,and the ex-ploitation and utilization level.(2)There is a large difference in the change in farmland use intensity among differ-ent districts and counties;the high intensity areas migrated from east to west and increased in scope.The differ-ence in farmland use intensity between east and west regions narrowed,and the number of low intensity districts and counties decreased.(3)The irrigation index,proportion of farmland area,and farmland quality have the most significant independent effects on the degree of farmland use intensity in the YLN,whereas socioeconomic fac-tors,agricultural science and technology factors,and policy and environment factors interact with farmland re-source endowment to increase the degree of impact on the farmland use intensity.Based on the above results,the following policy recommendations are proposed:the continuous promotion of agricultural science and technolo-gy innovation in the YLN region with a focus on regional differences,to realize sustainable development in high intensity areas and total factor inputs in low intensity areas,and facilitate the synergistic effects of agricultural policy and economy to coordinate and promote enhanced farmland use intensity in the YLN region.