生态退耕对中国农田生产力的影响(英文)

编号 zgly0001585248

文献类型 期刊论文

文献题名 生态退耕对中国农田生产力的影响(英文)

作者 秦元伟  闫慧敏  刘纪远  董金玮  陈静清  肖向明 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences  DepartmentsofMicrobiologyandPlantBotany  CenterforSpatialAnalysis  UniversityofOklahoma 

母体文献 Journal of Geographical Sciences 

年卷期 2013年03期

年份 2013 

分类号 F301.24  F205 

关键词 ecologicalrestoration  agriculturalproductivity  remotesensing  GrainforGreen  ReclaimedCroplandtoLake 

文摘内容 The changes in cropland quantity and quality due to land use are critical concerns to national food security, particularly for China. Despite the significant ecological effects, the ecological restoration program (ERP), started from 1999, has evidently altered the spatial patterns of China’s cropland and agricultural productivity. Based on cropland dynamic data from 2000 to 2008 primarily derived from satellite images with a 30-m resolution and satellite-based net primary productivity models, we identified the impacts on agricultural productivity caused by ERP, including Grain for Green Program (GFGP) and Reclaimed Cropland to Lake (RCTL) Program. Our results indicated that the agricultural productivity lost with a rate of 132.67×104 t/a due to ERP, which accounted for 44.01% of the total loss rate caused by land use changes during 2000-2005. During 2005-2008, the loss rate due to ERP decreased to 77.18×104 t/a, which was equivalent to 58.17% of that in the first five years and 30.22% of the total loss rate caused by land use changes. The agricultural productivity loss from 2000-2008 caused by ERP was more attributed to GFGP (about 70%) than RCTL. Although ERP had a certain influence on cropland productivity during 2000-2008, its effect was still much less than that of urbanization; moreover, ERP was already converted from the project implementation phase to the consolidation phase.