2000–2012年中国黄淮海农业区多熟种植时空变化（英文）

编号 zgly0001645385

文献类型 期刊论文

文献题名 2000–2012年中国黄淮海农业区多熟种植时空变化（英文）

作者 闫慧敏  刘芳  牛忠恩  顾峰雪  杨艳昭 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences  InstituteofEnvironmentandSustainableDevelopmentinAgriculture  ChineseAcademyofAgriculturalSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2018年11期

年份 2018 

分类号 S31 

关键词 Huang-Huai-Haiagriculturalregion  MCI  spatio-temporaldynamics  MODIS  EVI  landscapepattern 

文摘内容 Multiple cropping index(MCI) is the ratio of total sown area and cropland area in a region,which represents the regional time intensity of planting crops.Multiple cropping systems have effectively improved the utilization efficiency and production of cropland by increasing cropping frequency in one year.Meanwhile,it has also significantly altered biogeochemical cycles.Therefore,exploring the spatio-temporal dynamics of multiple cropping intensity is of great significance for ensuring food and ecological security.In this study,MCI of Huang-Huai-Hai agricultural region with intensive cropping practices was extracted based on a cropping intensity mapping algorithm using MODIS Enhanced Vegetation Index(EVI) time series at 500-m spatial resolution and 8-day time intervals.Then the physical characteristics and landscape pattern of MCI trends were analyzed from 2000–2012.Results showed that MCI in Huang-Huai-Hai agricultural region has increased from 152% to 156% in the 12 years.Topography is a primary factor in determining the spatial pattern dynamics of MCI,which is more stable in hilly area than in plain area.An increase from 158% to 164% of MCI occurred in plain area while there was almost no change in hilly area with single cropping.The most active region of MCI change was the intersection zone between the hilly area and plain area.In spatial patterns,landscape of multiple cropping systems tended to be homogenized reflected by a reduction in the degree of fragmentation and an increase in the degree of concentration of cropland with the same cropping system.