Yan Huimin1; Liu Fang1; Niu Zhongen1; Gu Fengxue2; Yang Yanzhao1
Source Publicationjournalofgeographicalsciences
AbstractMultiple 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 more stable in hilly area than in plain area. An the spatial pattern dynamics of MCI, which is increase from 158% to 164% of MCI occurred irplain 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.
Document Type期刊论文
2.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Yan Huimin,Liu Fang,Niu Zhongen,et al. changesofmultiplecroppinginhuanghuaihaiagriculturalregionchina[J]. journalofgeographicalsciences,2018,028(011):1685.
APA Yan Huimin,Liu Fang,Niu Zhongen,Gu Fengxue,&Yang Yanzhao.(2018).changesofmultiplecroppinginhuanghuaihaiagriculturalregionchina.journalofgeographicalsciences,028(011),1685.
MLA Yan Huimin,et al."changesofmultiplecroppinginhuanghuaihaiagriculturalregionchina".journalofgeographicalsciences 028.011(2018):1685.
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