QQ客服 官方微博 反馈留言

	Multiple cropping intensity in China derived from agro-meteorological observations and MODIS data
	Yan H. M. ; Xiao X. M. ; Huang H. Q. ; Liu J. Y. ; Chen J. Q. ; Bai X. H.
	2014
关键词	agricultural intensification multiple-cropping crop calendar agro-meteorological observation moderate resolution imaging spectroradiometer (MODIS) gross primary production paddy rice agriculture land-use time-series temporal patterns vegetation cover phenology croplands census
英文摘要	Double- and triple-cropping in a year have played a very important role in meeting the rising need for food in China. However, the intensified agricultural practices have significantly altered biogeochemical cycles and soil quality. Understanding and mapping cropping intensity in China's agricultural systems are therefore necessary to better estimate carbon, nitrogen and water fluxes within agro-ecosystems on the national scale. In this study, we investigated the spatial pattern of crop calendar and multiple cropping rotations in China using phenological records from 394 agro-meteorological stations (AMSs) across China. The results from the analysis of in situ field observations were used to develop a new algorithm that identifies the spatial distribution of multiple cropping in China from moderate resolution imaging spectroradiometer (MODIS) time series data with a 500 m spatial resolution and an 8-day temporal resolution. According to the MODIS-derived multiple cropping distribution in 2002, the proportion of cropland cultivated with multiple crops reached 34% in China. Double-cropping accounted for approximately 94.6% and triple-cropping for 5.4%. The results demonstrat that MODIS EVI (Enhanced Vegetation Index) time series data have the capability and potential to delineate the dynamics of double- and triple-cropping practices. The resultant multiple cropping map could be used to evaluate the impacts of agricultural intensification on biogeochemical cycles.
出处	Chinese Geographical Science
卷	24
期	2
页	205-219
收录类别	SCI
语种	英语
ISSN号	1002-0063
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29476]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yan H. M.,Xiao X. M.,Huang H. Q.,et al. Multiple cropping intensity in China derived from agro-meteorological observations and MODIS data. 2014.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。