Arid
DOI10.3390/rs2071625
Global Patterns of Cropland Use Intensity
Siebert, Stefan1; Portmann, Felix T.2; Doell, Petra2
通讯作者Siebert, Stefan
来源期刊REMOTE SENSING
EISSN2072-4292
出版年2010
卷号2期号:7页码:1625-1643
英文摘要

This study presents a global scale analysis of cropping intensity, crop duration and fallow land extent computed by using the global dataset on monthly irrigated and rainfed crop areas MIRCA2000. MIRCA2000 was mainly derived from census data and crop calendars from literature. Global cropland extent was 16 million km(2) around the year 2000 of which 4.4 million km(2) (28%) was fallow, resulting in an average cropping intensity of 0.82 for total cropland extent and of 1.13 when excluding fallow land. The lowest cropping intensities related to total cropland extent were found for Southern Africa (0.45), Central America (0.49) and Middle Africa (0.54), while highest cropping intensities were computed for Eastern Asia (1.04) and Southern Asia (1.0). In remote or arid regions where shifting cultivation is practiced, fallow periods last 3-10 years or even longer. In contrast, crops are harvested two or more times per year in highly populated, often irrigated tropical or subtropical lowlands where multi-cropping systems are common. This indicates that intensification of agricultural land use is a strategy that may be able to significantly improve global food security. There exist large uncertainties regarding extent of cropland, harvested crop area and therefore cropping intensity at larger scales. Satellite imagery and remote sensing techniques provide opportunities for decreasing these uncertainties and to improve the MIRCA2000 inventory.


英文关键词cropland cropping intensity agriculture land use productivity global scale fallow
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000208401700001
WOS关键词MAPPING PADDY RICE ; SHIFTING CULTIVATION ; AGRICULTURE ; MODIS ; FOOD ; MAP
WOS类目Remote Sensing
WOS研究方向Remote Sensing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/166232
作者单位1.Univ Bonn, Inst Crop Sci & Resource Conservat, D-53115 Bonn, Germany;
2.Goethe Univ Frankfurt, Inst Phys Geog, D-60054 Frankfurt, Germany
推荐引用方式
GB/T 7714
Siebert, Stefan,Portmann, Felix T.,Doell, Petra. Global Patterns of Cropland Use Intensity[J],2010,2(7):1625-1643.
APA Siebert, Stefan,Portmann, Felix T.,&Doell, Petra.(2010).Global Patterns of Cropland Use Intensity.REMOTE SENSING,2(7),1625-1643.
MLA Siebert, Stefan,et al."Global Patterns of Cropland Use Intensity".REMOTE SENSING 2.7(2010):1625-1643.
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