Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/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
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EISSN | 2072-4292 |
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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