Assessing the consequence of land use change on agricultural productivity in China
文献类型：SCI/SSCI论文
| 作者 | Tao B. |
| 发表日期 | 2009 |
| 关键词 | cultivated land land use change agricultural productivity remote sensing food security China net primary production cultivated land model efficiency trends |
| 英文摘要 | China's cultivated land has been undergoing dramatic changes along with its rapidly growing economy and population. The impacts of land use transformation on food production at the national scale, however, have been poorly understood due to the lack of detailed spatially explicit agricultural productivity information on cropland change and crop productivity. This study evaluates the effect of the cropland transformation on agricultural productivity by combining the land use data of China for the period of 1990-2000 from TM images and a satellite-based NPP (net primary production) model driven with NOAH/AVHRR data. The cropland area of China has a net increase of 2.79 Mha in the study period, which causes a slightly increased agricultural productivity (6.96 Mt C) at the national level. Although the newly cultivated lands compensated for the loss from urban expansion, but the contribution to production is insignificant because of the low productivity. The decrease in crop production resulting from urban expansion is about twice of that from abandonment of arable lands to forests and grasslands. The productivity of arable lands occupied by urban expansion was 80% higher than that of the newly cultivated lands in the regions with unfavorable natural conditions. Significance of cropland transformation impacts is spatially diverse with the differences in land use change intensity and land productivity across China. The increase in arable land area and yet decline in land quality may reduce the production potential and sustainability of China's agro-ecosystems. (C) 2008 Elsevier B.V. All rights reserved. |
| 出处 | Global and Planetary Change |
| 卷 | 67 |
| 期 | 1-2 |
| 页 | 13-19 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0921-8181 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22633]  |
| 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 | Tao B.. Assessing the consequence of land use change on agricultural productivity in China. 2009. |
入库方式： OAI收割
来源：地理科学与资源研究所
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