Remotely-sensed changes in agricultural productivity in China from the 1980s to the 1990s
文献类型：会议论文
| 作者 | Yan H. M. ; Liu J. Y. ; Cao M. K. ; Gao Z. Q. ; Zhuang D. F. ; Guo J. K. ; Xu X. L. |
| 出版日期 | 2004 |
| 会议名称 | Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie) |
| 关键词 | agricultural ecosystem AVHRR GLO-PEM net primary productivity spatial pattern global primary production land data set satellite-observations vegetation index model surface photosynthesis transpiration drift par |
| 页码 | 319-327 |
| 英文摘要 | During the past 20 years, China's agro-ecosystems have great changes in response to changes in climate and agricultural management. Agricultural productivity is of vital importance to the national food security and sustainable development. So far, agricultural statistics are the only source of the data about changes in agricultural productivity in national scale, and there is little geo-spatial information on these changes. Remote sensing provides an important tool to monitor the spatial and temporal variations at high resolution, but it had yet to be used fully at regional and national scales to assess the interannual and long-term changes in agricultural productivity. This study estimated agricultural net primary productivity (ANPP) at the national level using a remote sensing-based production efficiency model, GLO-PEM. In the study, the arable area has been derived from TM data. ANPP was calculated from 8km, 10-day composite Advanced Very High Resolution Radiometers (AVHRR) data from 1981 to 2000 using GLO-PEM model. Using the data we analyzed the spatial variations in agricultural productivity in China between the 1980s and the 1990s. A 3-level hierarchy regionalization system is used in analyzing the spatial pattern and its changes in the agricultural productivity. China's average agricultural ANPP increased 59.8 million tons from the 1980s to the 1990s. The increment of ANPP mainly occurred in the major cereal-planting plains, especially HuangHuaiHai Plain. The characteristics of land resources are the dominating factors to cause the changes at 10 years scale. There were some decreases, which mainly caused by the degradation on fragile lands, the rapid expansion of rural industries, and the urban development from high-quality arable lands. |
| 收录类别 | CPCI |
| 会议录出版者 | Spie-Int Soc Optical Engineering |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 0-8194-5482-6 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/25350]  |
| 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.,Liu J. Y.,Cao M. K.,et al. Remotely-sensed changes in agricultural productivity in China from the 1980s to the 1990s[C]. 见:Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie). |
入库方式： OAI收割
来源：地理科学与资源研究所
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