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On soil salinization of Huang-huai-Hai Plain: in light of the evolution of salt-affected soils in the tianran-wenyan canal basin of north Henan 会议论文  OAI收割
Pro.of international sym. on dynamics, Nanjing, 1989
Li Li-qun,Wang Zun-qing
收藏  |  浏览/下载：15/0  |  提交时间：2011/04/07
The processes and regionalization of soil salinization and alkalization in China 会议论文  OAI收割
Proceedings of the international symposium on the reclamation of salt-affected soils, Jinanng, 1985
Wang Zun-qin
收藏  |  浏览/下载：10/0  |  提交时间：2011/04/07
Salt affected soils and salinization Hzard in east Asia and its neihboring regions 会议论文  OAI收割
Transaction of 16th world congress of soil science, 1994
Zhao Qiguo,Yang Jingsong and Li Liqun
收藏  |  浏览/下载：13/0  |  提交时间：2011/04/01
Salinization characteristics of uncropped soil in the southern piedmon plain of the tianshan mountains 会议论文  OAI收割
Proceedings of the international works hop on classification and management of arid-desert soils, 1993
Yu Renpei
收藏  |  浏览/下载：52/0  |  提交时间：2011/04/01
Salinization characteristics of uncropped soil in the southern piedmon plain of the tianshan mountains 会议论文  OAI收割
Proceedings of the international works hop on classification and management of arid-desert soils, 1993
Yu Renpei
收藏  |  浏览/下载：14/0  |  提交时间：2011/04/01
Salt affected soils and salinization Hzard in east Asia and its neihboring regions 会议论文  OAI收割
Transaction of 16th world congress of soil science, 1994
Zhao Qiguo,Yang Jingsong and Li Liqun
收藏  |  浏览/下载：11/0  |  提交时间：2011/04/01
Eco-reconstruction in Northwest China 会议论文  OAI收割
作者:  Zheng D.
收藏  |  浏览/下载：13/0  |  提交时间：2012/06/30
Land use dynamics and landscape change pattern in Hetao irrigation district, Inner Mongolia, China 会议论文  OAI收割
6th International Symposium on Digital Earth: Data Processing and Applications, Beijing, China, September 9, 2009 - September 12,2009
Zhang, Yinhui; Luo, Yi; Zhao, Wenwu
收藏  |  浏览/下载：15/0  |  提交时间：2014/12/07
This study analyzed spatial and temporal changes in land use in an irrigation district covering an area of 1.7 million ha in Northern China by GIS analyses and also investigated changes in landscape pattern using the landscape structure analysis program FRAGSTATS over the study period from 1986 to 2000. The decreases in farmland and the increases in grassland area mainly resulted from the policy of grain for green and converting slope farmland into pasture from China government. In spite of the efforts to conserve the fragile ecosystem  the land degradation  including soil salinization and grassland degradation  was spreading rapidly. The area of alkali-saline land increased by 22493 ha and about 50555 ha of dense grassland degraded into mid-density grassland. In terms of landscape fragmentation  both farmland and dense grassland showed the tendency of increased fragmentation. Both adverse natural conditions and human activities are responsible for the land degradation expansion in Hetao irrigation district  but the root causes are increasing population pressure and irrational human activities  such as flooding irrigation method and over-grazing. To prevent land degradation from spreading  population control and improvement of the management are prerequisite approaches. 2010 SPIE.  
Role of water management in ecological restoration and economic development in arid regions Taken the lower reaches of Tarim River as an example 会议论文  OAI收割
4th International Conference on Computer Sciences and Convergence Information Technology, Seoul, SOUTH KOREA, NOV 24-26, 2009
Li Jimei; Xu Hailiang; Ye Mao
收藏  |  浏览/下载：16/0  |  提交时间：2011/08/23
Drip irrigation with saline water in North China Plain 会议论文  OAI收割
Kang Y. H.; Wan S. Q.; Chen M.
收藏  |  浏览/下载：13/0  |  提交时间：2012/06/30