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地形对三江源区高寒草地暖季草场载畜量空间分布格局的影响-于龙

日期:2016-10-17|来源:

  长期超载过牧是造成青藏高原地区高寒草地生态系统退化的最主要的原因,青藏高原自由放牧管理方式下家畜采食活动轨迹与草地生产力空间分布受地形因子的影响十分显著,造成放牧压力与草地生产力在空间分布上的差异,加上放牧对暖季牧场利用不足,导致现行的天然草地草畜平衡管理办法计算出的理论载畜量计算值被严重高估,造成长期的超载过牧的恶性循环。本项目依托全球定位系统、高光谱遥感和地理信息系统集成技术,以三江源区高寒草甸暖季放牧系统为研究对象,设计放牧控制实验,研究地形因子(坡度、坡向)对放牧家畜空间活动分布规律的影响,探索草地生产力的时空分布与放牧压力空间分布的对应关系,更新载畜量估算方法、改善放牧管理方式,为建立新的草畜平衡监测和管理奠定基础,为三江源区生态环境保护和可持续发展提供理论和技术支撑。
 
Long-term overgrazing is the dominated cases for alpine grassland degradation on the Qinghai-Tibet Plateau. Topography factors such as slope and aspect have significant effects on livestock grazing trajectory and spatial distribution natural grassland productivity, which mismatched spatial coupling of grazing patterns and heterogeneity of grassland productivity, especially under freedom grazing management. Current carrying capacity calculation methods about natural grassland reasonable standards is unsuitable for carrying capacity which may cause serious overestimate phenomenon during to lack consideration of terrain impacts. Based on the Global Positioning Systems, Remote Sensing and Geographical Information Systems ,an experiment was designed to explore relationships between grazing distribution patterns and grassland heterogeneity under terrain factor and space distribution relationship between grazing animals, in the source area alpine meadows grazing system, and build for establishing a new balance monitoring and management lays the foundation, the source area for ecological environment protection and restoration theory and provide technical support.




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