草业学报Issue(5)：116-123,8.DOI:10.11686/cyxb20140513
生态工程前后三江源草地产草量与载畜压力的变化分析
Changes in grassland yield and grazing pressure in the Three Rivers headwater region before and after the implementationof the eco-restoration proj ect
摘要
Abstract
This paper reports on the impact of the Ecological Protection and Construction proj ect in the Three Rivers headwater region.Grassland yield and grazing pressure have been calculated using the Global Production Efficiency Model (GLO-PEM)model and the Grazing Pressure Index.Data have been analysed and compared for the years before and after the project was initiated.Results indicate that the region’s mean grassland yield from 2005 to 2012,after project implementation,was 30.31%higher (694 kg/ha)than from 1988 to 2004,be-fore the project began (533 kg/ha).Following the introduction of the livestock reduction program,the mean index of grazing pressure from 2003 to 2012 was 36.1% lower (1.46)than for the years 1988 to 2002 (2.49). The reasons for grassland recovery and grazing pressure reduction may be due to a combination of the Ecologi-cal Protection and Construction project and climate change.However,the ecological effectiveness of the project has clearly emerged.关键词
三江源/草地产草量/草地载畜压力/生态保护和建设工程/生态成效Key words
Three Rivers headwater region/grassland yield/grazing pressure/ecological protection and con-struction proj ect/ecolog ical effectiveness分类
农业科技引用本文复制引用
张良侠,樊江文,邵全琴,唐风沛,张海燕,李愈哲..生态工程前后三江源草地产草量与载畜压力的变化分析[J].草业学报,2014,(5):116-123,8.基金项目
国家重点基础研究发展计划项目“大尺度土地利用变化对全球气候的影响”（2010CB950902）和国家科技支撑项目“国家尺度生态系统监测与评估技术集成应用系统”（2013BAC03B04）资助。 （）
