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Livestock-carrying capacity and overgrazing status of alpine grassland in the Three-River Headwaters region, China

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文摘 The Three-River Headwaters region in China is an ecological barrier providing environmental protection and regional sustainable development for the mid-stream and downstream areas, which also plays an important role in animal husbandry in China. This study estimated the grassland yield in the Three-River Headwaters region based on MODIS NPP data, and calculated the proper livestock-carrying capacity of the grassland. We analyzed the overgrazing number and its spatial distribution characteristics through data comparison between actual and proper livestock-carrying capacity. The results showed the following: (1) total grassland yield (hay) in the Three-River Headwaters region was 10.96 million tons in 2010 with an average grassland yield of 465.70 kg/hm~2 (the spatial distribution presents a decreasing trend from the east and southeast to the west and northwest in turn); (2) the proper livestock-carrying capacity in the Three-River Headwaters region is 12.19 million sheep units (hereafter described as “SU”), and the average stocking capacity is 51.27 SU [the proper carrying capacity is above 100 SU/km~2 in the eastern counties, 60 SU/km~2 in the central counties (except Madoi County), and 30 SU/km~2 in the western counties]; and (3) total overgrazing number was 6.52 million SU in the Three-River Headwaters region in 2010, with an average overgrazing ratio of 67.88% and an average overgrazing number of 27.43 SU/km~2. A higher overgrazing ratio occurred in Tongde, Xinghai, Yushu, Henan and Zekog. There was no overgrazing in Zhiduo, Tanggula Township and Darlag, Qumerleb and Madoi. The remainder of the counties had varying degrees of overgrazing.
来源 Journal of Geographical Sciences ,2014,24(2):303-312 【核心库】
DOI 10.1007/s11442-014-1089-z
关键词 proper livestock-carrying capacity ; actual livestock-carrying capacity ; overgrazing number ; Three-River Headwaters region
地址

Chinese Research Academy of Environmental Sciences, State Environmental Protection Key Laboratory of Regional Ecological Processes and Functions Assessment, Beijing, 100012

语种 英文
文献类型 研究性论文
ISSN 1009-637X
学科 社会与环境;灾害及其防治
基金 The Chinese National Non-profit Program for Environment Protection
文献收藏号 CSCD:5039693

参考文献 共 32 共2页

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引证文献 27 篇

1 张继平 基于MODIS GPP/NPP数据的三江源地区草地生态系统碳储量及碳汇量时空变化研究 生态环境学报,2015,24(1):8-13
CSCD被引 55 次

2 周悦 中国植物种质资源在草原生态系统修复中的作用 中国草地学报,2016,38(1):111-115
CSCD被引 2 次

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