摘要
位于青藏高原边缘地区的天祝县天然草地普遍退化,严重退化草地面积占草地总面积的34.4%。草地覆盖度、高度和产量较20世纪50年代分别下降了11.11%、41.7%和30.4%;草地群落内物种数下降,禾本科比例降低,毒杂草比例增加。草地退化主要因素包括气候干旱化、季节性超载、鼠虫危害、乱采滥挖。针对草地资源利用现状和草地生态建设的薄弱环节,提出草地资源持续利用策略。
Tianzhu County locates at the edge regions of Qinghai-Tibetan Plateau, and grassland in this County generally degrades, in which degradation area of grassland counts for 34. 4% of total grassland area. The present cover, height and yield reduced by 11.11%, 41.7% and 30.4% when compared to those in the 1950s, and the gramineous plant in grassland communities greatly decreased and the unpalatable plants increased. This study pointed out that the climate warming, overgrazing, pest and rodent, and illegal utilization contributed to the grassland degradation. Based on current situation of grassland, this study proposed the some advices of sustainable utilization of grassland.
出处
《草业科学》
CAS
CSCD
北大核心
2011年第9期1690-1694,共5页
Pratacultural Science
基金
国家行业公益项目(200903060)
国家社会科学基金(08BJY035)
