锡林郭勒草原冷季牧草保存率动态研究  

The Preliminary Study on Dynamic of the Grass Preservation Rates in Xilinguole Grassland in the Cold Season

作　　者：崔庆东[1,2] 刘桂香[1] 卓义[1,2] 

机构地区：[1]中国农业科学院草原研究所／农业部草地资源生态重点开放实验室,内蒙古呼和浩特010010 [2]中国农业科学院研究生院,北京100081

出　　处：《中国草地学报》2009年第1期102-108,共7页Chinese Journal of Grassland

基　　金：国家科技支撑项目“草地雪灾监测、预警及灾情评估关键技术研究”(2006BAD16B04-2-2)资助

摘　　要：利用冷季调查的牧草相关数据,以牧草保存率为主要参数,分析研究区域内草甸草原、典型草原、荒漠草原和沙地植被四种草地类型的牧草保存率的变化趋势。结果表明:四种草地类型在常年围封和自由放牧两种利用状态下的牧草保存率逐月递减,其递减趋势各不相同。常年围封状态下,冷季末期(4月)草甸草原、典型草原、荒漠草原和沙地植被牧草保存率分别降至41.7%、48.3%、39.0%和35.5%,平均月递减率分别为10.6%、10.3%、12.2%和12.9%;自由放牧状态下,冷季末期四种草地类型牧草保存率降至11.7%、12.6%、0和12.6%,牧草保存率平均月递减率分别为17.7%、17.5%、20.0%和17.5%。Making use of the grass data investigated in cold season, taking grass preservation rate as the major parameter, the changing trend of grass preservation rates of meadow steppe, typical steppe, desert steppe and sand vegetation was analyzed. The results showed that the grass preservation rates of the four grasslands in fenced and free grazing were decreased month by month in normal year, the decline trend was different among four grasslands. The grass preservation rates of meadow steppe, typical steppe, desert steppe and sand vegetation in the late cold season （April） fenced whole year were 41.7%, 48.3%, 39.0% and 35.5% respectively, average month decrease rates were 10.6%, 10.3%, 12.2% and 12.9% respectively. The preservation rates of meadow steppe, typical steppe, desert steppe and sand vegetation in free grazing were 11.7%, 12.6%, 0 and 12.6% respectively in April, the average month decrease rates were 17.7% ,17.5%,20.0% and 17.5%, respectively.

关 键 词：锡林郭勒草原 牧草保存率 牧草现存量 冷季 

分 类 号：S812.5[农业科学—草业科学]