青海湖流域降水量季节分配对高寒草甸草原地上植物量的影响  

Effect of seasonal distribution of precipitation on aboveground biomass of alpine meadow in Qinghai Lake basin

作　　者：周毛措 赵德 王晓明[2] 

机构地区：[1]青海省共和县草原工作站,青海共和813000 [2]青海省海南州气象局,青海共和813000

出　　处：《草原与草坪》2013年第4期84-87,共4页Grassland and Turf

摘　　要：依据青海湖流域高寒草甸草原1996-2011年连续16年的牧草产量统计以及同期气候资料，在此基础上应用积分回归模型计算，得出4月上旬～9月上旬各旬降水量对高寒草句草原牧草产量的影响。结果表明：牧草生育期4月上旬～9月上旬旬降水量的变化及其季节分配直接导致了高寒草甸草原的天然牧草产量变化；4月上旬～5月上旬、6月中旬～8月上旬及8月下旬～9月上旬的旬降水量对高寒草甸草原牧草产量均具有正效应，是牧草对水分需求的3个关键时期。Based on the data of grassland yield in 16 years and and corresponding meteorological data in Qinghai Lake Basin, the effect of seasonal distribution of precipitation on aboveground biomass of alpine meadow during Apri to Spet. was studied with the integral regression model. The results showed that the change and sea- sonal distribution of precipitation during Apri to Spet. directly influenced the changes of grass yield of alpine meadow. The precipitation from the first ten days of April to the first ten days of May, from the middle ten days of June to the first ten days of August,and from the last tendays of August to the first ten days of September had positive effect on the grassland yield. The period are the key time for grass growth.

关 键 词：降水量 牧草产量 积分回归模型 高寒草甸草原 

分 类 号：S812[农业科学—草业科学]