为了研究水热因子对三江源高寒草地牧草产量的影响,对青海省三江源区兴海县高寒草地1999-2009年的牧草产量与同期降水和温度的关系进行了研究.结果表明,牧草产量与生育期内6月份的积温在0.05水平上呈显著负相关,相关系数为-0.579 3;与4月份降水量、生育期总降水量以及年降水量在0.05水平上呈显著正相关,相关系数分别为0.565 8、0.649 3、0.586 4;与8月降水量在0.10水平上呈显著正相关,相关系数为0.504 2.对牧草产量与生育期间水分和热量各因子进行多元逐步回归分析表明,降水因子对牧草产量起正向促进作用,热量因子对牧草产量起负向作用.%The relationship between pasture yield and precipitation, temperature was studied by analyzing these correlation data in Xinghai county, Qinghai from 1999 to 2009 to study the effect of precipitation and temperature on pasture yield of grassland with high elevation and cold climate. The results showed that there was a significant negative correlation between pasture yield and the accumulation temperature in June and the correlation coefficient was -0. 579 3, there were significant positive correlations between pasture yield and the precipitation in April, total precipitation during growth period of pasture, annually precipitation and their correlation coefficients were 0. 565 8, 0. 649 3 and 0. 586 4 respectively, there was a significant positive correlation between pasture yield and the precipitation in August and the correlation coefficient was 0. 504 2. The regression analysis indicates that the precipitation has the positive effect on pasture yield and temperature has the negative effect on pasture yield.
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