摘要
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 30、.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-0.5793,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 0.5658,0.6493 and 0.5864 respectively,there was a significant positive correlation between pasture yield and the precipitation in August and the correlation coefficient was 0.5042.The regression analysis indicates that the precipitation has the positive effect on pasture yield and temperature has the negative effect on pasture yield.
出处
《贵州农业科学》
CAS
北大核心
2011年第1期181-184,共4页
Guizhou Agricultural Sciences
基金
青海省科技厅科技促进新农村建设计划项目(2009-N-503)
关键词
三江源
高寒草地
牧草产量
相关分析
回归分析
three rivers source
grassland with high elevation and cold climate
pasture yield
correlation analysis
regression analysis
