三江源果洛地区牧草长势特征及其与气象条件的关系

利用2003—2016年三江源果洛地区6县牧草观测资料和同期气象观测资料,对果洛地区牧草长势变化特征及其与牧草生育期(4—9月)气温、降水量、日照等气象条件的相关性进行分析。结果表明,果洛地区6县中班玛、久治牧草长势最好,玛沁、甘德、达日次之,玛多最差;就平均长势而言,近14年果洛地区牧草长势趋于良好,牧草高度、覆盖度、产量均呈增加趋势。通过对牧草长势和牧草生育期的气温、降水量、日照时数的相关性分析表明,随着降水量的增加,牧草产量也相应的增加;而随着日照时数增加,牧草产量却呈减少趋势。

Characteristics of Pasture Growth and Its Relationship with Meteorological Conditions in Guoluo Area of Three River Sources

Using the pasture observation data and the meteorological observation data of six counties in Guoluo area of three river sources from 2003 to 2016,the characteristics of pasture growth and its relationship with meteorological conditions such as temperature,precipitation and sunshine during the pasture growth period (April to September) were analyzed.The results showed that the pasture growth of Banma and Jiuzhi were the best,and Maqin,Gande and Dari were second,Maduo was the worst.In terms of the average growth,the pasture in Guoluo area had become good in the past 14 years,and the height,coverage and yield of pasture were increasing.The correlation analysis of pasture growth and the temperature,precipitation and sunshine hours of pasture growth period showed that,with the increase of precipitation,the yield of pasture increased correspondingly;and with the increase of sunshine hours,the yield of pasture decreased.