1967—2017年青海果洛地区气候变化及其对天然牧草的影响

为了解青海省果洛地区天然草地牧草产量与气候条件的关系,利用青海省果洛州6县1967—2017年的气温、降水、日照时数和2003—2017年牧草产量资料,分析了果洛地区气温、降水和日照时数变化特征及其对牧草产量的影响。结果表明：果洛各地年平均气温均呈现极显著的升温趋势,降水量随年际的延长总体上呈现增多趋势,日照时数随年际的延长总体上呈现减少趋势。果洛地区的年牧草总产量主要由每年8月的产量决定,8月的牧草产量与生长期时段中的气温、降水量之间存在显著的正相关,与日照时数存在显著的负相关。

Climate Change and Its Impact on Natural Pasture in Guoluo, Qinghai 1967-2017

To understand the relationship of natural grassland forage yield and climate of Guoluo in Qinghai, using the temperature, precipitation, sunshine hours data from 1967 to 2017 and the forage yield data from 2003 to 2017 of six counties of Guoluo, we analyzed the variation characteristics of temperature, precipitation and sunshine hours and their influence on forage yield. The results showed that: the annual average temperature presented a significantly warming trend, the precipitation presented a trend of increase, and the annual sunshine hours presented a trend of decrease. The forage production is mainly determined by the production of August, there was a significantly positive correlation between the herbage production in August and the air temperature, precipitation, and a significantly negative correlation between the herbage production in August and the sunshine hours in growing period.