水保所知识产出(1956---)知识库

研究云雾山典型草原生产力与气候变化的关系，制定合理应对措施，是云雾山植被重建和生态环境恢复的
重要保障。本文基于 1992—2011 年气候数据和相应的草地生产力调查资料，分析了云雾山草地生产力、气候生产
潜力变化特征及其与温度和降水变化的关系。结果表明:① 近 20 a 来研究区年平均气温显著升高，冬春季增温高
于夏季;年降水量呈下降趋势，但未达显著水平，仅 7 月降水量显著下降。② 夏季增温及干旱导致云雾山草地生产
力及气候生产潜力下降，此外，冬季增温也抑制草地生产力的提高。③ 研究区气候资源利用率为 53%，尚有一半
的生产潜力有待开发;适度利用、改良草场，增加人工草场培育是进一步提高草地生产力的有效途径。

It is important to study the relationship between grassland productivity and climate change so as to car-
ry out the rational countermeasures for regenerating the vegetation and ecology in the Yunwu Mountain． The grass-
land productivity，potential climate productivity trend and their correlations with climate change were analyzed based
on the long-term climatic data and productivity records of Yunwu Mountain grassland on the Loess Plateau during
the period of 1992 －2011． The results are as follows: ① In recent 20 years，the mean annual temperature increased
significantly，and the temperature increase in winter and early spring was higher than that in summer． There was no
significant trend of annual precipitation，however，rainfall in July decreased significantly; ② Warming and drought
in summer resulted in the decrease of productivity and potential climate production of the grassland，while the tem-
perature increase in winter restricted the increase of grassland productivity; ③ The utilization ratio of climatic re-
sources in the study area was 53%，which indicated that about another half of potential productivity needed to be
further developed． Proper use and improvement of natural grassland and development of artificial pastures will fur-
ther increase the productivity of the grassland on the Loess Plateau．