Responses of Grassland Productivity to Climate Change in the Yunwu Mountain in Recent 20 Years
It is important to study the relationship between grassland productivity and climate change so as to carry out the rational countermeasures for regenerating the vegetation and ecology in the Yunwu Mountain.The grassland 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 temperature increase in winter restricted the increase of grassland productivity;③ The utilization ratio of climatic resources 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 further increase the productivity of the grassland on the Loess Plateau.
国家科技期刊平台
NSTL
万方数据
