摘要
利用海北地区近40年的气温、降水资料和近年来的天然牧草资料,分析了海北地区气温、降水变化特征及其变化对天然牧草生物量和草地生态环境的影响。结果表明:海北地区的温度增暖趋势20世纪90年代最明显,各地温度变化的倾向率均为正;降水量的递增在80年代达最高值,90年代有所回落;气象因子对草地生物量和生态环境的影响温度大于降水;降水对生态环境的影响主要表现在降水量的年际波动和年内各季节分布的差异上。
40-year data, including air temperature and rainfall, and grazing grass yield in Haibei region over past few years were used to analyzed the change characteristic of air temperature and rainfall and its influence on grassland eco-environment and grazing grass yield. It was suggested that the air temperature in Haibei region increased most significantly in 1990＇s, the trend of temperature in everyplace is positive. The increase of rainfall reached peak value in 1980＇s, but get down in 1990＇s. The influence of temperature on grassland biomass and eco-environment was larger than that of rainfall. The influence of rainfall on eco-environment was performed in changes of rainfall in different years and distribution of rainfall in different seasons within one year.
出处
《草业科学》
CAS
CSCD
2008年第3期12-17,共6页
Pratacultural Science
关键词
气候变化特征
草地生物量
生态环境
海北地区
Haibei region
climatic change characteristic
grassland biomass
eco-environment
