气候变暖对中国不同地区农业的影响

Based on the China Rural Statistical Yearbook of 1984-2003 published by State Statistics Bureau,and the annual temperature in the same period,impacts of temperature change,agricultural input,and planting area on grin production were analyzed for different regions of China during the last 20 years.The results show that the main characteristic of climate warming has obviously promoted the increase of grain yield in Northeast China.but to some extent suppressed it in North China,Northwest China and Southwest China,and shown no obvious effect on it in East China and Central-South China.The increase in agricultural input facilitated the grain production obviously in various regions in the early stage of the past 20 years,but showed no obvious effect in the late stage.The continuous reduction in sown area had a significant negative effect on the grain production in East China and Central-South China.     

北京翠湖湿地鸟类资源现状及保护对策

2009-2011年对翠湖湿地鸟类进行了调查。结果发现:翠湖湿地记录到鸟类17目40科166种,其中非雀形目鸟类108种,雀形目58种。从居留型来看,旅鸟种类数量最多,留鸟和夏候鸟次之,冬候鸟最少。翠湖湿地拥有多种珍稀濒危鸟类,其中属于国家重点保护野生动物(2003)的34种,属于北京市保护野生动物(2007)的68种;翠湖湿地还拥有一些被列入双边国际协定保护中的候鸟,如《中日候鸟保护协定》、《中澳候鸟保护协定》。翠湖湿地鸟类生物多样性十分丰富,在保护野生动植物和候鸟方面发挥着重要的作用。     

气候变暖对中国不同地区农业的影响

摘要：利用国家统计局《中国农村统计年鉴》1984-2003年的数据和同期年平均温度的观测数据,分析了我国不同地区20年间温度变化、农业生产资料投入以及播种面积变化对粮食总产的影响。结果表明,以温度升高为主要特征的气候变化对东北地区农作物增产有明显促进作用,对华北、西北和西南地区的农作物增产有一定抑制作用,对华东和中南地区的农作物粮食产量的影响则不明显。农业投入的增加对各地区的农作物增产在早期作用均显著,后期则增长缓慢。而各地区播种面积的变化对其总产量影响不太明显,但华东和中南地区农业播种面积的持续下降对粮食总产量有较大的抑制作用。