河村项目区气候变化及其生产潜力分析

气候是影响植物生产力的重要因素,太原市河村是国家"十一五"科技支撑计划旱作节水高效农业综合技术研究与示范项目区,根据其周边11个气象台站1979~2008年30年的气温和降水资料,利用多元逐步回归方法和Lieth模型,分析了河村30年来气温、降水和气候生产力的变化趋势,讨论了气温、降水变化对气候生产力的影响。结果表明:1979年以来的30年河村年均气温上升了0.54℃,年降水量减少了77.3 mm;温度生产力呈增长趋势,而降水生产力呈减少趋势,温度对气候生产力的影响大于降水,提高降水利用率和水分利用效率是提高植物生产力的主要途径。

Analysis of Climate Change and Climatic Productivity in Hecun

Climate is an important factor for plant productivity,hecun is a project area of the plan of National Eleventh Five-year technical support dryland highly effective agriculture research and demonstration of integrated technologies.According to its surrounding 11 stations since 1979 to 2008 of temperature and rainfall data,using multivariate stepwise regression methods and Lieth model,analysis of the Hecun 30 years of temperature,precipitation and climate trend of productivity,discusses changes in temperature,precipitation impacts.Results indicate that form 1979,30 years the Hecun average temperature rose 0.54℃,annual precipitation reduces 77.3 mm,temperature productivity rose,while rainfall productivity is declining,temperature on impacts more than precipitation,improve utilization of rainfall and water use efficiency is the main way in improving plant productivity.