【摘要】 根据石羊河流域4个气象站1959—2008年气温和降水资料,应用Miami模型、Thornthwaite Memorial模型,估算了石羊河流域温度气候生产潜力、降水气候生产潜力和蒸散量气候生产潜力。结果表明:石羊河流域气候生产潜力呈上升趋势,流域热量条件较好,水分是限制作物产量的主要因素。由温度估算的气候生产潜力以民勤最高、乌鞘岭最低,其分布规律与年平均气温相似;由降水量估算的气候生产潜力以乌鞘岭最大、民勤最小,呈现随纬度升高而递减的规律,其分布规律与年平均降水量相似。更多还原

【Abstract】 Based on the data of annual average temperature and annual precipitation of 4 meteorological stations from 1959 to 2008 in Shiyang River Basin,the temperature climate productive potential,the precipitation climate productive potential and the evapotranspiration climate productive potential in Shiyang River Basin evaluated by Miami Model and Thomthwaite Memorial Model Taken WR as a main factor.The results indicated that water was the main limited factor for crop yields in Shiyang River Basin,while the thermo conditions were relative good.which determined by the temperature of maximum climatic productivity of Minqin,Wushaoling minimum,north-south difference of about 6 193.71 kg/(hm2·a),Distribution and average annual temperature are similar.Determined by the precipitation climate productivity Wushaoling largest,Minqin minimum,rendering increased with latitude and the law of diminishing,which distribution and average annual precipitation are similar.更多还原