中文摘要：

利用国家农业气象站河北省10个站点2001年-2010年的农业气象、夏玉米产量和农田土壤湿度等资料,采用线性回归分析等方法,研究了河北省夏玉米产量与降水量、积温及土壤湿度之间的关系。结果表明：多数站点夏玉米产量与降水量、积温、土壤相对湿度呈正相关关系。在夏玉米生长季节内当降水总量为250～450mm、积温大于2 200℃、土壤相对湿度大于田间持水量的70%时,河北省玉米产量可达其最高产量的70%以上。若降水量低于250mm,需通过灌溉补充土壤水分,以保障玉米产量。

英文摘要：

The relationships among the summer maize yield and the precipitation amount,accumulative temperature,and soil moisture were analyzed using the linear regression method based on the data of agricultural meteorology,maize yield,and soil moisture at 10 agricultural and meteorological stations in Hebei province from 2001 to 2010,which can help understand the factors affecting the maize yield.The results showed that the summer maize yield is in positive correlation with the seasonal precipitation,accumulative temperature,and mean soil moisture at most of the stations.The maize yield in Hebei province can reach 70% of its maximum yield when the precipitation amount in the growing season of maize is 250～450 mm,the accumulative temperature is more than 2 200 ℃,and the soil moisture is higher than 70% of the field moisture capacity.When the seasonal precipitation is less than 250 mm,irrigation is needed to supplement the soil moisture and then ensure the maize yield.