中文摘要：

以三江平原粮食主产区—佳木斯地区1959-2014年月降水量和月平均气温、日照时数、平均相对湿度、平均风速和平均气压等数据为基础,采用小波变换、多元线性回归等方法分析了佳木斯地区1959年以来月降水量的周期特征以及与其影响因子之间的关系。结果表明：佳木斯地区月降水量具有明显的3个主周期,分别为12、288和480个月;影响月降水量的主要影响因子为平均相对湿度和平均气温,其次为平均气压和日照时数,最后为平均风速。研究成果可为三江平原粮食主产区雨水资源高效利用提供理论依据。

英文摘要：

Basing on the data of monthly precipitation, average monthly temperatures, sunshine hours and average relative humidity from 1959 to 2014 of Jiamusi, which is a major grain production region of Sanjiang Plain, the periodic features and factors of precipitation since 1959 are analyzed with the methods of wavelet transformand and multiple linear regression. The results show that the precipitation has three obvious main oscillation periods of 12, 288 and 480 months; the main factors are the average relative humidity and the average temperature, followed by the average air pressure and sunshine hours, and the last is the average wind velocity. The research results can provide theoretical basis for efficient utilization of rain resources in major grain production region of Sanjiang Plain.