关键词: 三江地区, 降水, 农业, 蒸发势, 农田需水量

Abstract: Sanjiang region is situated in the northeastern frontier of China including the Sanjiang plain, Xingkaihu. plain and its contiguous zone, with an area about 106 800 km . It is now an important region of grains and soybeans production and one of the major reclamation areas in China.In this paper, the precipitation regimes and the potential evaporations in Sanjiang region are studied and calculated. Based on the soil-water balance equation, the field water requirements during the growing season of the spring wheat (from April to July) are estimated, and several agricultural features of local precipitation are stated. Besides, the author also presented the preventive and controlling measures for drought and flood in Sanjiang region.

Key words: Sanjiang region, precipitation, agricalture, potential evaporation, field waterrequirement