春季四五月,正值春播期间,冬麦开始拔节,春麦进入分蘖盛期。这时农田需水很多,却常出现春旱,严重影响了作物收成,使高产、稳产难于兑现。 新疆地区降水少而蒸发大,夏季降水多为阵雨,对农业生产意义不大。灌溉水源,基本上依赖高山溶雪。而雪的溶化受气候条件的制约,河渠流量一般五月以前很小,六月急剧上升,七、八月出现洪峯。 April and May spring, coincided with the spring sowing period, winter wheat began to join the spring wheat into the tillering peak. At this time, there is a lot of demand for farmland, but spring drought often occurs, seriously affecting crop yields, making high-yielding and stable production difficult to realize. In Xinjiang, precipitation is less and evaporation is larger, summer precipitation is more showers, and it is of little significance to agricultural production. Irrigation water sources, basically rely on alpine snow melt. The melting of the snow by the climatic conditions, canal flow generally small before May, June rose sharply, July, August peak.