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松嫩平原黑土区属“雨养农业”区 ,水分的供需状况主要取决于大气降水和土壤水的供给 ,地下水主要供给井灌水稻。根据分析 ,松嫩平原黑土区大气降水季节分布不均 ,一般年份可以满足作物对水分的低水平需求 ,土壤水分起到调节作用 ,地下水资源基本能够满足现有水田面积的供给。图 4
The black soil area of Songnen Plain belongs to the area of “rain-fed agriculture”. The supply and demand of water mainly depends on the supply of atmospheric precipitation and soil water. The groundwater is mainly supplied to wells for irrigation. According to the analysis, the seasonal distribution of atmospheric precipitation in the black soil area of Songnen Plain is uneven. The general year can meet the low water requirement of crops, and the soil moisture plays a regulatory role. The groundwater resources can basically meet the supply of the existing paddy fields. Figure 4