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黄淮海平原的土壤水分状况黄淮海平原地处暖温带的季候风区,年降雨量500—800毫米,地下水位1—3米,土壤水分虽然主要靠降雨来补给,但地下水也是重要的给源,土壤水分的补给属于降雨——地下水补给型。由于气候具有明显的干湿季节,因此,土壤也具有明显的干湿变化,土壤水分状况属于淋溶水成型。土壤水分的年循环可以分为以下四个时期。春季初夏返浆蒸发水分强烈消耗时期:初春气温回升,土壤开始化冻,但由于冻层下部尚在冻结,影响上层融冻水的下渗,使表层土壤含水量增高,呈泥浆状,此即返浆期。此期为时很短,干旱年返浆现象并不明
Soil Water Status in Huang-Huai-Hai Plain The Huang-Huai-Hai Plain is located in a warm temperate monsoon zone with annual rainfall of 500-800 mm and groundwater level of 1-3 meters. Although soil moisture is mainly supplied by rainfall, groundwater is also an important source , The supply of soil moisture is rainfall - groundwater recharge type. As the climate has obvious dry and wet season, so the soil also has obvious wet and dry changes, soil water status is leaching water forming. The annual cycle of soil moisture can be divided into the following four periods. Early spring back to the strong evaporation of water evaporation period: early spring temperatures rise, the soil began to freeze, but the lower part of the frozen layer is still frozen, affecting the infiltration of the upper layer of frozen water, so that the surface soil moisture content increased muddy, that is, back Slurry. This period of time is very short, dry years back to pulp phenomenon is not clear