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本文主要分析了黑垆土在裸地和作物种植地的土壤水分循环。裸地一般年蒸发量约等于年降水量,其年内土壤水分循环可分为:恢复期、稳定期、损失期。裸地全年0—300厘米土层含水量不低于田间持水量的84%。在有作物参与情况下,黑垆土的水分循环深度和强度大幅度增加,导致土壤水分亏缺,冬小麦田土壤水分亏缺可达195.3毫米,春玉米为168毫米,春玉米田土壤水分循环可达260厘米土层,冬小麦田为220厘米。深层储水在作物产量形成期具有重要作用,因之,必须重视播前的蓄水保墒工作。
This paper mainly analyzes the soil moisture cycling of black soil in bare land and cropland. The bare annual average annual evaporation is equal to the annual precipitation, the soil water cycle can be divided into: the recovery period, the stability period, the loss period. Soil bare 0-300 cm throughout the year soil moisture content of not less than 84% of field capacity. With the participation of crops, the depth and intensity of water cycle of black mulch soil increased greatly, leading to the shortage of soil water. The soil water deficit of winter wheat field reached 195.3 mm and that of spring corn was 168 mm. The soil moisture of spring corn field could be recycled Up to 260 cm soil layer, winter wheat field is 220 cm. Deep water storage plays an important role in the formation of crop yield. Therefore, we must pay attention to the work of storing water and preserving moisture before sowing.