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黑龙港地区广泛分布着潮土类。试验在旱地田间,通过工程措施断绝了地下及周围的毛管水联系,保持了土壤原状结构。经过三年连续观测发现:1.休闲地田间实际蒸发量小于降水量。2.地面实际蒸发量的高峰不是在春季而是在雨季7、8、9三个月,蒸发强度和表土含水量成直线正相关。3.土壤水分消耗量最大的是棵间蒸发,占作物总耗水量的61.2—77.4％。4.130厘米以下的土壤水分对作物只能维持最低生命,而对形成产量作用甚微。5.正常降水的年份,小麦和夏播作物两季耗水总量超过年降水量104.7—113.7毫米,干旱年份超过159.2毫米,浅层地下水位将继续下降。
Heilongjiang area is widely distributed in the category of soil and water. Experiments in the dry field, through the engineering measures to cut off the underground and surrounding capillary water contact, maintaining the original structure of the soil. After three years of continuous observation found: 1. Leisure field actual evaporation is less than precipitation. The actual evaporation of the ground is not the peak in the spring but in the rainy season 7,8,9 three months, the evaporation intensity and surface water content into a linear positive correlation. 3. The largest soil water consumption is inter-evaporation, accounting for 61.2-77.4% of the total crop water consumption. Soil moisture of 4.130 cm or less can only maintain the lowest life of the crop, but has little effect on the yield. 5. In normal precipitation years, the total amount of water consumed by wheat and summer sowing crops exceeded 104.7-113.7 mm in annual precipitation and 159.2 mm in drought years, and the shallow groundwater table will continue to decline.