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土壤水分是农作物生长发育的重要因素之一,它对农田各项活动的顺利进行和能否有良好的耕作质量,农作物的收成好坏都有密切的关系。一个地区的土壤水分状况和当地的气候、地形、土质、植被和农业生产活动因子有关,大气降水是土壤水分的最基本来源,空气、温度、相对湿度和风直接影响土壤的水分消耗,使土壤含水量呈明显的季节性变化。陕西黄土区春季干旱少雨,旱情较为严重。据绥德县29年的资料统计分析,春旱类(包括冬春旱、春旱、秋冬春早、冬春夏旱和春夏旱)共30次,占各类干旱总数的41%。而春季正是春播作物播种出苗和夏熟作物大
Soil moisture is one of the important factors for the growth and development of crops. It is closely related to the smooth progress of farmland activities and the availability of good tillage quality and crop harvest. Soil moisture in a region is related to local climate, topography, soil quality, vegetation and factors of agricultural production activity. Precipitation is the most basic source of soil moisture. Air, temperature, relative humidity and wind directly affect the soil water consumption, The amount of water showed a clear seasonal change. Shaanxi Loess Plateau is arid in spring, the drought situation is more serious. According to statistics and statistics of 29 years in Suide County, spring droughts (including winter and spring drought, spring drought, early autumn and spring early spring, winter, spring and summer drought and spring drought) accounted for 30 times, accounting for 41% of the total number of all kinds of drought. Spring is the spring planting crops and summer crop seedlings