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土壤水分是农业生产的前提,土壤水分的平衡或失调,直接影响着农业生产。土壤水分的运行规律左右着土壤水分的蓄积与消耗,如大气降水、人工灌溉水、地下水的供应及水汽的凝结等直接影响着土壤水分的蓄积;而地面蒸发、作物叶面蒸腾、土壤渗漏及地表径流等,又直接影响着土壤水分的消耗。土壤水分收支不平衡,消耗量大于蓄积量时,就造成土壤干旱,而影响土壤干旱的主导因素是大气降水之过少。河南的气候特
Soil moisture is the prerequisite for agricultural production, soil moisture balance or imbalance, a direct impact on agricultural production. The regularity of soil moisture affects the accumulation and depletion of soil moisture, such as atmospheric precipitation, artificial irrigation water, supply of groundwater and condensation of water vapor, which directly affect the accumulation of soil moisture. However, ground evaporation, crop foliage transpiration and soil leakage And surface runoff, but also directly affect the soil moisture consumption. Soil water balance is unbalanced, consumption is greater than the volume of accumulation, resulting in soil drought, and the dominant factor affecting soil drought is the atmospheric precipitation is too small. Henan climate special