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一、农田土壤水分的作用与地位农田土壤是农作物赖以生存的基础。农作物的正常生长需要一个土壤疏松透气、养分供应充足、水肥气热易于协调的土壤环境,这是关系到作物能否茁壮生长并取得稳产高产的重要条件。其中,水是最活跃的因素,并占主导地位。水的多少直接制约着气(水、气在土壤中互为消长),水多气少,当水达到一定程度时,则将变成多余水,易引起农田渍害,影响作物生长。当农田水分在适宜的范围内能最大限度地满足作物的水肥供应,达到稳产高产。而当土壤水分少到初始凋萎点左右,则将引起严重失收。土壤水分也制约着土壤热,土壤水分的热容量大,因此缓冲性强,利于作物根系有一个稳定的生长环境。
First, the role and status of farmland soil moisture Farmland soil is the basis for the survival of crops. The normal growth of crops needs a soil loose and breathable, adequate nutrient supply, easy to coordinate water and fertilizer soil environment, which is related to the crop can thrive and achieve stable and high yield an important condition. Among them, water is the most active factor and dominates. Water directly controls the amount of gas (water and gas in the soil each other growth and decline), less water and gas, when the water reaches a certain level, it will become excess water, easy to cause farmland injury, affecting crop growth. When the farmland moisture within the appropriate range to maximize the supply of water and fertilizer crops to achieve stable and high yield. When the soil moisture is less than the initial wilting point, it will cause serious loss. Soil moisture also restricts the soil heat, soil moisture, heat capacity, so the buffer is strong, which will help crop roots have a stable growth environment.