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黄土高原旱作牧草所需水分是大气降水通过纳、存而起着调节和再分配的作用。草地的水分主要消耗于植株的蒸腾和棵间蒸发,其耗水量与牧草品种、发育阶段、产量、自然条件等有关,其耗水的高峰期是牧草生殖生长最旺盛时期。日耗水量强度的变化曲线呈抛物线状。
The water required for dry grazing in the Loess Plateau is the role of regulation and redistribution of atmospheric precipitation through precipitation and storage. Grassland water is mainly consumed in the transpiration and transpiration of plants. Its water consumption is related to forage species, development stage, yield, natural conditions, etc. The peak water consumption is the most productive period of forage reproductive growth. Daily water consumption intensity curve was parabolic.