不同埋深浅层地下水对春小麦的补给模式试验研究

目的]从作物需水规律出发,研究不同埋深浅层地下水对作物需水的补给模式及对作物蒸散的影响。方法]设计5个地下水埋深处理,于2008～2009年采用底部密封的试筒进行不同地下水埋深条件下春小麦全生育期潜水蒸发试验。结果]不同埋深地下水对作物生长以及田间蒸发散具有显著影响,补给占ET总量的比重从0到52.0%不等;地下水埋深较浅时,影响地下水对作物补给的主要因素是大气蒸散能力和作物根层深度,埋深较大时则主要受到地下水位的控制。结论]揭示了不同埋深条件下潜水补给包气带及作物需水的机理及模式,为合理高效利用浅层地下水资源、优化春小麦灌溉制度提供依据。

Experimental Study on the Utilization of Shallow Groundwater for Spring Wheat

Objective] The paper aimed to study the utilization and evaporation of shallow groundwater at different depth in spring wheat field.Method] 5 treatments of shallow groundwater table at different depth were designed to do evaporation experiment for spring wheat 2008-2009.Result] The different depth of groundwater had great impact on crop growth and field evaporation,the supplies accounted for 0-52% of ET.The meteorology was the most important control factor on the uptake of groundwater at the shallow tabl...