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本文在开展了一系列室内外试验研究基础上，建立了有效根量密度分布函数，得到了较为切合实际的二维根系吸水率模型．同时通过田间不同条件下水面蒸发试验资料分析，得到了条带状覆盖时棵间无麦秸覆盖地和棵间麦秸覆盖地水面蒸发量（各布设２０ｃｍ蒸发皿所观测的值）与大气水面蒸发量（试验场气象站位置布设的２０ｃｍ蒸发皿观测值）之间的关系式．通过农田作物生理指标观测，得到了作物叶面积指数与水面蒸发量之间的关系．从而更合理地处理了条带状覆盖下上边界条件．并以此为基础，建立相应的数学模型，进行了数值模拟，实测值与计算值吻合较好，表明所建立的数学模型是可靠的，数值分析是可行的．
Based on a series of indoor and outdoor experimental studies, this paper established an effective root density distribution function and obtained a more realistic model of two-dimensional root water absorption. At the same time, the data of water surface evaporation under different conditions in the field were analyzed, and the water evaporation (the observed value of 20cm evaporation dish) and the water evaporation (20cm evapotranspiration observed by the weather station in the test site). The relationship between crop leaf area index and water surface evaporation was obtained by observing crop physiological indices. Thus more reasonably dealing with the upper boundary conditions under strip-shaped cover. Based on this, the corresponding mathematical model is established and the numerical simulation is carried out. The measured values are in good agreement with the calculated values, which shows that the established mathematical model is reliable and the numerical analysis is feasible.