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本文从孔径分布连续性的角度,讨论了毛管水联系破裂湿度和土壤水运动阶段的划分在定量上的不确定性。同时,根据土壤-植物-大气连续体系水分热力学函数的实测资料,论证了在判断土壤水运移方向时,摘增加原理的局限性和偏摩尔Gibbs自由能减小原理的适用性。并且进一步阐明了水流第二定律的三个基本点,以及在应用该定律时曾经出现的误解。
In this paper, from the perspective of the continuity of pore size distribution, quantitative uncertainty in the division of capillary water contact breaking humidity and soil water movement is discussed. At the same time, according to the measured data of the thermodynamic function of the soil-plant-atmosphere continuous system, the limitations of the principle of additive addition and the applicability of the principle of partial molar Gibbs free energy reduction are demonstrated when judging the direction of soil water transport. And further clarified the three basic points of the second law of water flow, as well as the misunderstandings that have appeared in the application of the law.