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在讨论植物与水分的关系时,目前普遍认为水势是客观表示细胞水分状况的一个重要量度。它正本清源,恢复了事物的本来性质。它适用范围广泛,能更准确地解释植物水分与土壤水分及大气内水分的能量状况及相互关系。虽然,从能学的范畴来讨论细胞的水分状态,一开始是用水的化学势(μ_w)来标志的。细胞的吸水或失水也是用细胞与环境之间水的化学势差(μ_w-μ_w~0=△μ_w)来讨论的,并且,所用的单位是尔格·摩尔~(-1)。但是,目前通用的水势是指每偏摩尔体积的水的化学势差(φ_w=△μ_w/V_w)。水势与水的化学势的概念是不
When discussing the relationship between plants and water, it is generally believed that water potential is an important measure of objectively expressing the state of cell water. It cleansed and restored the original nature of things. It has a wide range of applications and can more accurately explain the energy status and interrelationship between plant moisture, soil moisture, and atmospheric moisture. Although the state of moisture in cells can be discussed from the category of energy, it is marked by the chemical potential (μ_w) of water. Absorption or dehydration of cells is also discussed using the chemical potential difference (μ_w-μ_w~0=Δμ_w) between the cell and the environment, and the unit used is erg mole~(-1). However, the current universal water potential refers to the chemical potential difference (φ_w=Δμ_w/V_w) per partial molar volume of water. The concept of water potential and chemical potential of water is not