前言将近一个世纪以来,随着土壤科学的发展和农业生产的需要,人们一直在通过各种途径致力于研究土壤与水、水与植物以及土壤、植物与水之间的相互关系,并已取得较大进展。但是,运用能量概念,把土壤—植物—大气当作一个在物理上统一的连续体系进行动态的、定量的水分研究,还不足二十年的历史。 1966年,Philip 提出了比较完整的关于土壤—植物—大气连续体系(简称SPAC) Introduction For nearly a century, with the development of soil science and the need of agricultural production, people have been devoting themselves to researching the relationship between soil and water, water and plants, soil, plants and water by various means and have obtained Big progress. However, using the concept of energy, it is less than two decades old to study soil-plant-atmosphere as a dynamic and quantitative moisture study in a physically uniform and continuous system. In 1966, Philip proposed a relatively complete soil-plant-atmosphere continuity system (referred to as SPAC)