(一)土壤-植物-大气连统体(SPAC)水分传输的机理是比较复杂的,国内研究很少,国外研究也不过近十几年的时间。就目前研究来看,水从土壤经过植物向大气的流动不仅取决于物质间的化学势差(或水势差),而且还受到外部能量(主要是太阳光辐射和土壤上部小气候变化)和植物生理功能等因素的影响。原文在综合这些因素研究连统体的水分传输方面还是有限的,有必要深入研究。 (1) The mechanism of soil-plant-atmosphere continuous body (SPAC) water transport is rather complicated. There are few studies in China and foreign studies have been conducted for nearly a dozen years. For the current study, the flow of water from the soil through the plant to the atmosphere depends not only on the chemical potential difference (or water potential difference) between the material but also on the external energy (mainly solar radiation and microclimate changes in the upper part of the soil) and plant physiology Function and other factors. The original text is still limited in terms of integrating these factors in the study of water transport in the continuum. It is necessary to study in depth.