植物根系的提水作用

Hydraulic Lift of Plant Root System

在查阅国外大量研究资料的基础上，结合作者几年来的研究结果，对根系提水作用的概念、鉴定、发生数量、研究方法和测定方法以及影响因素进行了论述。并结合中国西北地区干旱半干旱特点和土壤养分与水分分布的空间变异性，探讨了根系提水作用的农学意义，提出了今后开展根系提水作用研究的方向。

With the combination of our studies in recent years and the research results of the others,we review the conception,identification,amount,determing and testing methods,the significance of the hydraulic lift,as well as the factofs affecting the hydraulic lift.Also with the combination of the characteristics of arid and semiarid areas in the northwestern part of China with the spacial variations of soil nutrients and moisture distribution,the agrosignificance of hydraulic litf is discussed and the research trend of hydraulic lift suggested.