植被根系与生态环境相互作用机制研究进展

系统分析了植被生长环境条件对根系生长特征，分布规律，形态以及生理生态等特征产生的深刻影响，以及根系对其所生长的环境条件具有的调节改善功能。阐明了根系与环境条件的相互作用可以形成良性微生态环境，在水土流失严重区，植被根系的存在可以大大提高土壤的抗侵蚀性能，在生态环境的治理和恢复过程中具有重要的生态意义，同时，根系作为生态系统中的一个重要组成部分，在植被演替过程也占有重要地位，演替早期的树种的要命系分布深度和根系总长度都要比后期树种的高，这种分布特征使得林木得以吸收深层的水分和养分，并为顶极植物的生长创造良好的生长环境，在大区域和全球尺度上进行的土壤-植被-大气系统（SVAT）研究中，植被群落的根系分布深度由于决定了植被的水分和养分的供给状况而具有更加重要的生态意义，也将是今后根系研究中的热点问题。

Advances on the Interactional Mechanism between Root System and Eco-enviroment

Effect of environment conditions on root growth, distribution, and morphological, physiological and ecological characters and the amelioration and accommodation effect of vegetation on environment are systematically analysed. It is also illustrated that there may exist favorable micro eco environment as a result of the interaction between plant and environment. And in the seriously eroded areas, the existence of roots in the soil can greatly improve the anti erodibility of the soil, which may be of great importance to the ecological construction and rehabilitation. As root system is an important component in the eco system, it occupies an important position in succession. The rooting depth and total root length of the species at the early successional stage were all larger than that of the species later, which ensures the absorption of water and nutrient from deeper layers for plant growth, and creates better conditions for the apex species growth. In the SVAT (Soil Vegetation Atmosphere Transportation) studies of macro scale and globe, it is agreed that the vegetation root distribution depth is more important as it determines quantity of water and nutrient for vegetation, and will be a hotpot in future root studies.