黑河流域中下游地区植物物种生存域研究

基于对地境和根群的认识, 从系统论的角度首次提出了植物物种地境稳定层及生存域概念, 运用多种理化指标的组合状态对黑河中下游多年生植物物种地境稳定层层位进行了确定, 深度范围为40~100 cm.根据各典型植物物种地境稳定层的水土条件相应地圈划了它们的生存域, 并提出了黑河下游地区植被分布与地境关系的一些新认识. 

Study on Survival Regions of Plant Species in Middle-Lower Reaches of Heihe River

Based on systematology and the recognition to underground environment and root mass, the paper submits the conception of plant species stable layer in underground habitat and survival regions for the first time. Then from different aspects, the paper determines the depth range of plant species stable layer in underground habitat for perennial plant in middle-lower drainage of Heihe River, and the depth range is between 40 and 100 cm.By the connection of growth statusof representative species and the water and soil codition of plant species stable layer in underground habitat, the paper adumbrates survival regions of various species and acquires some recognition from the figure of survival regions of species as well as the superposed figure of all survival regions.