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文章通过对元谋县沙地村实地调查桉树根系特性,并根据根长、直径、生长方向以及坡度、落差等因素计算得出固土面积、固土体积等指标。结果表明:元谋沙地村桉树地表根系形态以水平根型为主。地表根系的上下坡度值、根长、落差之间存在相关性。根系长度与固土面积、固土体积存在正相关关系;而根系直径仅与固土面积存在正相关关系,与固土体积的关系不明显。其结果不仅可在理论上理解水(分)-土(壤)-生(物)之间的耦合机理,也可更好地指导干热河谷区的生态恢复实践活动。
In this paper, we investigated the root system characteristics of Eucalyptus in Shadi Village of Yuanmou County and calculated the indexes of soil-solidified area and soil volume according to factors such as root length, diameter, growth direction, slope and drop. The results showed that the root morphology of eucalyptus in Shamodeng village in Yuanmou was dominated by horizontal root type. There is a correlation between the up-down slope value, the root length and the drop of the surface root system. There is a positive correlation between the length of root system and the area of solidified soil and the volume of solidified soil. The diameter of root system is only positively related to the area of solidified soil, but not to the volume of solidified soil. The result not only can theoretically understand the coupling mechanism between water, soil and soil, but also can better guide the practice of ecological restoration in the dry-hot valley.