希拉穆仁草原不同群落土壤水分路径分布规律研究摘 要本文将希拉穆仁草原草地当做分析主体，分析本地区普遍存在的不同群落结构下土壤渗透性能和入渗过程中下渗水分分布特征，通过野外染色示踪法，探讨不同植被群落土壤水分运移规律，对土壤入渗速率，染色面积比等实验因素进行测定，主要得出以下结论：（1）希拉穆仁草原的六种不同群落中短花针茅群落、克氏针茅群落以及银灰旋花群落在土壤入渗过程中下渗水分分布相对均匀，无明显的下渗优先通道；蒙古韭群落、洽草群落、羊草群落水分下渗过程中存在较为明显的连续或不连续的分支结构以及下渗优先通道。（2）不同群落染色面积比整体上均随土层深度的增加呈减小趋势，六种群落类型土壤入渗过程大致可分为 3 个阶段，各个群落种类土壤入渗性能之间具有明显的不同，银灰旋花群落样地土壤渗透和持水性都不高，因此遇到雨天时会进入饱和状态，出现土壤侵蚀的概率更高。（3）土壤入渗性能较强洽草和羊草群落样地入渗湿润峰较深，入渗性能较差的银灰旋花和短花针茅群落染色深度集中在 15cm 以上土层，湿润峰深度也较浅，湿润锋深度与土壤入渗速率呈多项式关系，其中与土壤初渗速率相关性最强。关键词：希拉穆仁草原 土壤入渗 群落类型 染色面积Study on soil water path distribution in differentcommunities of steppeabstractIn this paper, the natural grassland of the meadow grassland was studied. The soil permeability and the distribution characteristics of the infiltration water in the infiltration process were studied. The law of soil moisture migration in different vegetation communities, the infiltration rate of soil and soil, the ratio of dyeing area, and so on were studied by the field tracing method. The main conclusions are as follows:(1) in the six different communities of the hilmoren grassland, the water distribution of Stipa breviflora, Stipa grandis and Convolvulus ammannii in the soil infiltration process is relatively uniform, and there is no obvious priority channel for infiltration. The water infiltration process of the Allium mongolicum, Koeleria asiatica and Leymus ch...
