中文摘要：

对元谋干热河谷区冲沟的立地条件和形成原因等方面进行研究,运用重要值方法对4个样区53条冲沟的植被优势种进行筛选和判断,利用SPSS软件分析植被优势种与冲沟发育阶段间的联系。结果表明：该研究区冲沟发育阶段与乔灌草优势种间关系表现为一定的线性关系：发育阶段=0.310＋0.943盖度值（灌木优势种）＋0.702盖度值（草本优势种）,同时两者相关系数达到0.872,相关性显著。冲沟发育过程中,灌木优势种种类逐步增多,而草本逐步变少,并慢慢趋于稳定,由此可以初步判断冲沟的发育阶段,为该区生态恢复提供科学指导。

英文摘要：

Based on the important value method, the dominant vegetation species in 53 gullies of four sample plots have been selected and judged for the analysis of the relationship between the vegetation dominant species and the gully development stages with the SPSS software so as to study the site condition and forming reasons of the gullies in the Yuanmou dry - hot valley. The results show that, the gully development stage and the vegetation dominant species in the study plots appears the linear relationship, the development stage = 0.310 ＋0.943 coverage value （shrub domi-nant species） ＋ 0.702 coverage value （grass dominant species）. Meanwhile, the correlation coefficient reached 0. 872 with obvious relativity. During the development process of gully, shrub dominant species increased gradually while the grass species decreased, tending to be stable. Thus it may be used for the judgment of the development stage of gully, so as to provide the scientific guidance to the eco - restoration in this area.