元谋干热河谷草本优势种与土壤因子的相关性

Correlation Between Dominant Species and Soil Factors in Yuanmou Dry-hot Valley

2018年1月在元谋干热河谷地区采用样方调查法及土壤测定方法,探讨草本优势种生长发育与土壤之间的关系。结果表明:样地草本植物共13科21属21种,扭黄茅为草本植物中的主要优势种,其株数、高度、盖度均与土壤含水量显著正相关,相关系数为0. 363、0. 331、0. 370;盖度与土壤湿度显著正相关、与温度显著负相关,其余均不显著。随着土壤含水量的增加,扭黄茅的株数、高度呈现出增加的趋势;随着土壤含水量、土壤湿度的增加,扭黄茅盖度呈现出增加的趋势;而随着土壤温度的不断升高,盖度呈现出逐渐减少的趋势。

In January 2018,the sample survey method and soil determination method were used in the Yuanmou dry-hot valley area to explore the relationship between the growth and development of herbaceous dominant species and soil. The results showed that there were 13 species,21 genera and 13 species of herbaceous plants in the plot,and the main dominant species in the herbaceous plants were heteropogon contortus. The number,height and coverage of the plants were significantly positively correlated with soil water content,and the correlation coefficients were 0. 363,0. 331 and 0. 370. The coverage was significantly positively correlated with soil moisture and significantly negatively correlated with temperature,and the rest were not significant. With the increase of soil water content,the number and height of heteropogon contortus showed an increasing trend. With the increase of soil water content and soil moisture,the degree of heteropogon contortus showed an increasing trend. As the soil temperature increased,the coverage showed a decreasing trend.