高海拔工程扰动区不同植物生态修复适应性研究

Research on Ecological Restoration Adaptability of Different Plants in High Altitude Engineering Disturbance Areas

以砂生槐、白羊草、黑穗画眉草、狗尾草、白三叶草等5种先锋植物为研究对象,通过植物调查和土壤采样室内养分测定,结合主成分分析法,对不同试验区的植物群落结构和土壤肥力进行相关性分析。结果表明:与对照区相比,不同试验区Shannon-Wiener指数(H)表现出显著差异,Simpson优势度指数(D)和Pielou均匀度指数(J)差异不明显,不同群落H值依次为黑穗画眉草植物群落>白羊草植物群落>砂生槐植物群落>白三叶草植物群落>狗尾草植物群落;不同植物群落下土壤有效氮含量、含水率平均值明显高于对照区,砂生槐改良土壤肥力效果最好,白三叶草对土壤含水率影响最大。

Taking five pioneer plants,sand locust,white sheep grass,black eared eyebrow grass,dog tail grass and white clover,as research objects,the correlation between plant community structure and soil fertility in different test areas was analyzed by plant investigation,soil nutrient determination and principal component analysis.The results indicated that compared with the control area,Shannon Wiener index(H)of different test areas was significant different,while Simpson dominance index(D)and Pielou evenness index(J)were not significantly different.H value of different plant communities in order of large to small were black spikelet plant community,white wool plant community,sand locust plant community,white clover plant community,dog tail plant community.The average content of available nitrogen and moisture in soil in different plant communities were significantly higher than those in the control area.Sand locust had the best effect on soil fertility,and white clover had the greatest impact on moisture in soil.