Undergrowth is an important part of forest eco-system, can promote the litter decomposition and increase soil nutrients return. The soil structure and undergrowth biomass of Cunninghamia lanceolata pure forest and C. lanceolata mixed forest had been compared in order to study the correlation between them and the method of recovery of soil structure soil structure. The results show that (1)The undergrowth biomass under C. lanceolata mixed forest was more than that in the pure forest’s, and of them, the bamboo-C. lanceolata mixed forest’s was the highest;(2)The soil physical property of C. lanceolata mixed forest was better than that of C. lanceolata pure forest, and of them, bamboo-C. lanceolata mixed forest’s was the best;(3)Through the analysis of correlation, it was found that the soil physical properties had significant correlation with the undergrowth biomass, and the shrub layer correlation with the soil physical properties was higher than the herb layer’s. The undergrowth biomass closely related to soil structure, so the development degree of undergrowth is greatly beneficial to improve soil structure and recovering land capability.%林下植被是森林生态系统的重要组成部分，能够促进凋落物的分解并且增强土壤养分的归还。比较杉木混交林与杉木纯林的土壤结构及林下灌草生物量，探究两者间的相关性和土壤结构恢复的方法。研究结果表明：（1）混交林的林下灌草生物量高于纯林，其中毛杉林最高；（2）混交林土壤物理性质优于纯林，毛杉混交林最优；（3）分析相关性发现土壤物理性质与灌木生物量有显著相关性，灌木层相关性高于草本层。所以林下植被与土壤结构关系密切，重视林下植被发育程度有利于改善土壤结构，恢复地力。
展开▼
