枫香与不同树种混交林的培肥土壤功能

为掌握枫香Liquidambar formosana与不同树种混交林改良地力的效果,采用标准地调查法,通过测定枫香与不同树种混交林及杉木Cunninghamia lanceolata纯林的土壤肥力指标,进行枫香与不同树种混交林培肥土壤功能的比较研究。结果表明:与杉木纯林相比,营造枫香混交林后林地土壤的水分物理性质得到一定改善。由于混交林枯落物归还量及其分解速率高于杉木纯林,使枫香混交林土壤的养分状况也得到明显改善,枫香 杉木、枫香 马尾松Pinus massoniana,枫香 鹅掌楸Liriodendron chinense混交林0~20 cm土层土壤有机质分别比杉木纯林提高5.19%,27.71%和17.75%。不同枫香混交林土壤的肥力状况明显优于杉木纯林。表4参9

Soil fertility improvement in mixed forests of Liquidambar formosana with other tree species

Comparing the soil fertility in mixed forests of Liquidambar formosana and other tree species with pure forest of Chinese fir(Cunninghamia lanceolata)through the method of sample plot investigation,the results showed that the soil structure and water physical properties were improved in the mixed forests of Liquidambar formosana and other species compared with pure Chinese fir forest.Since the litter production and its decomposition rate of broad leaved tree forests were higher than those of Chinese fir forest,the soil nutrient in mixed forests was improved significantly.The organic matters in 0-20 cm soil layer in the mixed forests of Liquidambar formosana and Cunninghamia lanceolata,Liquidambar formosana and Pinus massoniana,Liquidambar formosana and Liriodendron chinense were increased by 5.19%,27.71% and 17.75% respectively compared with that of pure Chinese fir forest.