杉木蓝果树混交林林分生产力及生态效应研究

Study on the Productivity and Ecological Benefits in Mixed Forests of Cunninghamia lanceolata and Nyssa sinesis

从林分结构、生物量、群落特征、生产力、培肥土壤、涵养水源及林内小气候等方面对不同混交模式的杉木蓝果树混交林及其纯林进行的研究结果表明:杉木蓝果树是具有较高生产力和协调种间关系能力的针阔混交树种。7年生3︰1杉木蓝果树带状混交林蓄积量和生物量分别比杉木纯林提高7.24%和18.22%,同时混交林还表现出比杉木纯林更好的培肥土壤、涵养水源、改善林内小气候等生态功能。结果表明:3︰1杉木蓝果树带状模式是值得南方林区大力推广的杉阔混交模式。

The different mixed of Cunninghamia lanceolata and Nyssa sinesis and their pure forests were studied in this paper by comparing the stand structure, biomass, community character, productivity and ecological benefits. The results showed that the mixed forests of C.lanceolata and N.sinesis were a new mixed model having higher productivity mixed forest（3 C.lanceolsts and 1 N.sinesis） increased by 7.24% and 18.22% than those of the pure stands respectively. Moreover, the mixed forests had better ecological function to ameliorate soil fertility, conserving water and improving microclimate than the pure forests. It was recognized that the mixed forest of 3 C.lanceolata with 1 N.sinesis was a practicable mixed model in southern China.