闽南山地杉木与火力楠不同混交比例造林效果研究

Mixed Effect of Different Ratio of Cunninghamia lanceolata and Michelia macclurei in Fujian Southern Mountaion

通过杉木与火力楠分别按照9∶1和8∶2的比例混交造林,以杉木纯林为对照开展杉木与火力楠不同混交比例造林试验,研究杉木与火力楠混交的效果。试验结果:30年生时混交林中杉木的树高、胸径、单株材积和单位面积蓄积量与杉木纯林相比分别提高了12.5%～15.6%、10.1%～17.5%、34.1%～59.1%和19.1%～27.3%,混交林中杉木和纯林杉木的树高、胸径、单株材积和单位面积蓄积量均存在显著差异。杉木与火力楠混交林土壤与杉木纯林相比疏松透气、持水能力强,土壤有机质等营养物质含量高,土壤更肥沃。

Experiments of Cunninghamia lanceolata&Michelia macclurei with different ratios(9:1&8:2)were conducted compared by taking Cunninghamia lanceolata pure forest as control.Effect of mixed of Cunninghamia lanceolata&Michelia macclurei was studied.Result shows that the height,DBH,individual volume&stand volume respectively improve 12.5-15.6%,10.1-17.5%,34.1-59.1%&19.1-27.3%compared with the pure stand of Cunninghamia lanceolata.The difference of the above index of Cunninghamia lanceolata between the mixed stand and pure stand is obvious.The soil of mixed stand is looser than that of pure stand.The soil fertilizer of mixed stand is optimal than that of pure stand.