杉木与鹅掌楸混交造林效果初步研究

Study on Mixed Forest Effect of Cunninghamia lanceolata and Liriodendron chinense

为了解杉木与鹅掌楸混交效果,开展了杉木与鹅掌楸1∶1比例株间混交和7∶3比例插花混交试验,同时营造杉木纯林进行了对比。12 a生的试验林调查分析结果表明:杉木-鹅掌楸混交林与杉木纯林相比,杉木的树高、胸径均有不同程度的提高,杉木与鹅掌楸7∶3比例插花混交林中杉木的树高、胸径与杉木纯林之间均有显著差异,杉木与鹅掌楸1∶1比例株间混交林中杉木的树高、胸径与杉木纯林之间的差异不显著。杉木-鹅掌楸混交林土壤与杉木纯林土壤相比,土壤通透性增强,土壤中营养物质含量增加。杉木与鹅掌楸按7∶3比例插花混交比较合适。

The mixed forest effect of Cunninghamia lanceolata and Liriodendron chinense was carried out to understand the mixed effect of Cunninghamia lanceolata and Liriodendron chinense.The results of 12 ayear test stand indicated that comparation to pure stand of Cunninghamia lanceolata,the height and diameter of Cunninghamia lanceolata in mixed stand were improved.The height and diameter of Cunninghamia lanceolata in 7∶3 mixed stand of Cunninghamia lanceolata and Liriodendron chinense were obviously different to the pure stand of Cunninghamia lanceolata,but the difference of the height and diameter of Cunninghamia lanceolata in 1∶1 mixed stand and pure stand of Cunninghamia lanceolata was not obvious.The soil permeability and nutrient content of the mixed stand increased comparation to the soil of pure stand of Cunninghamia lanceolata.The model of Cunninghamia lanceolata and Liriodendron chinense 7∶3 odd mixed was suitable.