黑木相思与不同树种混交试验研究

Experimental study of Acacia melanoxylon with different tree species

为比较黑木相思与其他树种的混交生长表现,选择3种不同的阔叶树种与其进行混交,形成不同的混交模式,与纯林进行对比。4.5年生时测定各树种树高、胸径、冠幅等生长情况。结果表明:(1)纯林与混交林中的黑木相思树高、胸径、冠幅和单株材积均存在显著性差异,除树高生长性状外,黑木相思混交林中的其他生长性状均比纯林生长表现好,说明4.5年生黑木相思单株生长情况混交比纯林表现好。(2)比较单位面积的蓄积量,纯林黑木相思>混交林黑木相思×黑金丝柚木>混交林黑木相思×白桂木>混交林黑木相思×小叶红豆,说明4.5年生黑木相思纯林总产量比混交林高。(3)黑木相思3种混交模式中,除冠幅生长性状外,黑木相思×黑金丝柚木模式的其他生长性状和蓄积量均表现最好,该研究3种混交模式中黑木相思×黑金丝柚木表现最佳。(4)比较白桂木、小叶红豆、黑金丝柚木纯林与混交林的生长表现,白桂木和黑金丝柚木纯林综合表现比混交林好,小叶红豆混交林与纯林表现无显著区别,建议纯林模式栽植白桂木和黑金丝柚木。

In order to compare the growth performance of Acacia melanoxylon with other tree species,three different broad-leaved tree specieswere chosen to plant with A.melanoxylon,to form different mixing modes by a comparison of pure plantation.The growth situations such as height,DBH and crownsize of each species were measured at the age of 4.5.The results showed that:(1)There were significant differences in the height,DBH,crownsize and individual volumebetween pure plantation and mixed plantation of A.melanoxylon.The DBH,crownsize and individual volume of the mixed plantationwere better than those of the pure plantation,which showed that the single plant growth performance of the mixed plantationwere better than that of the pure plantation of A.melanoxylon at the age of 4.5.(2)The comparison result of the volume per unit area of differentmodes is A.melanoxylon>A.melanoxylon×Tecton grandis>A.melanoxylon×Artocarpus hypargyreus Hance>A.melanoxylon×Ormosia mierophvlla,which showed that the total output of the pure plantation was higher than that of the mixed plantation at the age of 4.5.(3)The height,DBH,individual volume and the volume per unit of Acacia melanoxylon×Tecton grandis was the best of all three mixing modes.It is showed that the mode of A.melanoxylon×Tecton grandis performed were the best.(4)The comprehensive performance of pure plantation was better than that of mixed plantation of Artocarpus hypargyreus Hance and Tecton grandis,and the mixed plantation pure plantation performed of Ormosia mierophvlla had no significant difference.It is suggested to plant Artocarpus hypargyreus Hance and Tecton grandis in pure plantation mode.