桉树福建柏混交造林效果分析

Analysis on The Afforestation Effects of Eucalyptus robusta and Fokienia hodginsii Mixed Plantation

为了探索闽南地区桉树人工林混交造林模式,2010年在福建省安溪白赖国有林场开展了桉树福建柏混交(混交比例为2桉∶8福建柏)造林试验,并与桉树纯林、福建柏纯林对比。5 a的试验结果表明:混交林中桉树胸径、树高、材积的生长量都大于桉树纯林,增益可达39.2%、16.1%、109.5%以上;混交林中福建柏的平均胸径、平均树高、单株材积生长分别比纯林减少了25.9%、10.7%、46.8%,但树高生长也超过速丰林标准的14.7%。说明桉树与福建柏混交存在着生长相互促进作用,是种间关系较为协调并且具有较高生产力的混交模式,可以在生产上推广应用。

In order to find out the Eucalyptus robusta plantation mixed afforestation pattern,a test planting of Eucalyptus robusta mixed with Fokienia hodginsii（ 30 Eucalyptus trees per mu） was established in Anxi Bailai State-owned Forest Farm of Fujian Province in 2010. Comparing with the pure Eucalyptus robusta forest and pure Fokienia robusta hodginsii forest,the test of the five years shows that the growth of the Eucalyptus robusta increases after the mixture with Fokienia hodginsii. The diameter of breast height,tree height and volume increment of the mixed Eucalyptus robusta forest are all bigger than that of the pure Eucalyptus robusta forest with the increase more than 39. 2% 、16. 1% 、109. 5% respectively. However,comparing with pure Fokienia hodginsii forest,the mean diameter of breast height,mean tree height and each tree volume increment of the mixed Fokienia hodginsii forest decrease 25. 9% 、10. 7% 、46. 8% respectively. The multi-storied stand of the mixed forest of Eucalyptus robusta and Fokienia hodginsii effectively improves the forest land utilization and promotes the growth of Eucalyptus robusta. Although the growth of Fokienia hodginsii decreases,the height growing exceeds 14. 7% above the standard of fast-growing and high-yielding forst. The indication shows the mixture of Eucalyptus robusta and Fokienia hodginsii promotes the mutual growing with better coordinated interspecies relation and higher productivity. This mixture pattern can be applied to production.