闽南混交林营造及种间关系调整效果分析

Analysis on the effect of establishment and inter-species relationship adjustment of mixed stands in southern Fujian.

闽南混交林营造和种间关系调整试验表明,主林木中以火力楠、福建柏和湿地松3个树种为佳,伴生树种以马尾松和台湾相思为宜,尤以马尾松的辅助作用更强,而台湾相思作为伴生树种改良地力作用更好。以改良地力、生产力和木材产量为评价指标,应用层次分析法对4种林木混交林模式进行多目标层次选择,结果表明火力楠×马尾松-插花配置-强度疏伐的混交模式综合效果最佳。

The experiment on the establishment and inter-species relationship adjustment of mixed stands showed that Michelia macclurei Dandy,Fokienia hodginsii (Dunn) henryet Thomas and Pi-nus elliotottii Engelm were the good dominant species,while Pinus massoniana Lamb. and Acacia confnas Merr. were the good associated species. Pinus massoniana Lamb. could greatly help the dominant species growth ,while Acacia confnas Merr. was a good species for soil fertility improve-ment because it could fix nitrogen. The soil fertility improvement, productivity and timber yield were selected as the three evaluation indexes to conduct multiple-purposes layer option analysis on these four models of mixed stands by applying layer analysis method. The results showed that the best mixed stand model was Michelia macclurei Dandy mixed with Pinus massoniana Lamb. in cross disposition with the management measure of intensive thinning.