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

The experiment on the establishment and inter-species relationship adjustment of mixed stands showed that Michelia marclurei Dandy，Fokienia hodginsii(Dunn)henryet Thomas and Pinus elliotottii Engelm were the good dominant species．while Pinus massoniana Lamb. and Acacia confnas Merr．were the good associated species．Pinus taassoniana Lamb．could greatly help the dominant species growth，while Acacia confnas． Merr．was good species for soil fertility improvemerit because it could fix nitrogen．The soil fertility improvement，productivity and timber yield were sdected 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.