套种三年桐的杉木幼林生长效应和生物量结构

对４和５年生杉木幼林套种三年桐林分的生长效应、树冠和生物量结构、营养空间利用进行研究的结果表明：杉木幼林套种三年桐不仅促进杉木生长，而且也有利于三年桐的生长发育；通过套种三年桐，林分可提早１～２年郁闭，提高光能和土壤营养空间利用率；４和５年生套种林分的总生物量分别为纯林的１．２６和１．６１倍．

Study on Biomass Structure and Tree Growth Effect of Chinese Fir Interplanted with Tung Oil Tree

In this paper,the growth effect,structure of tree crown and biomass,nutrition space utilization of ground and underground of Chinese fir interplanted with tung oil tree at the age 4 and 5 have been studied.The results showed that both Chinese fir and tung oil tree grew better through interplanting that the pattern stand could be closing 1-2 years ahead of pure forest and raise the utilization rate of light energy and soil nutrient,and that the total biomass of interplanted forest stand at the age of 4 and 5 was 1. 59 and 1. 92 times that of pure forest,respectively,and the Chinese fir biomass in interplanted pattern was 1.26 and 1. 61 times that of pure forest,respectively.