杉木火力楠混交林群落生产力的研究

本文在六年生不同混交比的杉木,火力楠混交林每木调查的基础上,选择杉木(3):火力楠(1)混交林为代表,并以杉木纯林和火力楠纯林为对照,对不同林分群落的生产力进行了测定和分析,结果表明:(1)不同混交比的杉木火力楠混交林的蓄积量均比杉木和火力楠纯林高,其中以杉木(3),火力楠(1)林分蓄积量最高,(2)混交林中林木的单株生物量,年净生产量均比纯林高,长势比纯林好;(3)混交林林分总生物量,年净生产量均比杉木纯林高,特别是干材净生产量比杉木纯林高1.16T/ha.a,这对经营用材林是十分有利的。

A study on the Community Productiveness of A mixed stand of Cunninghamia Lanceolata and Michelia Macclurei

This paper deals with the community productiveness of 6-yr old mixed stands in different proportions of the component species based on the data of the individual survey.The results showed that 1. The yields of all the mixed stands were higher than the pure stands of Cunninghamia lanceolata and Michllia macclurei, where the highest yield was the mixed stand in proportion as three ( Cunninghamia lanceolata )to one ( Michelia macclurei). 2. The biomass and net annual product-ion of the individual in the mixed stand excelled the pure stands. And the grow trend of the individual was better than the pure stands. 3. The total biomass and net annual production of the mixed stand were higher than the pure stand of Cunninghamia lanceolata. Particularly net production of stem of the mixed stand was 1.16T/ha higher than the pure stand of C. lanceolata. It is ve-ry favorable to managing the stand of the timber trees.