摘要
根据不同密度林分的资料,用"相对生长测定法"(Allometricmethod),对下蜀森林生态定位站9年生火炬松人工林的生物量进行了测定,比较了不同密度火炬松林分的生物量及其在各组分间的分配.结果表明,合理密植能够提高火炬松林的生物量,但过密的效果则适得其反;下蜀生态定位站9年生火炬松人工林现存量为49.28～78.79t/hm2,净生产力为15.57～25.58t·hm-2·a-1;生物量各组分的分配,干、枝、叶、根分别为42%,21%,12%和24%;连年生长量和平均生长量随年龄增加而增加,连年生长量一直大于平均生长量,林分处于速生阶段.
By using allometric method,the biomass and its allocation of 9 years old different density loblolly pine plantations are studied in hilly region of southern JiangsuIt shows that a rational density is necessary to promote loblolly pine biomass,but too high density can lead to low biomass;the experiment telled us that the planted loblolly pine existing biomass at Xiashu biological positioning station is in the arrange of 4928～7879 ton per hm2,and hold a net yearly productivity of 1557～2558 ton per hm2;the distribution of biomass in trunk and branch and leaf and root is respectively 42%,21%,12% and 24%.The yearly growing and average growing quantity are both increasing with tree ages increase,and the latter is bigger;so the forest unit is still in rapid growth period.
出处
《福建林学院学报》
CSCD
北大核心
2003年第2期182-185,共4页
Journal of Fujian College of Forestry
基金
国家林业局下蜀生态定位站科学基金资助项目(900807).
