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为了给四季竹(Oligostachyum lubricum)高效培育的林分结构建立提供理论依据,对立竹胸径基本一致的4种立竹密度(24600～29800株·hm-2,D1;37500～42600株·hm-2,D2;46500～52800株·hm-2,D3;76500～85500株·hm-2,D4)四季竹纯林进行了1～3a立竹地上生物量积累、分配与异速生长模式的研究。结果表明:四季竹立竹构件生物量分配比例秆>叶>枝。随着立竹年龄增大,不同密度的四季竹林立竹秆、枝、叶生物量和地上生物量及叶/枝、叶/秆、枝/秆构件生物量比总体上均呈增大趋势,且2a、3a立竹显著高于1a立竹,枝、叶生物量分配比例呈升高趋势,而秆生物量分配比例呈下降趋势。随着立竹密度增大,1～3a立竹地上生物量、构件生物量总体上呈“∧”型变化,D1～D3密度时逐渐升高,D4密度时显著下降,各年龄立竹枝、叶生物量分配比例降低,而秆生物量比例增大,叶/枝、叶/秆、枝/秆生物量比总体上1a立竹呈倒“N”型变化,2a、3a立竹呈下降趋势。叶-枝构件生物量符合近等速增长模式,异速生长指数随密度的增大而小幅度下降,叶-秆、枝-秆构件生物量符合简单异速增长模式,异速生长指数随密度的增大分别呈升高、先升高后降低的变化趋势。研究表明,当超出一定密度时(D2密度以上),四季竹立竹生物量分配更趋向于支撑构件(秆),以促进立竹纵向生长来获取更多的光资源;46500～52800株·hm-2是试验四季竹林立竹生物量高效积累和有效分配的密度。
In order to provide a theoretical basis for the establishment of stand structure for the efficient cultivation of Oligostachyum lubricum, four stand density (24600 ~ 29800 plants · hm-2, D1; 37500 ~ 42600 plants · hm-2) , D2; 46500 ~ 52800 plants · hm-2, D3; 76500 ~ 85500 plants · hm-2, D4) were used to study the aboveground biomass accumulation, distribution and allometric growth patterns of Pinus tabulaeformis plantations. The results showed that the proportion of biomass allocation of four-leaved bamboo stand components was> stalk> leaf> branch. With the increasing age of standing bamboo, biomass of biomass, aboveground biomass and leaf / branch, leaf / stalk, branch / stalk biomass of bamboo with different densities in all seasons increased. And the root biomass of 2a and 3a stands was significantly higher than that of stand 1a, the proportion of biomass of branches and leaves showed an increasing trend, while the proportion of stalk biomass showed a decreasing trend. With the increase of standing bamboo density, the aboveground biomass and component biomass of 1 ~ 3a stand varied from “∧” to “∧”, with increasing density at D1 ~ D3 and decreasing at D4 density. , The proportion of leaf biomass decreased and the proportion of stalk biomass increased. The biomass of leaf / branch, leaf / stalk, branch / stalk was changed to “N” Showing a downward trend. The leaf biomass of leaves and branches accorded with the nearly equal growth pattern, and the allometric growth index decreased slightly with the increase of density. The biomass of leaf-stem and branch-stalk complied with simple allometric growth pattern, Increase, respectively, increased, then increased and then decreased. The results showed that when the density exceeded (above the density of D2), the biomass allocation of Rhizophora stylosa tended to support members (stalks) to promote vertical growth of Rhizophora length to obtain more light resources; 46500 ~ 52800 plants · hm -2 is the density of effective accumulation and efficient distribution of three-year-old bamboo standing bamboo biomass.