椽竹各器官生物量模型

Biomass models for Bambusa textilis var.tasca

对耐寒丛生竹种椽竹Bambusa textilis var.tasca种群的生物量结构进行了研究,并对其各器官生物量与胸径和平均壁厚的相关模型进行了拟合。结果表明:椽竹各器官生物量的分配中,竹秆所占比例最大,为总生物量的74.62%,远超过毛竹Phyllostachys pubescens等竹种的相应值。椽竹的胸径和平均壁厚与各器官生物量之间均呈极显著相关性,其中竹枝生物量干质量(Bt),竹叶生物量干质量(Bf),竹秆生物量干质量(Bs),地上部分生物量干质量(Ba),全竹生物量干质量(Wbt)与胸径(D)和平均壁厚(A)间相关关系的拟合模型分别Bt=-2 672.765+1 299.919D+59.298D2-36.222D3,Bf=-2 756.615+1 290.910D+95.822D2-34.991D3,Bs=-4 016.535+2 161.650D+21.755D2-45.453D3,Ba=-7 445.916+3 952.480D+45.439D2-96.666D3,Wbt=-7 360.122+3 933.155D+41.158D2-93.171D3,Bt=-1 914.129+739.465A+30.261A2-61.285A3,Bf=-3 342.800+1 228.745A-1.165A2-104.356A3,Bs=-6 103.838+1 790.994A+44.430A2-13.674A3,Ba=-9 770.036+2 464.708A+19.688A2-23.782A3,Wbt=-9 914.842+2 912.175A+25.624A2-23.513A3。根据以上公式估算出椽竹林单株平均秆生物量为1.52 kg.株-1,单株平均全竹生物量2.31 kg.株-1,单位面积秆生物量3.28 kg.m-2;单位面积全竹生物量4.96 kg.m-2。

The biomass of Bambusa textilis var.tasca was studied using regression models that were constructed for biomass components：bamboo pole-dry（Bt）,bamboo leaf-dry（Bf）,bamboo culm-dry（Bs）,aboveground part-dry（Ba）,and bamboo-dry（Wbt）;based on diameter at breast-high（DBH）（D）and the average thickness of the culm-base（A）.For the purpose of Bambusa textilis var.tasca rational operation and development to provide theoretical basis and basic data.Results showed that culm biomass of B.textilis var.tasca counted for 74.62%,which was much higher than Phyllostachys pubescens.Regression equations in terms of DBH were：Bt =-2 672.765 ＋ 1 299.919D ＋ 59.298D2-36.222D3,Bf =-2 756.615 ＋ 1 290.910D ＋ 95.822D2-34.991D3,Bs =-4 016.535 ＋ 2 161.650D ＋ 21.755D2-45.453D3,Ba =-7 445.916 ＋ 3 952.480D ＋ 45.439D2-96.666D3,and Wbt =-7 360.122 ＋ 3 933.155D ＋ 41.158D2-93.171D3,and in terms of A were：Bt =-1 914.129 ＋ 739.465A ＋ 30.261A2-61.285A3,Bf =-3 342.800 ＋ 1 228.745A-1.165A2-104.356A3,Bs =-6 103.838 ＋ 1 790.994A ＋ 44.430A2-13.674A3,Ba =-9 770.036 ＋ 2 464.708A ＋ 19.688A2-23.782A3,and Wbt =-9 914.842 ＋ 2 912.175A ＋ 25.624A2-23.513A3.With these equations,Bambusa textilis var.tasca had an average yield in stem biomass of 1.52 kg·plant-1;an average biomass bamboo of 2.31 kg·plant-1;a stem biomass per unit area of 3.28 kg·m-2;and a bamboo biomass of per unit area of 4.96 kg·m-2.View of the high yield of Bambusa textilis var.tasca,wood is better features,both for the development of Bambusa textilis var.tasca ease the current difficulties facing the bamboo industry,or the use of bamboo species diversity has important economic and ecological significance.[Ch,8 tab.29 ref.]