白水江自然保护区糙花箭竹天然林生物量与生产力的初步研究

A PRELIMINARY STUDY ON THE BIOMASS AND PRIMARY PRODUCTION OF A FARGESIA SCABRIDA FOREST IN THE BAISHUIJIANG NATURE RESERVE, GANSU PROVINCE

本文根据样方上测定糙花箭竹的地径、茎高、密度、茎重、枝条重、叶重和鞭系重资料,研究竹林生物量和生产力,并建立回归数学模型为: 茎重W_S=160.942+0.227(D^2NH) p<0.001 枝条重W_B=76.008+0.039(D^2NH) p<0.001 叶重 W_L=80.643+0.051(D^2NH) p<0.001 鞭系重W_R=285.554+0.074(D^2NH) p<0.001由方程估测出天然糙花箭竹林的各器官干重分别为茎7.558,枝条1.782,叶2.143,鞭系4.795t/ha。总生物量为16.278t/ha,平均净生产量为3.256t/ha。

The biomass and primary production of a natural Fargesia scabrida forest were determined based upon the regression models obtained by measuring the average basal diameter(D), density (N), plant height(H), and the dry weights of stems(W_s), branches(W_b), leaves(W_L) and rhizomes(W_R) of Fargesia sca- brida plants in the sampling quadrats. The regression models are as follows: W_s=160.942+0.227(D^2NH) P<0.001 W_B=76.008+0.039(D^2NH) P<0.001 W_L=80.643+0.051(D^2NH) P<0.001 W_R=285.554+0.074(D^2NH) P<0.001 By using these models, we calculated that the biomasses of stems, branc- bes, leaves and rhizomes were 7.558t/ha., 1.782t/ha., 2.143t/ha. and 4.795 t/ha., respectively. The total biomass was 16.278t/ha. The net primary pro- duction was estimated to be 3.256t/ha. /yr.