Abstract:

The article is about the preliminary research of the plant biomass and production of an elabrate middle-age stand (Pinus fenzeliana) at an elevation for 930 m. By using "average standard tree" and "divided storeys" methods. The biomass and production of the trees such as sampling undergrowth, living planters and dead branches and leaves were studied. The following regression equations were derived. The result of analysis shows

Lg Wtrunk = 0.689628 Lg (D2H) - 0.73557

Lg Wbark = 0.395292 Lg (D2H) - 0.555636

Lg Wbranch = 0.663534 Lg(D2H) - 1.096486

Lg Wleaf = 0.653243 Lg(D2H) - 1. 400558

Lg Wroot=0.634176 Lg(D2H)-l.046108

The estimated total biomass of P. fenzeliana forest community is 161.152 t/ha, productivity 10630.69 kg/ha·a, Total aboveground biomass of P. fenzeliana is 149.35 t/ha, productivity 11095 kg/ha·a, in which the percentages of trunk, bark,branches,leaves and roots are 49.86 %, 8.21%,17.86 %, 8.09% and 15.98% respectively. The biomass percentages of P. fenzeIiana tree, sampling undergrowth and living plant covers and dead branches and leaves are 92.67%, 3.17%, 0.57% and 3.59% respectively. Leaf area is 199248.74 m2/ha, leaf area index (LAI) is 19.9149.