Biomass distribution pattern of different parts of Pinus yunnanensis with different diameter class

Document Type

Article

Publication Date

2-1-2012

Abstract

The normal tree method was used to measure the biomass of Pinus yunnanensis and its distribution pattern with different diameter class in Tianzimiaopo Forest Farm, Nanhua County, Yunnan Province. The results indicated that the biomass was positively correlated with the diameter class. For the diameter class of 5 ~ 7.5 cm, the individual biomass was(6.642 ± 1.129) × 103 g, for the diameter class of 7.6 ~ 12.5 cm, it was(2.533 ± 0.387) × 10 g, for the diameter class of 12.6 ~ 17.5 cm, it was (5.897 ± 1.331) × 104 g, for the diameter class of 17.6 ~ 22.5 cm, it was (1.063 ± 0.211) × 105 g, and for the diameter class above 22.6 cm, it was (2.208 ± 0.409) × 10 g. There existed some changes in the biomass distribution among P. yunnanensis' organs with different diameter class. With the increase of diameter, the biomass proportion of stem and root decreased in initial stage and then increased, that of branch and needle increased in the initial stage and then decreased, while that of bark decreased. The biomass proportion of stem was the largest in layer of 0 ~ 2 m, which accounted for 27.62% of total biomass and that of the branch and needle were the largest in the layer of 6 ~ 8 m, which accounted respectively for 35.85% and 38.34% of the total biomass. Approximately 65.49% of total root biomass of P. yunnanensis distributed in the surface layer of 0 ~ 30 cm, and 34.51% in the other layers.

Publication Source (Journal or Book title)

Forest Research

First Page

71

Last Page

76

This document is currently not available here.

Share

COinS