摘要
研究安徽大别山海拔1200m垂直地带黄山松天然林的能量及物质的积累与分配,并建立了生物量与胸径及树高关系的模型。林分年龄38a、密度2418株·hm-2。结果表明,该林分的生物现存量为204.8t·hm-2,平均生长量5.39t·hm-2·a-1,平均单株生长量为2.23kg·a-1;该林分生物量水平高于湖南的黄山松林分,与我国各气候区的主要针叶林分相比也处于较高的水平,但单株的生物量较低,如作为用材林经营则适当的密度控制十分重要。生物量的分配表明主干的88%分配在6.5m以下部分。由此看出,从木材生产或生态功能角度出发,黄山松均是华东地区山地中上部的优良树种。各类元素的积累与分配格局:黄山松每生产1t干物质平均需吸收N1.146kg,P(P2O5)0.253kg,K0.569kg,Ca1.163kg,Mg0.319kg,Zn0.014kg,Cu0.0002kg,Mn0.024kg,Fe0.027kg。
In the paper,the biomass, production and nutrient element of nature forest of Pinus taiwanensis,the major tree species native to mountains of southeastern area of China were studied,and the biomass models were built as well.The results showed that the stand of 38 years had 2418 individuals and biomass of 204 8 t·hm -2 ,the average production of the stand was 5 39 t·hm -2 ·a -1 , and 2 23 kg·a -1 for single tree. Compared to the nature forest of same species located in Hunan,the stand had higher production for stand but lower for single tree production.Compared with the major conifer forests in different climate zones in this country,the stand of P.taiwanensis was at medium and higher level.Since the stand had high density,the productivity for single tree was lower,therefore,the density management was very important.The biomass pattern showed that 88% of trunk biomass was allotted in the part of 0～6 5 m trunk.To produce 1 t of biomass,the amount of N(1 146 kg),P(P 2O 5) (0 253 kg),K (0 569 kg),Ca (1 163 kg),Mg (0 319 kg),Zn (0 014 kg),Cu (0 0002 kg),Mn (0 024 kg),Fe (0 027 kg) will be needed.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2003年第3期294-298,共5页
Journal of Anhui Agricultural University
关键词
黄山松
生物量
积累
分配
Pinus taiwanensis
biomass
accumulation
distribution
