Biomass production of hybrid aspen growing on former farm land in Sweden

编号 zgly0000818189

文献类型 期刊论文

文献题名 Biomass production of hybrid aspen growing on former farm land in Sweden

作者 Tord  Johansson 

作者单位 Department  of  Energy  and  Technology 

母体文献 林业研究: 英文版 

年卷期 2013(2)

页码 237-246

年份 2013 

分类号 S 

关键词 basic  density  biomass  production  farmland  hybrid  aspen  MAI  plantation  forestry 

文摘内容 We construct dry weight equations for hybrid aspen growing on former farmland in Sweden. Dry weight equations for fractions of hybrid aspen trees were also made. We estimated biomass production in 24 stands. The stands were located in Sweden at latitudes ranging from 55 to 60o N. The mean age was 18 years (range 15-23), the mean stand density 1090 stems·ha-1 (range 378 2374), and the mean diameter at breast height (over bark) 178 mm (range 85 244 mm). Soil types in the hybrid aspen stands were mainly clay (21 stands), tills (2 stands) and other (1 stand). The mean total standing dry weight above stump level (≈ 200 mm) for the hybrid aspen stands was 135±53 t·ha-1 with a range of 42 219 t·ha-1 . In addition to estimating conventional dry weights of trees and tree components, basic density, specific leaf area (SLA), projected leaf area (PLA) and leaf area index (LAI) were estimated and were in agreement with published figures.