Evaluating Forest Biomass Recovery in South Central Alabama Pine Plantations

编号 030020705

推送时间 20191007

研究领域 森林经理 

年份 2019 

类型 期刊 

语种 英语

标题 Evaluating Forest Biomass Recovery in South Central Alabama Pine Plantations

来源期刊 FOREST SCIENCE

期 第207期

发表时间 20190304

关键词 Pinus taeda;  forest biomass;  residue distribution;  residue quantification;  recovery efficiency; 

摘要 Improved use of forest biomass has been presented as a viable option to satisfy a portion of the demand for sustainable alternative sources of energy. Yet, there are considerable gaps in our understanding related to the efficiencies of current state-of-the-art forest biomass recovery systems. Southern pine plantation biomass stands typically exhibit higher stand densities and smaller-diameter trees than conventional stands, which, in turn, may result in reduced recovery efficiencies. In this study, the impact of new harvest systems for biomass recovery was investigated in typical southern pine plantation biomass harvests. Specifically, spatial and temporal effects on residue distribution were examined following biomass harvest of 14- and 24-year-old loblolly pine plantations. Preharvest total standing biomass for the younger site at 90 tac(-1) (220 t hectare(-1)) was half that of the older site at 160 tac(-1) (390 t hectare(-1)). Although the analysis detected no significant temporal effects on residue distributions, the preharvest condition exhibited 100 percent ground cover, whereas postharvest conditions had nearly 20 percent of the area designated as bare. Two of the five residue classifications, light debris and litter-herbaceous, were found to have a significantly higher incidence of occurrence than the other residue classifications on the sites based on a multinomial regression. In general, we found recovery efficiencies for both sites of 80 percent or greater for both methods of determination, by destructive sampling and based on load tickets.

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