Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.09.008 |
Effect of particle aging on chemical characteristics, smoldering, and fire behavior in mixed-conifer masticated fuel | |
Sikkink, Pamela G.1; Jain, Theresa B.1; Reardon, James2; Heinsch, Faith Ann2; Keane, Robert E.2; Butler, Bret2; Baggett, L. Scott3 | |
2017-12-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 405 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Mastication is a silvicultural technique that grinds, shreds, or chops trees or shrubs into pieces and redistributes the biomass onto the forest floor to form a layer of woody debris. Unlike other fuel treatments that remove this biomass, masticated biomass often remains on site, which increases total fuel loading and causes concern over how the masticated particles may burn if exposed to prescribed fire or wildfire. Central to the question of how these particles may burn is how the time since mastication affects the decomposition of the wood particles comprising the fuels. We conducted controlled laboratory experiments to investigate how the particles changed chemically over the time since they were masticated and how those chemical changes affected fire behavior characteristics. The objectives were (1) to quantify the chemical differences of masticated materials from different climates and different decomposition stages, (2) determine whether chemical changes occurred similarly in all fuel particles, and (3) describe the fire behavior characteristics exhibited by these fuels. Masticated materials came from mixed-conifer forests at fifteen different sites throughout the Rocky Mountains. Paired stands from these sites were of similar vegetation and forest stage. They represented wet and dry climates, different stages of wood decomposition, and variable piece sizes based on the type of machine used to masticate the biomass. Time since mastication and piece size affected the rate of chemical changes in the masticated particles. Fragmented particles had less heat value, N, and C than intact particles from the same site. C decreased and N increased with time since treatment. In most cases, cellulose decreased as decomposition occurred. Age of the particles, tree species, climate, and quantity of fuel load were all important factors influencing chemical change and burn characteristics. In the smoldering experiments, age was not a significant factor but soil substrate was. Soil surface temperatures in the smoldering tests differed significantly between dry sand and dry duff, and most of the smoldering burns in dry duff easily reached temperatures and durations at the surface between the fuel and the soil that would kill soil plants, microbes, and fauna and severely affect soil ecology. When planning prescribed burns in these treatments, managers need to consider not only the moisture of the fuels, air temperature, and wind, but also the dryness and type of soil, the amount of decomposition (time since mastication) of the fuel particles, fuel depths, fuel loads, and the spatial distribution of the fuel loads left by the masticator. |
英文关键词 | Fuel management Fuel treatments Silviculture Wood decomposition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413878500014 |
WOS关键词 | COARSE WOODY DEBRIS ; SOIL-WATER CONTENT ; DECOMPOSITION ; NITROGEN ; FORESTS ; LIGNIN ; CARBON ; DEGRADATION ; FUNGI ; PLOTS |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23665 |
专题 | 气候变化 |
作者单位 | 1.US Forest Serv, USDA, Rocky Mt Res Stn, Forestry Sci Lab, 1221 South Main St, Moscow, ID 83843 USA; 2.US Forest Serv, USDA, Rocky Mt Res Stn, Fire Sci Lab, 5775 W US Highway 10, Missoula, MT 59808 USA; 3.US Forest Serv, USDA, Rocky Mt Res Stn, 240 West Prospect, Ft Collins, CO 80256 USA |
推荐引用方式 GB/T 7714 | Sikkink, Pamela G.,Jain, Theresa B.,Reardon, James,et al. Effect of particle aging on chemical characteristics, smoldering, and fire behavior in mixed-conifer masticated fuel[J]. FOREST ECOLOGY AND MANAGEMENT,2017,405. |
APA | Sikkink, Pamela G..,Jain, Theresa B..,Reardon, James.,Heinsch, Faith Ann.,Keane, Robert E..,...&Baggett, L. Scott.(2017).Effect of particle aging on chemical characteristics, smoldering, and fire behavior in mixed-conifer masticated fuel.FOREST ECOLOGY AND MANAGEMENT,405. |
MLA | Sikkink, Pamela G.,et al."Effect of particle aging on chemical characteristics, smoldering, and fire behavior in mixed-conifer masticated fuel".FOREST ECOLOGY AND MANAGEMENT 405(2017). |
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