DOI: 10.1016/j.foreco.2017.06.011
Scopus记录号: 2-s2.0-85020388380
论文题名: Water quality effects of short-rotation pine management for bioenergy feedstocks in the southeastern United States
作者: Griffiths N.A. ; Jackson C.R. ; Bitew M.M. ; Fortner A.M. ; Fouts K.L. ; McCracken K. ; Phillips J.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 400 起始页码: 181
结束页码: 198
语种: 英语
英文关键词: Concentrated flow tracks
; Intensive silviculture
; Interflow
; Nitrogen
; Short-rotation woody crops
; Surface water
Scopus关键词: Feedstocks
; Forestry
; Groundwater
; Nitrogen
; Nutrients
; Pesticides
; Potable water
; Pulp
; Quality control
; River pollution
; Rivers
; Rotation
; Surface waters
; Timber
; Water
; Water quality
; Water treatment
; Watersheds
; Best management practice (BMPs)
; Concentrated flow
; Drinking water standards
; Intensive silvicultures
; Interflow
; Pesticide concentrations
; Short-rotation woody crops
; Streamside management zone
; Nitrogen removal
; best management practice
; bioenergy
; coniferous tree
; disturbance
; forestry production
; nitrogen
; renewable resource
; silviculture
; surface water
; timber
; water quality
; Evaluation
; Farm Crops
; Management
; Pinus
; Renewable Resources
; United States
; Pinus taeda
英文摘要: Growing interest in renewable and domestically produced energy motivates the evaluation of woody bioenergy feedstock production. In the southeastern U.S., woody feedstock plantations, primarily of loblolly pine (Pinus taeda), would be intensively managed over short rotations (10–12 years) to achieve high yields. The primary differences in managing woody feedstocks for bioenergy production vs for pulp/sawtimber production include a higher frequency of pesticide and fertilizer applications, whole-tree removal, and greater ground disturbance (i.e., more bare ground during stand establishment and more frequent disturbance). While the effects of pulp/sawtimber production on water quality are well-studied, the effects of growing short-rotation loblolly pine on water quality and the efficacy of current forestry Best Management Practices (BMPs) have not been evaluated for this emerging management system. We used a watershed-scale experiment in a before-after, control-impact design to evaluate the effects of growing loblolly pine for bioenergy on water quality in the Upper Coastal Plain of the southeastern U.S. Intensive management for bioenergy production and implementation of current forestry BMPs occurred on ∼50% of two treatment watersheds, with one reference watershed in a minimally managed pine forest. Water quality metrics (nutrient and pesticide concentrations) were measured in stream water, groundwater, and interflow (i.e., shallow subsurface flow) for a two-year pre-treatment period, and for 3.5 years post-treatment. After 3.5 years, there was little change to stream water quality. We observed a few occurrences of saturated overland flow, but sediments and water dissipated within the streamside management zones in over 75% of these instances. Stream nutrient concentrations were low and temporal changes mainly reflected seasonal patterns in nitrogen cycling. Nitrate concentrations increased in groundwater post-treatment to <2 mg N L−1, and these concentrations were below the U.S. drinking water standard (10 mg N L−1). Applied pesticides were almost always below detection in streams and groundwater. Overall, these findings highlight that current forestry BMPs can protect stream water quality from intensive pine management for bioenergy in the first 3.5 years. However, groundwater quality and transit times need to be considered in these low-gradient watersheds of the southeastern U.S. that are likely to become an important location for woody bioenergy feedstock production. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64255
Appears in Collections: 影响、适应和脆弱性
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作者单位: Climate Change Science Institute and Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; USDA-ARS Southwest Watershed Research, Tucson, AZ, United States
Recommended Citation:
Griffiths N.A.,Jackson C.R.,Bitew M.M.,et al. Water quality effects of short-rotation pine management for bioenergy feedstocks in the southeastern United States[J]. Forest Ecology and Management,2017-01-01,400