DOI: 10.1016/j.foreco.2017.06.016
Scopus记录号: 2-s2.0-85020432990
论文题名: Establishment phase productivity of loblolly pine and switchgrass when grown across a gradient of cultural treatment and site productivity
作者: Krapfl K.J. ; Roberts S.D. ; Hatten J.A. ; Baldwin B.S. ; Rousseau R.J. ; Shankle M.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 400 起始页码: 228
结束页码: 237
语种: 英语
英文关键词: Bioenergy
; Forest management
; Interspecific competition
; Panicum virgatum
; Pinus taeda
Scopus关键词: Plants (botany)
; Productivity
; Vegetation
; Bio-energy
; Competitive effects
; Competitive interactions
; Inter-specific competitions
; Intercropping systems
; Loblolly pine (pinus taeda l.)
; Panicum virgatum
; Pinus taeda
; Forestry
; bioenergy
; coniferous tree
; field method
; forest management
; grass
; intercropping
; interspecific competition
; monoculture
; productivity
; Mississippi
; United States
; Panicum virgatum
; Pinus taeda
英文摘要: A three-year field study was established to evaluate the production potential of an intercropping system of loblolly pine (Pinus taeda L.) and switchgrass (Panicum virgatum L.) in the southeastern United States. Tree-grass competitive interactions are expected to negatively affect overall productivity within this system, but a better understanding of these relationships will aid in developing cultural practices to mitigate competitive effects. We hypothesized that interspecific competitive interactions would decrease the productivity of both species within this system. We also hypothesized that productivity declines, due to interspecific competition, could be mitigated through management. We established loblolly pine and switchgrass intercropping systems at varying rates of competitive intensity initiated by cultural practices (pine only, switchgrass only, pine planted directly into switchgrass, pine planted into a 1.2 m vegetation removal zone, and pine planted into a 2.4 m vegetation removal zone) at two sites in northeastern Mississippi. Over the study duration, we observed decreased production in loblolly pine due to switchgrass competition. However, the establishment of 1.2 or 2.4 m vegetation removal zones surrounding pine seedlings allowed for tree growth equal to or greater than the pine only control at both sites. Likewise, intercropped switchgrass production was equal to or greater than the switchgrass only treatment by year 3 due to an apparent edge effect occurring at the tree-grass interface. Our results demonstrate that cultural practices intended to reduce interspecific competition were effective in mitigating productivity declines of intercropped loblolly pine while preserving or increasing switchgrass productivity. The dual-species productivity gains observed in this study advocate the loblolly pine-switchgrass intercropping system as a possible alternative to switchgrass monoculture. This study only examined production dynamics during the initial three growing years of this system and further research is needed to elucidate productivity patterns throughout the rotation. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64259
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forestry, Mississippi State University, Mississippi StateMS, United States; Department of Forest Engineering, Resources, and Management, Oregon State University, Corvallis, OR, United States; Department of Plant and Soil Sciences, Mississippi State University, Mississippi StateMS, United States
Recommended Citation:
Krapfl K.J.,Roberts S.D.,Hatten J.A.,et al. Establishment phase productivity of loblolly pine and switchgrass when grown across a gradient of cultural treatment and site productivity[J]. Forest Ecology and Management,2017-01-01,400