GSTDTAP  > 气候变化
DOI10.1016/j.foreco.2017.06.016
Establishment phase productivity of loblolly pine and switchgrass when grown across a gradient of cultural treatment and site productivity
Krapfl, Kurt J.1; Roberts, Scott D.1; Hatten, Jeff A.2; Baldwin, Brian S.3; Rousseau, Randall J.1; Shankle, Mark W.3
2017-09-15
发表期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
出版年2017
卷号400
文章类型Article
语种英语
国家USA
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 switch grass 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. (C) 2017 Elsevier B.V. All rights reserved.


英文关键词Bioenergy Forest management Interspecific competition Pinus taeda Panicum virgatum
领域气候变化
收录类别SCI-E
WOS记录号WOS:000406732100024
WOS关键词SOUTHERN UNITED-STATES ; DOUGLAS-FIR SEEDLINGS ; LOWER COASTAL-PLAIN ; WOODY WEED-CONTROL ; BIOENERGY FEEDSTOCK ; COMPETITION CONTROL ; VEGETATION CONTROL ; PANICUM-VIRGATUM ; SOIL CARBON ; NITROGEN
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/24037
专题气候变化
作者单位1.Mississippi State Univ, Dept Forestry, Mississippi State, MS 39762 USA;
2.Oregon State Univ, Dept Forest Engn Resources & Management, Corvallis, OR 97331 USA;
3.Mississippi State Univ, Dept Plant & Soil Sci, Mississippi State, MS 39762 USA
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GB/T 7714
Krapfl, Kurt J.,Roberts, Scott D.,Hatten, Jeff 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,2017,400.
APA Krapfl, Kurt J.,Roberts, Scott D.,Hatten, Jeff A.,Baldwin, Brian S.,Rousseau, Randall J.,&Shankle, Mark W..(2017).Establishment phase productivity of loblolly pine and switchgrass when grown across a gradient of cultural treatment and site productivity.FOREST ECOLOGY AND MANAGEMENT,400.
MLA Krapfl, Kurt J.,et al."Establishment phase productivity of loblolly pine and switchgrass when grown across a gradient of cultural treatment and site productivity".FOREST ECOLOGY AND MANAGEMENT 400(2017).
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