气候变化领域集成服务门户(CCPortal): Belowground processes for two loblolly pine (Pinus taeda L.) families respond differently to the intensity of plantation management

CCPortal

DOI	10.1016/j.foreco.2019.03.041
	Belowground processes for two loblolly pine (Pinus taeda L.) families respond differently to the intensity of plantation management
	Drum C.G.; Vogel J.G.; Gezan S.A.; Jokela E.J.
发表日期	2019
ISSN	0378-1127
起始页码	293
结束页码	301
卷号	441
英文摘要	Intensive forest management (fertilization, weed control) and the planting of fast-growing families of loblolly pine (Pinus taeda L.) can dramatically increase the rate of tree biomass accumulation, but it is unclear how tree genetics and management intensity interact to affect belowground processes. For 2.5 years in a 10–12-year-old plantation in north central Florida, we examined ecosystem carbon (C) accumulation, soil respiration (SR), total belowground C flux (TBCF), and litterfall in forests receiving different levels and types of fertilizer and weed control treatments that effectively reflected a contrast in ‘high’ vs. ‘operational’ management intensity. A fast-growing family was compared with a slower-growing family using single-family block plots. Applying high intensity silviculture treatments significantly (p < 0.05) increased C accumulation in aboveground biomass on average by 55% (20.9 Mg C ha −1 ) relative to less intensive silviculture, and the fast growing family accumulated 14% (6.3 Mg C ha −1 ) more C than the slower growing family at the end of 12 years. For the organic layer C, the high intensity silvicultural treatments significantly (p = 0.02) increased C accumulation (9.0 Mg C ha −1 ) and biomass increment (p = 0.04, 0.7 Mg C ha −1 y −1 ); however, the family treatment was not significant (p > 0.05) for either annual increment or organic horizon C. In contrast, the response of belowground C dynamics to silvicultural intensity were family specific, with the fast-growing family having significantly (p < 0.001) greater SR and TBCF under the operational treatment, while the slow-growing family showed no change in allocation with silvicultural intensity. The faster growing family also concentrated SR on its mounded planting bed position under the low silvicultural intensity, potentially making it better adapted to receiving silvicultural treatments concentrated near the tree base. These results suggest that loblolly pine's C allocation belowground could be a characteristic to use for selecting pine families for greater growth potential, compatibility with silvicultural practices, or as a means to affect ecosystem C accumulation. © 2019 Elsevier B.V.
英文关键词	Allocation; Soil respiration; Total belowground carbon flux
语种	英语
scopus关键词	Biomass; Ecosystems; Forestry; Weed control; Allocation; Carbon fluxes; Intensive forest management; Intensive silvicultures; Loblolly pine (pinus taeda l.); Silvicultural practices; Silvicultural treatments; Soil respiration; C (programming language); aboveground biomass; biomass allocation; carbon flux; coniferous tree; forest management; forestry practice; growth; plantation; plantation forestry; silviculture; soil respiration; Accumulation; Biomass; Distribution; Ecosystems; Forest Management; Forestry; Intensity; Weed Control; Florida [United States]; United States; Pinaceae; Pinus taeda
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156030
作者单位	University of Florida, School of Forest Resources and Conservation, Gainesville, FL, United States
推荐引用方式 GB/T 7714	Drum C.G.,Vogel J.G.,Gezan S.A.,et al. Belowground processes for two loblolly pine (Pinus taeda L.) families respond differently to the intensity of plantation management[J],2019,441.
APA	Drum C.G.,Vogel J.G.,Gezan S.A.,&Jokela E.J..(2019).Belowground processes for two loblolly pine (Pinus taeda L.) families respond differently to the intensity of plantation management.Forest Ecology and Management,441.
MLA	Drum C.G.,et al."Belowground processes for two loblolly pine (Pinus taeda L.) families respond differently to the intensity of plantation management".Forest Ecology and Management 441(2019).