气候变化领域集成服务门户(CCPortal): Sustained productivity of intensively managed loblolly pine plantations: Persistence of fertilization and weed control effects across rotations

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DOI	10.1016/j.foreco.2019.05.025
	Sustained productivity of intensively managed loblolly pine plantations: Persistence of fertilization and weed control effects across rotations
	Subedi P.; Jokela E.J.; Vogel J.G.; Martin T.A.
发表日期	2019
ISSN	0378-1127
起始页码	38
结束页码	53
卷号	446
英文摘要	Two randomized complete block design experiments were used to study the effects of fertilization and weed control treatments on the productivity of second rotation loblolly pine (Pinus taeda L.) plantations growing on poorly-drained Spodosols in north Florida. One experiment (actively managed retreated) received similar treatments as in the first rotation (Control, C; Fertilizer, F; Fertilizer + weed control, FW; Weed control, W), and the second was left untreated in the second rotation [untreated carryover (C-): CC, CF, CFW, and CW]. Comparisons of total height and current annual increment across rotations indicated that the second-rotation stands were more productive than the first-rotation. In the current rotation of the untreated carryover experiment, treatments that received fertilizer in the first rotation (CF and CFW) accumulated significantly more aboveground biomass compared to the CC treatment [i.e. CF (63 Mg ha−1) = CFW (60 Mg ha−1) > CC (40 Mg ha−1)]. From the third to the fourth year, biomass accumulation in CF exceeded CFW, but by the fifth to the seventh years the two treatments were similar; a change that likely occurred because of root development into the lower solum for the CFW or increased understory competition in the CF treatment. In the actively managed retreated experiment, cumulative total aboveground biomass accumulation followed the trend: FW (90.6 Mg ha−1) > F (71.8 Mg ha−1) > W (55.1 Mg ha−1) > C (31.8 Mg ha−1). Comparison of upper quartile height gains due to fertilization between the first- and second- rotation experiments suggested that fertilizer added in the second rotation only provided growth gains after the fourth year. Our results suggest that management practices enhanced levels of productivity across treatments and rotations with some adjustment caused by carryover effects from past fertilization and weed control treatments. © 2019 Elsevier B.V.
英文关键词	Loblolly pine; Long-term productivity; Multi-rotational study; Nutrient use efficiency; Spodosols
语种	英语
scopus关键词	Biomass; Fertilizers; Forestry; Magnesium; Productivity; Rotation; Soils; Current annual increments; Loblolly pine; Loblolly pine (pinus taeda l.); Loblolly pine plantations; Multi-rotational study; Nutrient-use efficiencies; Spodosols; Sustained productivity; Weed control; aboveground biomass; coniferous tree; crop production; crop rotation; fertilizer application; growth; management practice; nutrient use efficiency; persistence; Spodosol; understory; weed control; Biomass; Fertilizers; Forestry; Magnesium; Productivity; Rotation; Florida [United States]; United States; 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/155941
作者单位	School of Forest Resources and Conservation, University of Florida, Gainesville, FL, United States
推荐引用方式 GB/T 7714	Subedi P.,Jokela E.J.,Vogel J.G.,et al. Sustained productivity of intensively managed loblolly pine plantations: Persistence of fertilization and weed control effects across rotations[J],2019,446.
APA	Subedi P.,Jokela E.J.,Vogel J.G.,&Martin T.A..(2019).Sustained productivity of intensively managed loblolly pine plantations: Persistence of fertilization and weed control effects across rotations.Forest Ecology and Management,446.
MLA	Subedi P.,et al."Sustained productivity of intensively managed loblolly pine plantations: Persistence of fertilization and weed control effects across rotations".Forest Ecology and Management 446(2019).