气候变化领域集成服务门户(CCPortal): Impacts of timber harvest intensity and P fertilizer application on soil P fractions

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DOI	10.1016/j.foreco.2019.01.051
	Impacts of timber harvest intensity and P fertilizer application on soil P fractions
	Rocha J.H.T.; Menegale M.L.C.; Rodrigues M.; Gonçalves J.L.D.M.; Pavinato P.S.; Foltran E.C.; Harrison R.; James J.N.
发表日期	2019
ISSN	0378-1127
起始页码	295
结束页码	303
卷号	437
英文摘要	Research has shown significant effects of timber harvest residue management on soil organic carbon (SOC), but less impact has been observed on the available P pool. The objectives of this study were: (1) to estimate the effects of different timber harvest intensities and P fertilization on soil labile P and P fate over time; and (2) to identify which soil P fractions supply P to Eucalyptus plantations cultivated in soils with low P availability. P fractions were assessed using Hedley's sequential extraction methodology, which corresponds to differing degrees of soil P lability. Three timber harvest intensities (stemwood only, whole tree and whole tree plus litter) and two levels of P fertilization (0 and 44 kg ha −1 of P) were used. A total of 70% of total soil P was found in a non-labile form in the whole tree plus litter removal treatment, while in the whole tree treatment only 66% was found in this form. Removal of harvesting and litter residues resulted in a 40% reduction in the labile P fraction when compared to stemwood only harvested treatment even with fertilizer application. Acid phosphatase activity, which is crucial in mobilizing P for plant uptake, was 45% higher in soils that did not receive P fertilizer, but it did not resulted in higher concentration of labile P. Timber harvest intensity and P fertilizer application did not influence the soil total P concentration over 12 years of Eucalyptus cultivation. However, there was an increase in non-labile and inorganic P fractions and a reduction of labile and organic P fractions with increasing timber harvest intensity. The organic, moderately labile P fraction was the main source of P to the trees under low P availability conditions. Acid phosphatase and low molecular weight organic acid excretion seem to be important strategies of Eucalyptus species to improve P uptake. © 2019 Elsevier B.V.
英文关键词	Eucalyptus grandis; Forest residue management; Minimum tillage; P availability; Phosphorus fractionation
语种	英语
scopus关键词	Fertilizers; Forestry; Harvesting; Organic carbon; Phosphatases; Soils; Timber; Eucalyptus grandis; Forest residue; Minimum tillage; P availabilities; Phosphorus fractionation; Soil pollution; evergreen tree; fertilizer application; forest management; fractionation; organic carbon; phosphorus; sequential extraction; soil organic matter; tillage; timber harvesting; Acids; Eucalyptus Grandis; Fertilizers; Forestry; Fractions; Harvesting; Soil; Trees; Eucalyptus; Eucalyptus grandis
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/156151
作者单位	Forest Science Department, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, SP 13418-900, Brazil; Agriculture and Forest Engineering College, FAEF, Garça, SP, Brazil; School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195-2100, United States; Soil Science Department, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, SP 13418-900, Brazil
推荐引用方式 GB/T 7714	Rocha J.H.T.,Menegale M.L.C.,Rodrigues M.,et al. Impacts of timber harvest intensity and P fertilizer application on soil P fractions[J],2019,437.
APA	Rocha J.H.T..,Menegale M.L.C..,Rodrigues M..,Gonçalves J.L.D.M..,Pavinato P.S..,...&James J.N..(2019).Impacts of timber harvest intensity and P fertilizer application on soil P fractions.Forest Ecology and Management,437.
MLA	Rocha J.H.T.,et al."Impacts of timber harvest intensity and P fertilizer application on soil P fractions".Forest Ecology and Management 437(2019).