气候变化领域集成服务门户(CCPortal): Nitrogen cycling in monospecific and mixed-species plantations of Acacia mangium and Eucalyptus at 4 sites in Brazil

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DOI	10.1016/j.foreco.2018.12.055
	Nitrogen cycling in monospecific and mixed-species plantations of Acacia mangium and Eucalyptus at 4 sites in Brazil
	Voigtlaender M.; Brandani C.B.; Caldeira D.R.M.; Tardy F.; Bouillet J.-P.; Gonçalves J.L.M.; Moreira M.Z.; Leite F.P.; Brunet D.; Paula R.R.; Laclau J.-P.
发表日期	2019
ISSN	0378-1127
起始页码	56
结束页码	67
卷号	436
英文摘要	Mixing N-fixing trees with eucalypts is an attractive option to improve the long-term soil N status in fast-growing plantations established in tropical soils. A randomized block design was replicated at four sites in Brazil to compare the biogeochemical cycles in mono-specific stands of Eucalyptus (100E) and Acacia mangium (100A) with mixed-species plantations in a proportion of 1:1 (50A50E). Our study aimed to assess the effects of introducing A. mangium trees in Eucalyptus plantations on atmospheric N 2 fixation, N cycling and soil organic matter stocks. Litterfall and soil N mineralization were measured over the last two years of the rotation (4–6 years after planting). Aboveground N accumulation in the trees and C and N stocks in the forest floor and in the top soil were intensively sampled at harvesting age. N 2 fixation rates were estimated using the natural abundance of 15 N as well as by the difference between total N stocks in 100A and 50A50E relative to 100E (accretion method). While the 15 N natural abundance method was unsuitable, the accretion method showed consistently across the four sites that atmospheric N fixation reached about 250 and 400 kg N ha −1 rotation −1 in 50A50E and 100A, respectively. Except at one site with high mortality, N contents within trees at harvesting were approximately 40% higher in 100A than in 100E. Mean N contents in litterfall and N mineralization rates were about 60% higher in 100A than in 100E, with intermediate values in 50A50E. The amounts of N in litterfall were much more dependent on soil N mineralization rates for acacia trees than for eucalypt trees. Soil C and N stocks were dependent on soil texture but not influenced by tree species. N budgets over a 6-year rotation were enhanced by about 65 kg N ha −1 yr −1 in 100A and 40 kg N ha −1 yr −1 in 50A50E relative to monospecific eucalypt plantations. Introducing N-fixing trees in eucalypt plantations might therefore contribute to reducing the need for mineral N fertilization in the long-term. © 2018 Elsevier B.V.
英文关键词	Eucalypt; Litterfall; N 2 fixation; Nutrition; Organic matter; Tree mixtures; Tropical plantations
语种	英语
scopus关键词	Biogeochemistry; Biological materials; Budget control; Mineralogy; Nitrogen; Nitrogen fertilizers; Nutrition; Organic compounds; Soils; Eucalypt; Eucalypt plantations; Eucalyptus plantations; Litterfalls; Mineral n fertilizations; N mineralization rate; N2 fixation; Tropical plantations; Forestry; biogeochemical cycle; dicotyledon; forest floor; legume; litterfall; nitrogen cycle; nitrogen fixation; nutrition; organic matter; plantation; soil nitrogen; soil organic matter; soil texture; tropical environment; Cost Control; Forestry; Loam; Nitrogen; Nutrition; Organic Compounds; Plantations; Trees; Brazil; Acacia; Acacia mangium; Eucalyptus
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/156172
作者单位	USP, ESALQ, Forest Science Department, Piracicaba, 13418-900, Brazil; UNESP, Departamento de Solos e Recursos Ambientais, Universidade Estadual Paulista ‘Júlio de Mesquita Filho’, Botucatu, SP 18610-300, Brazil; CIRAD, UMR Eco&Sols, Montpellier, F-34398, France; Eco&Sols, INRA, CIRAD, IRD, Montpellier SupAgro, University of Montpellier, Montpellier, France; USP, CENA, Av. Centenário, 303, Piracicaba, 13416-903, Brazil; CENIBRA, Coordenação de Pesquisa Florestal, 35196-972 Belo OrienteMG, Brazil; Department of Forest Science and Wood, UFES, 29550-000 Jerônimo Monteiro, Brazil
推荐引用方式 GB/T 7714	Voigtlaender M.,Brandani C.B.,Caldeira D.R.M.,et al. Nitrogen cycling in monospecific and mixed-species plantations of Acacia mangium and Eucalyptus at 4 sites in Brazil[J],2019,436.
APA	Voigtlaender M..,Brandani C.B..,Caldeira D.R.M..,Tardy F..,Bouillet J.-P..,...&Laclau J.-P..(2019).Nitrogen cycling in monospecific and mixed-species plantations of Acacia mangium and Eucalyptus at 4 sites in Brazil.Forest Ecology and Management,436.
MLA	Voigtlaender M.,et al."Nitrogen cycling in monospecific and mixed-species plantations of Acacia mangium and Eucalyptus at 4 sites in Brazil".Forest Ecology and Management 436(2019).