DOI: 10.1016/j.foreco.2015.12.028
Scopus记录号: 2-s2.0-84951816891
论文题名: Dynamics of aboveground biomass accumulation in monospecific and mixed-species plantations of Eucalyptus and Acacia on a Brazilian sandy soil
作者: Santos F.M. ; Balieiro F.C. ; Ataíde D.H.S. ; Diniz A.R. ; Chaer G.M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 363 起始页码: 86
结束页码: 97
语种: 英语
英文关键词: Aboveground net primary production (ANPP)
; Allometric relationships
; Biological nitrogen fixation (BNF)
; Ecological interactions
; Stemwood production
; Stress-gradient hypothesis (SGH)
Scopus关键词: Biomass
; Design of experiments
; Ecology
; Nitrogen
; Nitrogen fixation
; Productivity
; Allometric relationship
; Biological nitrogen fixations
; Ecological interactions
; Net primary production
; Stemwoods
; Stress gradient
; Forestry
; Acacia
; Acacia mangium
; Eucalyptus
; Eucalyptus grandis
; Eucalyptus urograndis
; Eucalyptus urophylla
英文摘要: In this study, we hypothesized that a positive impact of Acacia trees when grown in mixed stands with Eucalyptus trees in N-deficient soil, leads to a higher biomass production in mixed stands relative to the monocultures. A randomized block design experiment was set up in a Brazilian Planosol to assess the dynamics of aboveground accumulation of monospecific Eucalyptus urograndis (Eucalyptus urophylla S. T. Blake × Eucalyptus grandis W. Hill ex Maiden), with or without nitrogen fertilization (E100 + N and E100, respectively), and Acacia mangium (A100) stands, and two arrangements of both species in mixed plantations (E50A50 and E100A100). The height (H), diameter at breast height (DBH), litterfall, and aboveground biomass production were measured over a full rotation. Our results partially confirm the initial hypothesis. Acacia showed limited competitive ability against Eucalyptus, which resulted in a stratified canopy in the mixed stands, with Eucalyptus dominating the top layer, especially in the E100A100 arrangement. The E100A100 stand showed greater overall productivity compared with the E100 stand and similar productivity relative to the E100 + N stand. The E50A50 arrangement produced taller Eucalyptus trees with a larger diameter than the monoculture, although the smaller population of Eucalyptus trees in this mixed stand resulted in an overall biomass production that was equal to or less than that of the monocultures E100 and E100 + N, respectively. However, the DBH growth rate of Eucalyptus trees in E50A50 showed no signs of stagnation up to 60. months, which is different from the other treatments. Consequently, the harvesting age of such stands can be extended, which allows for the production of Eucalyptus logs with greater value for the lumber market. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65068
Appears in Collections: 影响、适应和脆弱性
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作者单位: Departamento de Silvicultura, Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Rodovia BR 465 - km 7, Seropédica, RJ, Brazil; Embrapa Solos, Rua Jardim Botânico, 1024, Jardim Botânico, Rio de Janeiro, RJ, Brazil; Embrapa Agrobiologia, Rodovia BR 465 - km 7, Seropédica, RJ, Brazil
Recommended Citation:
Santos F.M.,Balieiro F.C.,Ataíde D.H.S.,et al. Dynamics of aboveground biomass accumulation in monospecific and mixed-species plantations of Eucalyptus and Acacia on a Brazilian sandy soil[J]. Forest Ecology and Management,2016-01-01,363