globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2017.07.041
Scopus记录号: 2-s2.0-85027576495
论文题名:
Biomass production, nitrogen accumulation and symbiotic nitrogen fixation in a mixed-species plantation of eucalypt and acacia on a nutrient-poor tropical soil
作者: Tchichelle S.V.; Mareschal L.; Koutika L.-S.; Epron D.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2017
卷: 403
起始页码: 103
结束页码: 111
语种: 英语
英文关键词: 15N isotope dilution ; Biological nitrogen fixation ; Competition ; Facilitation ; Ferralic arenosols
Scopus关键词: Competition ; Ecology ; Forestry ; Mixtures ; Nitrogen ; Soil moisture ; Biological nitrogen fixations ; Competitive reduction ; Facilitation ; Ferralic arenosols ; Inter-specific competitions ; Isotope dilutions ; Nitrogen accumulation ; Symbiotic nitrogen fixation ; Nitrogen fixation ; Acacia ; Acacia mangium ; Eucalyptus urophylla
英文摘要: The success of mixed-species tree plantations depends on the balance between positive and negative interactions. Mixtures of Acacia mangium and Eucalyptus urophylla × grandis out-yield their respective monocultures in term of wood production on the Congolese coastal plain, suggesting that facilitation and/or competitive reduction surpass interspecific competition. We investigated how these interactions affected biomass production and N accumulation during the early growth stage of a second rotation of a mixed-species stand of these two species. We used the 15N dilution method to estimate symbiotic nitrogen fixation and its contribution to N accumulation in acacia monoculture and mixture, and we assessed how much N derived from the atmosphere is transferred to the eucalypt trees in the mixed-species stand. Eucalypts grew taller and acacias grew larger in the mixture compared to the monocultures. N mineralomass was greater in the mixture relative to the average values in the two monocultures, with both species contributing to this enhanced N mineralomass. The amount of N derived from the atmosphere in the mixture was 60% higher than that expected given the amount found in acacia monoculture, and 16% of the nitrogen accumulated in eucalypt trees and aboveground eucalypt litterfall was derived from the atmosphere. Reduced competition for light and soil water also contributed to the increased growth of acacias in the mixture, showing that both species benefit from growing in a mixed stand. © 2017 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/64135
Appears in Collections:影响、适应和脆弱性

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作者单位: Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, BP 1291, Pointe-Noire, Congo; Université de Lorraine, INRA, UMR 1137, Ecologie et Ecophysiologie Forestières, Faculté des Sciences et Technologies, Vandœuvre-lès-Nancy, France; CIRAD, UMR 111, Ecologie Fonctionnelle & Biogéochimie des Sols & Agroécosystèmes, Montpellier, France

Recommended Citation:
Tchichelle S.V.,Mareschal L.,Koutika L.-S.,et al. Biomass production, nitrogen accumulation and symbiotic nitrogen fixation in a mixed-species plantation of eucalypt and acacia on a nutrient-poor tropical soil[J]. Forest Ecology and Management,2017-01-01,403
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