AulenShipleyBradley2012

Référence

Aulen, M., Shipley, B. and Bradley, R.L. (2012) Prediction of in situ root decomposition rates in an interspecific context from chemical and morphological traits. Annals of Botany, 109(1):287-297. (Scopus )

Résumé

·Background and Aims: We quantitatively relate in situ root decomposition rates of a wide range of trees and herbs used in agroforestry to root chemical and morphological traits in order to better describe carbon fluxes from roots to the soil carbon pool across a diverse group of plant species.·Methods: In situ root decomposition rates were measured over an entire year by an intact core method on ten tree and seven herb species typical of agroforestry systems and were quantified using decay constants (k values) from Olsons single exponential model. Decay constants were related to root chemical (total carbon, nitrogen, soluble carbon, cellulose, hemicellulose, lignin) and morphological (specific root length, specific root length) traits. Traits were measured for both absorbing and non-absorbing roots.·Key Results: From 61 to 77% of the variation in the different root traits and 63 of that in root decomposition rates was interspecific. N was positively correlated, but total carbon and lignin were negatively correlated with k values. Initial root traits accounted for 75% of the variation in interspecific decomposition rates using partial least squares regressions; partial slopes attributed to each trait were consistent with functional ecology expectations.·Conclusions: Easily measured initial root traits can be used to predict rates of root decomposition in soils in an interspecific context. © The Author 2011.

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@ARTICLE { AulenShipleyBradley2012,
    AUTHOR = { Aulen, M. and Shipley, B. and Bradley, R.L. },
    TITLE = { Prediction of in situ root decomposition rates in an interspecific context from chemical and morphological traits },
    JOURNAL = { Annals of Botany },
    YEAR = { 2012 },
    VOLUME = { 109 },
    PAGES = { 287-297 },
    NUMBER = { 1 },
    ABSTRACT = { ·Background and Aims: We quantitatively relate in situ root decomposition rates of a wide range of trees and herbs used in agroforestry to root chemical and morphological traits in order to better describe carbon fluxes from roots to the soil carbon pool across a diverse group of plant species.·Methods: In situ root decomposition rates were measured over an entire year by an intact core method on ten tree and seven herb species typical of agroforestry systems and were quantified using decay constants (k values) from Olsons single exponential model. Decay constants were related to root chemical (total carbon, nitrogen, soluble carbon, cellulose, hemicellulose, lignin) and morphological (specific root length, specific root length) traits. Traits were measured for both absorbing and non-absorbing roots.·Key Results: From 61 to 77% of the variation in the different root traits and 63 of that in root decomposition rates was interspecific. N was positively correlated, but total carbon and lignin were negatively correlated with k values. Initial root traits accounted for 75% of the variation in interspecific decomposition rates using partial least squares regressions; partial slopes attributed to each trait were consistent with functional ecology expectations.·Conclusions: Easily measured initial root traits can be used to predict rates of root decomposition in soils in an interspecific context. © The Author 2011. },
    COMMENT = { Cited By (since 1996): 1 Export Date: 3 April 2012 Source: Scopus CODEN: ANBOA doi: 10.1093/aob/mcr259 },
    ISSN = { 03057364 (ISSN) },
    KEYWORDS = { Absorbing root, agroforestry, carbon credits, cellulose, decomposition rate, fibres, hemicellulose, lignin, root diameter, specific root length, agroforestry, carbon, carbon flux, cellulose, chemical analysis, decomposition, developmental biology, functional morphology, herb, interspecific variation, lignin, nitrogen, numerical model, prediction, quantitative analysis, root, shrub },
    OWNER = { Luc },
    TIMESTAMP = { 2012.04.03 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84555187177&partnerID=40&md5=97b70242332d492ffeae5efb68dfbefc },
}

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