BradleyGrenon2006

Référence

Bradley, R.L. and Grenon, F. (2006) Evidence that straw does not increase the mobilization of N from decomposing salal (Gaultheria shallon Pursh.) leaf litter. Soil Biology and Biochemistry, 38(1):191-194.

Résumé

We tested whether straw could induce higher N release from decomposing salal leaf litter, which ostensibly interferes with mineralization of N. We mixed forest floor material from two forest types with 15N-enriched salal leaf litter, and incubated the mixtures 3 years with and without straw amendments. The amounts of N, as well as the relative amounts of 15N, extracted in five fractions were, respectively, 29-93 and 25-82% lower in straw-amended forest floor. Results suggest that straw diverted microbial decomposition activity away from the more recalcitrant litter fractions. Previous reports of higher mineral-N availability in straw-amended forest floors are best explained by a fertilizer effect of straw as opposed to a 'priming effect'. © 2005 Elsevier Ltd. All rights reserved.

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@ARTICLE { BradleyGrenon2006,
    AUTHOR = { Bradley, R.L. and Grenon, F. },
    TITLE = { Evidence that straw does not increase the mobilization of N from decomposing salal (Gaultheria shallon Pursh.) leaf litter },
    JOURNAL = { Soil Biology and Biochemistry },
    YEAR = { 2006 },
    VOLUME = { 38 },
    PAGES = { 191-194 },
    NUMBER = { 1 },
    NOTE = { 00380717 (ISSN) Export Date: 26 April 2007 Source: Scopus CODEN: SBIOA doi: 10.1016/j.soilbio.2005.04.029 Language of Original Document: English Correspondence Address: Bradley, R.L.; De?partement de Biologie; Faculte des Sciences; Universite? de Sherbrooke; 2500, Boul. de l'Universite Sherbrooke, Que. J1K 2R1, Canada; email: robert.bradley@usherbrooke.ca References: Brookes, P.C., Landman, A., Pruden, G., Jenkinson, D.S., Chloroform fumigation and the release of soil nitrogen: A rapid direct extraction method to measure microbial biomass nitrogen in soil (1985) Soil Biology \& Biochemistry, 17, pp. 837-842; Chang, S.X., Preston, C.M., McCullough, K., Weetman, G.F., Barker, J., Effect of understory competition on distribution and recovery of N-15 applied to a Western Redcedar - Western Hemlock clear-cut site (1996) Canadian Journal of Forest Research, 26, pp. 313-321; Cheshire, M.V., Bedrock, C.N., Williams, B.L., Chapman, S.J., Solntseva, I., Thomsen, I., The immobilization of nitrogen by straw decomposing in soil (1999) European Journal of Soil Science, 50, pp. 329-341; (2003) Guide de Re?fe?rence en Fertilisation, 1e?re E?d., , Centre de re?fe?rences en agriculture et agroalimentaire du Que?bec, Ste-Foy, Que?bec; D'Elia, C., Steudler, P.A., Corwin, N., Determination of total nitrogen in aqueous samples using persulfate digestion (1977) Limnology and Oceanography, 22, pp. 760-764; Grenon, F., Bradley, R.L., Joanisse, G., Titus, B.D., Prescott, C.E., Mineral N availability for conifer growth following clearcutting: Responsive versus non-responsive ecosystems (2004) Forest Ecology and Management, 188, pp. 305-316; McTaggard, I.P., Smith, K.A., Estimation of potentially mineralisable nitrogen in soil by KCl extraction: II. Comparison with soil N uptake in the field (1993) Plant and Soil, 157, pp. 175-184; Meidinger, D., Pojar, J., (1991) Ecosystems of British Columbia, , BC Ministry of Forests. Special Report Series; Mulvaney, R.L., Nitrogen - Inorganic forms (1996) Methods of Soil Analysis, Part 3, Chemical Methods, pp. 1123-1184. , D.L. Sparks A.K.L. Page P.A. Helmke P.N. Soltanpour M.A. Tabatabai C.T. Johnston M.E. Summer Soil Science Society of America Madison, WI; Prescott, C.E., Zabek, L.M., Growth response and nutrient availability in Western Redcedar plantations following amendment with fish-wood compost and straw (1997) Canadian Journal of Forest Research, 27, pp. 598-602; Prescott, C.E., Weetman, G.F., Barker, J.E., Causes and amelioration of nutrient deficiencies in cutovers of cedar-hemlock forests in coastal British Columbia (1996) Forestry Chronicle, 72, pp. 293-302; Takahashi, S., Uenosono, S., Ono, S., Short- and long-term effects of rice straw application on nitrogen uptake by crops and nitrogen mineralization under flooded and upland conditions (2003) Plant and Soil, 251, pp. 291-301; Tilander, Y., Bonzi, M., Water and nutrient conservation through the use of agroforestry mulches, and sorghum yield response (1997) Plant and Soil, 197, pp. 219-232; Waring, S.A., Bremner, J.M., Ammonium production in soil under waterlogged conditions as an index of nitrogen availability (1964) Nature, 201, pp. 951-952. },
    ABSTRACT = { We tested whether straw could induce higher N release from decomposing salal leaf litter, which ostensibly interferes with mineralization of N. We mixed forest floor material from two forest types with 15N-enriched salal leaf litter, and incubated the mixtures 3 years with and without straw amendments. The amounts of N, as well as the relative amounts of 15N, extracted in five fractions were, respectively, 29-93 and 25-82% lower in straw-amended forest floor. Results suggest that straw diverted microbial decomposition activity away from the more recalcitrant litter fractions. Previous reports of higher mineral-N availability in straw-amended forest floors are best explained by a fertilizer effect of straw as opposed to a 'priming effect'. © 2005 Elsevier Ltd. All rights reserved. },
    KEYWORDS = { 15N-enriched litter Decomposition Extractable nitrogen Forest floor Long-term incubation Priming effect Salal Straw Decomposition Fertilizers Forestry Straw Long-term incubation Priming effect Salal Nitrogen decomposition leaf litter mobilization soil nitrogen Decay Forests Nitrogen Straw Gaultheria Gaultheria shallon },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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