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Long-term P fertilisation of pasture soil did not increase soil organic matter stocks but increased microbial biomass and activity

TitleLong-term P fertilisation of pasture soil did not increase soil organic matter stocks but increased microbial biomass and activity
Publication TypeJournal Article
Year of Publication2017
AuthorsWakelin S.A, Condron L.M, Gerard E., Dignam B.EA, Black A., O'Callaghan M.
JournalBiology and Fertility of Soils
Volume53
Pagination511-521
Date PublishedJul
Type of ArticleArticle
ISBN Number0178-2762
Accession NumberWOS:000403352800005
Keywords16S RIBOSOMAL-RNA, activity, Agriculture, Bacteria, carbon, Community structure, Copiotroph, diversity, ecosystem, gradient gel-electrophoresis, grazed pasture, MICROBIAL, microbial biomass, MicroResp, nutrient stoichiometry, Oligotroph, Organic matter, phosphorus
Abstract

The soil organic matter (OM) content of soils in a long-term fertiliser field trial (Winchmore, New Zealand) are similar (P > 0.05) despite > 60 years application of different phosphorus (P) rates. As the net primary productivity increased with P addition, greater losses of carbon (C) occur concomitantly with increased P fertility. Several hypotheses have been proposed to explain the mechanisms, including C leaching, increased earthworm activity or elevated rates of microbial activity. In this study, we found support for both direct and secondary effects of soil P on soil C through impacts on the soil microbial community. Microbial biomass, inferred through quantification of hot water extractable C, increased with soil P status and decreased with C/P ratio (P

Short TitleBiol. Fertil. SoilsBiol. Fertil. Soils
Alternate JournalBiol. Fertil. Soils 
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Cited Reference Count: 53
Wakelin, S. A. Condron, L. M. Gerard, E. Dignam, B. E. A. Black, A. O'Callaghan, M.

7
Springer
New york
1432-0789
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    [biblio_auth_address] => [Wakelin, S. A.] Scion, POB 29237, Christchurch 8540, New Zealand. [Wakelin, S. A.; Gerard, E.; Dignam, B. E. A.; O'Callaghan, M.] AgResearch Ltd, Lincoln Sci Ctr, Private Bag 4749, Christchurch 8140, New Zealand. [Wakelin, S. A.; Condron, L. M.; Dignam, B. E. A.; Black, A.; O'Callaghan, M.] Lincoln Univ, BioProtect Res Ctr, POB 84085, Lincoln 7646, New Zealand. [Condron, L. M.; Dignam, B. E. A.; Black, A.] Lincoln Univ, Fac Agr & Life Sci, POB 85084, Lincoln 7647, New Zealand.
Wakelin, SA (reprint author), Scion, POB 29237, Christchurch 8540, New Zealand.; Wakelin, SA (reprint author), AgResearch Ltd, Lincoln Sci Ctr, Private Bag 4749, Christchurch 8140, New Zealand.; Wakelin, SA (reprint author), Lincoln Univ, BioProtect Res Ctr, POB 84085, Lincoln 7646, New Zealand.
steve.a.wakelin@scionresearch.com
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