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C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere

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dc.contributor.author Wei X.
dc.contributor.author Razavi B.
dc.contributor.author Hu Y.
dc.contributor.author Xu X.
dc.contributor.author Zhu Z.
dc.contributor.author Liu Y.
dc.contributor.author Kuzyakov Y.
dc.contributor.author Li Y.
dc.contributor.author Wu J.
dc.contributor.author Ge T.
dc.date.accessioned 2020-01-15T21:17:13Z
dc.date.available 2020-01-15T21:17:13Z
dc.date.issued 2019
dc.identifier.issn 0178-2762
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/155529
dc.description.abstract © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. As the primary microbial substrate after shoot cutting, the element stoichiometry of root-detritus (dying or dead roots) influences the enzyme activity in root-detritusphere. However, the effect of the C/P ratio of root-detritus on the dynamics and distribution of enzyme activities is little revealed. We hypothesised that P fertilisation would decrease the C/P ratio of root-detritus, therefore affecting the hotspot areas and hot moments of C-acquiring and P-acquiring enzyme activities, as well as their activity ratio (C/P acquisition ratio). Root-detritus of low (59.0) and high (170.8) C/P ratios was produced in P-poor soil with and without P fertilisation, respectively. In situ soil zymography showed that the distribution of C-acquiring enzymes (β-glucosidase and cellobiohydrolase) was more associated with root-detritus than P-acquiring enzymes (acid and alkaline phosphomonoesterase). P fertilisation increased the hotspot areas of C-acquiring enzyme activities over the experiment, without influencing their temporal dynamics. However, its effect on phosphomonoesterase activities depended on the decomposition and delayed the appearance of the highest hotspot areas. P supply met the microbial demand in P-fertilised soil, with high C/P acquisition ratio and constant stoichiometry of microbial biomass C (MBC)/microbial biomass P (MBP). A low C/P acquisition ratio and high MBC/MBP in non-fertilised soil was observed, indicating P limitation for microorganisms. After the 150-day incubation, Olsen P significantly increased in P-fertilised soil (P < 0.05), whereas it decreased in the root-detritusphere of non-fertilised soil. We conclude that the decomposition of root-detritus with a low C/P ratio has potential to improve soil P availability; however, C-P imbalance may increase during the decomposition of root-detritus with a high C/P ratio.
dc.relation.ispartofseries Biology and Fertility of Soils
dc.subject C/P acquisition ratio
dc.subject Hot moments
dc.subject Hotspot areas
dc.subject P fertilisation
dc.subject Root-detritus C/P ratio
dc.subject Root-detritusphere
dc.subject Soil zymography
dc.title C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere
dc.type Article
dc.relation.ispartofseries-issue 3
dc.relation.ispartofseries-volume 55
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 251
dc.source.id SCOPUS01782762-2019-55-3-SID85060720664

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  • Публикации сотрудников КФУ Scopus [22633]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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