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Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition

Soil microorganisms play a crucial role in organic matter decomposition and nutrient cycling in cropping systems. Compared to bacteria, fungal community composition and the role of fungi in organic matter decomposition and nutrient cycling in agro-systems are, however, elusive. Silicon (Si) fertiliz...

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Autores principales: Das, Suvendu, Lee, Jeong Gu, Cho, Song Rae, Song, Hyeon Ji, Kim, Pil Joo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6932956/
https://www.ncbi.nlm.nih.gov/pubmed/31921092
http://dx.doi.org/10.3389/fmicb.2019.02950
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author Das, Suvendu
Lee, Jeong Gu
Cho, Song Rae
Song, Hyeon Ji
Kim, Pil Joo
author_facet Das, Suvendu
Lee, Jeong Gu
Cho, Song Rae
Song, Hyeon Ji
Kim, Pil Joo
author_sort Das, Suvendu
collection PubMed
description Soil microorganisms play a crucial role in organic matter decomposition and nutrient cycling in cropping systems. Compared to bacteria, fungal community composition and the role of fungi in organic matter decomposition and nutrient cycling in agro-systems are, however, elusive. Silicon (Si) fertilization is essential to improve agronomic performance of rice. The effects of the Si fertilizer application on the soil fungal community composition and their contribution in soil organic matter (SOM) decomposition are not yet studied. We investigated the short-term (120 days) slag silicate fertilizer (SSF) amendment impacts on plant photosynthesis and soil biochemical changes, soil fungal communities (assessed by ITS amplicon illumina sequencing), hydrolytic and oxidase enzyme activities, CO(2) emissions, and bacterial and fungal respiration in diverse eco-geographic races of rice (Oryza sativa L.), i.e., Japonica rice (O. sativa japonica) and Indica rice (O. sativa indica). The short-term SSF amendment significantly increased the relative abundance of saprotrophic fungi and accelerated organic matter decomposition. The increase in saprotrophic fungi was mostly attributed to greater labile C availability and Si availability. Higher organic matter decomposition was accompanied by an increase in both hydrolytic and oxidative enzyme activities in response to the SSF amendment. The stimulation of oxidative enzyme activities was explained by an increase in root oxidase activities and iron redox cycling, whereas stimulation of hydrolytic enzyme activities was explained by the greater labile C availability under SSF fertilization. We conclude that the short-term SSF amendment increases saprotrophic fungal communities and soil hydrolytic and oxidative enzyme activities, which in turn stimulates SOM mineralization and thus could have negative feedback impacts on soil C storage in submerged rice paddies.
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spelling pubmed-69329562020-01-09 Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition Das, Suvendu Lee, Jeong Gu Cho, Song Rae Song, Hyeon Ji Kim, Pil Joo Front Microbiol Microbiology Soil microorganisms play a crucial role in organic matter decomposition and nutrient cycling in cropping systems. Compared to bacteria, fungal community composition and the role of fungi in organic matter decomposition and nutrient cycling in agro-systems are, however, elusive. Silicon (Si) fertilization is essential to improve agronomic performance of rice. The effects of the Si fertilizer application on the soil fungal community composition and their contribution in soil organic matter (SOM) decomposition are not yet studied. We investigated the short-term (120 days) slag silicate fertilizer (SSF) amendment impacts on plant photosynthesis and soil biochemical changes, soil fungal communities (assessed by ITS amplicon illumina sequencing), hydrolytic and oxidase enzyme activities, CO(2) emissions, and bacterial and fungal respiration in diverse eco-geographic races of rice (Oryza sativa L.), i.e., Japonica rice (O. sativa japonica) and Indica rice (O. sativa indica). The short-term SSF amendment significantly increased the relative abundance of saprotrophic fungi and accelerated organic matter decomposition. The increase in saprotrophic fungi was mostly attributed to greater labile C availability and Si availability. Higher organic matter decomposition was accompanied by an increase in both hydrolytic and oxidative enzyme activities in response to the SSF amendment. The stimulation of oxidative enzyme activities was explained by an increase in root oxidase activities and iron redox cycling, whereas stimulation of hydrolytic enzyme activities was explained by the greater labile C availability under SSF fertilization. We conclude that the short-term SSF amendment increases saprotrophic fungal communities and soil hydrolytic and oxidative enzyme activities, which in turn stimulates SOM mineralization and thus could have negative feedback impacts on soil C storage in submerged rice paddies. Frontiers Media S.A. 2019-12-20 /pmc/articles/PMC6932956/ /pubmed/31921092 http://dx.doi.org/10.3389/fmicb.2019.02950 Text en Copyright © 2019 Das, Lee, Cho, Song and Kim. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Das, Suvendu
Lee, Jeong Gu
Cho, Song Rae
Song, Hyeon Ji
Kim, Pil Joo
Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title_full Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title_fullStr Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title_full_unstemmed Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title_short Silicate Fertilizer Amendment Alters Fungal Communities and Accelerates Soil Organic Matter Decomposition
title_sort silicate fertilizer amendment alters fungal communities and accelerates soil organic matter decomposition
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6932956/
https://www.ncbi.nlm.nih.gov/pubmed/31921092
http://dx.doi.org/10.3389/fmicb.2019.02950
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