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Characterization of peat microbial functional diversity in aerobic rice rhizosphere

Microorganisms in the rhizosphere possess numerous metabolic activities. The addition of inorganic substance such as fertilizer could affect the microbial functional diversity. This study was conducted to evaluate the effect of different rate of NPK fertilizer on microbial functional diversity in th...

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Hauptverfasser: Ali Hassan, Nor Ayshah Alia, Mohd Saud, Halimi
Format: Artikel
Sprache:English
Veröffentlicht: Universiti Putra Malaysia Press 2020
Online Zugang:http://psasir.upm.edu.my/id/eprint/80506/1/RICE.pdf
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spelling oai:psasir.upm.edu.my:80506 http://psasir.upm.edu.my/id/eprint/80506/ Characterization of peat microbial functional diversity in aerobic rice rhizosphere Ali Hassan, Nor Ayshah Alia Mohd Saud, Halimi Microorganisms in the rhizosphere possess numerous metabolic activities. The addition of inorganic substance such as fertilizer could affect the microbial functional diversity. This study was conducted to evaluate the effect of different rate of NPK fertilizer on microbial functional diversity in the rhizosphere of local aerobic rice variety. Aerobic rice variety MRIA 1 was used in this study. Peat was taken from a non-agricultural area in Klang, Malaysia. The effect of fertilizer rate was determined with 4 different rates (C = nonfertilized; T1 = 100 kg/ha NPK; T2 = 200 kg/ha NPK; T3 = 400 kg/ha NPK). Microbial functional diversity was performed using Biolog™ Ecoplate System and measured by microbial activities, such as average well color development (AWCD), species richness (R), Shannon-Weaver index (H index) and species evenness (E). As a result, microbial activity increased to 5.7% when fertilizer applied at T2, while fertilizer rate at T3 increased species richness by 3.2%. However, addition of fertilizer did not affect the H index while species evenness slightly decreased by 1.1% when applied at T3. Bacteria population was reduced when fertilizer added at T1. Fertilizer addition to the peat soil decreased the culturable population of nitrogenfixing microbes while no effect was found on culturable fungal, actinomycetes and phosphate-solubilizing microbe population. Microbes in T2 utilized many carbon sources. Variation in carbon sources used by microbes was found when fertilizer was applied at different rates. D-cellobiose, pyruvic acid methyl ester, and L-serine were the carbon sources that influenced the microbial function in soil. It is concluded that fertilizer has an effect on microbial functional diversity in the peat rhizosphere of local aerobic variety. The recommended fertilizer rate (T2) increased the microbial activity while high fertilizer rate (T3) increased species richness and decreased species evenness. Universiti Putra Malaysia Press 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/80506/1/RICE.pdf Ali Hassan, Nor Ayshah Alia and Mohd Saud, Halimi (2020) Characterization of peat microbial functional diversity in aerobic rice rhizosphere. Pertanika Journal of Tropical Agricultural Science, 43 (4). pp. 677-692. ISSN 1511-3701; ESSN: 2231-8542 http://www.pertanika.upm.edu.my/pjtas/browse/regular-issue?article=JTAS-2014-2020 10.47836/pjtas.43.4.18
institution UPM IR
collection UPM IR
language English
description Microorganisms in the rhizosphere possess numerous metabolic activities. The addition of inorganic substance such as fertilizer could affect the microbial functional diversity. This study was conducted to evaluate the effect of different rate of NPK fertilizer on microbial functional diversity in the rhizosphere of local aerobic rice variety. Aerobic rice variety MRIA 1 was used in this study. Peat was taken from a non-agricultural area in Klang, Malaysia. The effect of fertilizer rate was determined with 4 different rates (C = nonfertilized; T1 = 100 kg/ha NPK; T2 = 200 kg/ha NPK; T3 = 400 kg/ha NPK). Microbial functional diversity was performed using Biolog™ Ecoplate System and measured by microbial activities, such as average well color development (AWCD), species richness (R), Shannon-Weaver index (H index) and species evenness (E). As a result, microbial activity increased to 5.7% when fertilizer applied at T2, while fertilizer rate at T3 increased species richness by 3.2%. However, addition of fertilizer did not affect the H index while species evenness slightly decreased by 1.1% when applied at T3. Bacteria population was reduced when fertilizer added at T1. Fertilizer addition to the peat soil decreased the culturable population of nitrogenfixing microbes while no effect was found on culturable fungal, actinomycetes and phosphate-solubilizing microbe population. Microbes in T2 utilized many carbon sources. Variation in carbon sources used by microbes was found when fertilizer was applied at different rates. D-cellobiose, pyruvic acid methyl ester, and L-serine were the carbon sources that influenced the microbial function in soil. It is concluded that fertilizer has an effect on microbial functional diversity in the peat rhizosphere of local aerobic variety. The recommended fertilizer rate (T2) increased the microbial activity while high fertilizer rate (T3) increased species richness and decreased species evenness.
format Article
author Ali Hassan, Nor Ayshah Alia
Mohd Saud, Halimi
spellingShingle Ali Hassan, Nor Ayshah Alia
Mohd Saud, Halimi
Characterization of peat microbial functional diversity in aerobic rice rhizosphere
author_facet Ali Hassan, Nor Ayshah Alia
Mohd Saud, Halimi
author_sort Ali Hassan, Nor Ayshah Alia
title Characterization of peat microbial functional diversity in aerobic rice rhizosphere
title_short Characterization of peat microbial functional diversity in aerobic rice rhizosphere
title_full Characterization of peat microbial functional diversity in aerobic rice rhizosphere
title_fullStr Characterization of peat microbial functional diversity in aerobic rice rhizosphere
title_full_unstemmed Characterization of peat microbial functional diversity in aerobic rice rhizosphere
title_sort characterization of peat microbial functional diversity in aerobic rice rhizosphere
publisher Universiti Putra Malaysia Press
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/80506/1/RICE.pdf
_version_ 1819299674331283456
score 13.4562235

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