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Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment

Herbicides are commonly used in Malaysia to control weeds in oil palm plantation. In addition to their impact on weeds, these herbicides are also affecting soil microorganisms which are responsible for numerous biological processes essential for crop production. In the present study, we assessed the...

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Main Authors: Mohd Zain, Nur Masirah, Mohamad, Rosli, Sijam, Kamaruzaman, Morshed, Md. Mahbub, Awang, Yahya
Format: Article
Language:English
Published: Academic Journals 2013
Online Access:http://psasir.upm.edu.my/id/eprint/29401/1/29401.pdf
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spelling oai:psasir.upm.edu.my:29401 http://psasir.upm.edu.my/id/eprint/29401/ Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment Mohd Zain, Nur Masirah Mohamad, Rosli Sijam, Kamaruzaman Morshed, Md. Mahbub Awang, Yahya Herbicides are commonly used in Malaysia to control weeds in oil palm plantation. In addition to their impact on weeds, these herbicides are also affecting soil microorganisms which are responsible for numerous biological processes essential for crop production. In the present study, we assessed the impact of four commonly used herbicides (paraquat, glyphosate, glufosinate-ammonium and metsulfuron-methyl) on soil microbial populations in oil palm plantation. Our study showed that the herbicide treatments significantly inhibited the development of microbial populations in the soil, and the degree of inhibition closely related to the rates of their applications and varied with the types of herbicide. Paraquat caused the highest inhibitory effect to bacteria and actinomycetes, whereas fungi were most affected by glyphosate. Metsulfuron-methyl had least inhibitory effects to all the microbial populations. The highest inhibition (59.3%) for fungal population was observed at 6 DAT (days after treatment), whereas for the bacteria and actinomycetes (82.0 and 70.6%, respectively) were at 4 DAT. Increasing trend of inhibition on growth of microbial populations was observed from the initial effect until 6 DAT, followed by a drastic decrease of the inhibition at 10 DAT. No inhibition was observed at 20 DAT. The study suggests that the herbicide application to soil of oil palm plantation cause transient impacts on microbial population growth, when applied at recommended or even as high as double (2x) of the recommended field application rate. Academic Journals 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/29401/1/29401.pdf Mohd Zain, Nur Masirah and Mohamad, Rosli and Sijam, Kamaruzaman and Morshed, Md. Mahbub and Awang, Yahya (2013) Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment. African Journal of Microbiology Research, 7 (5). art. no. 36CD73418123. pp. 367-374. ISSN 1996-0808 http://www.academicjournals.org/journal/AJMR/article-abstract/36CD73418123 10.5897/AJMR12.1277
institution UPM IR
collection UPM IR
language English
description Herbicides are commonly used in Malaysia to control weeds in oil palm plantation. In addition to their impact on weeds, these herbicides are also affecting soil microorganisms which are responsible for numerous biological processes essential for crop production. In the present study, we assessed the impact of four commonly used herbicides (paraquat, glyphosate, glufosinate-ammonium and metsulfuron-methyl) on soil microbial populations in oil palm plantation. Our study showed that the herbicide treatments significantly inhibited the development of microbial populations in the soil, and the degree of inhibition closely related to the rates of their applications and varied with the types of herbicide. Paraquat caused the highest inhibitory effect to bacteria and actinomycetes, whereas fungi were most affected by glyphosate. Metsulfuron-methyl had least inhibitory effects to all the microbial populations. The highest inhibition (59.3%) for fungal population was observed at 6 DAT (days after treatment), whereas for the bacteria and actinomycetes (82.0 and 70.6%, respectively) were at 4 DAT. Increasing trend of inhibition on growth of microbial populations was observed from the initial effect until 6 DAT, followed by a drastic decrease of the inhibition at 10 DAT. No inhibition was observed at 20 DAT. The study suggests that the herbicide application to soil of oil palm plantation cause transient impacts on microbial population growth, when applied at recommended or even as high as double (2x) of the recommended field application rate.
format Article
author Mohd Zain, Nur Masirah
Mohamad, Rosli
Sijam, Kamaruzaman
Morshed, Md. Mahbub
Awang, Yahya
spellingShingle Mohd Zain, Nur Masirah
Mohamad, Rosli
Sijam, Kamaruzaman
Morshed, Md. Mahbub
Awang, Yahya
Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
author_facet Mohd Zain, Nur Masirah
Mohamad, Rosli
Sijam, Kamaruzaman
Morshed, Md. Mahbub
Awang, Yahya
author_sort Mohd Zain, Nur Masirah
title Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
title_short Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
title_full Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
title_fullStr Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
title_full_unstemmed Effects of selected herbicides on soil microbial populations in oil palm plantation of Malaysia: a microcosm experiment
title_sort effects of selected herbicides on soil microbial populations in oil palm plantation of malaysia: a microcosm experiment
publisher Academic Journals
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/29401/1/29401.pdf
_version_ 1782720462245068800
score 12.935284

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