Effects of a phosphinothricin based herbicide on selected groups of soil microorganisms

Pampulha, M. E.; Ferreira, M.A.S.S.; Oliveira, A.

doi:10.1002/jobm.200610274

Cited by 32 publications

(20 citation statements)

References 22 publications

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“…Only the highest concentration of metribuzin applied to the sandy soil had a stimulating effect. Similar responses were observed by Sebiomo et al (2011) in a study with atrazine, and by Pampulha et al (2007) in experiments with glufosinate-ammonium. However, Šantrić et al (2018) observed an elevated activity of dehydrogenase in a study with nicosulfuron and glyphosate in loamy and sandy soils.…”

Section: Discussionsupporting

confidence: 88%

Microbial activity in different soils in response to metribuzin treatment

et al. 2019

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The effect of metribuzin on soil microorganisms and their enzymatic activity, as well as the amount of metribuzin residues, greatly depend on the type of soil and its physico-chemical properties. A laboratory experiment was set up to determine the effects of metribuzin on different groups of microorganisms and dehydrogenase activity in loamy and sandy soils. The amounts of metribuzin residues in those soils were also determined. The following concentrations were tested: 12.0, 24.0, 120.0 and 1200.0 mg a.i. kg-1 soil. Samples were collected 3, 7, 14, 30 and 45 days after metribuzin application. Metribuzin acted inhibitively on total bacteria counts in both types of soil: 6.9% in loamy and 7.9% in sandy soils. Actinomycetes counts decreased over the first 14 days after metribuzin treatment by 15.6% in loamy and 8.1% in sandy soil. However, starting with the 30 th post-treatment day, their number either increased or remained at the control level. Fungi counts increased by 6.0% seven days after the application of the two highest concentrations. In sandy soil, fungi counts were significantly reduced by 29%. Metribuzin treatment significantly reduced the activity of dehydrogenase enzyme in both types of soil. Only the highest test concentration applied to the sandy soil showed a stimulating effect (33.2 %). Degradation data showed that the measured amounts of metribuzin decreased over time in both types of soil at all four test concentrations. The results showed that the extracted amounts of metribuzin active ingredient at all its test concentrations were greater in the sandy type of soil. Loamy soil was shown to have a better sorption capacity due to its higher contents of organic matter and clay.

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Section: Discussionsupporting

confidence: 88%

Microbial activity in different soils in response to metribuzin treatment

et al. 2019

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“…The more organic matter present in a soil, the longer an insecticide persists in it. According to several researchers [16,34,47,48,49,50], pesticides can cause qualitative and quantitative change in soil microbial populations.…”

Section: Effect Of Pesticides On Invertase On Different Days After mentioning

confidence: 99%

Impact of Pesticides on Microbial Diversity and Enzymes in Soil

Ataikiru

Okpokwasili

Okerentugba

2019

SAJRM

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Introduction: The presence of pesticides in soils could result in alterations in microbial activities (enzyme activities, microbial populations), soil physical and chemical properties. Research gap/Challenges: Insufficient literatures on extensive monitoring of soil quality through enzyme activity, during pesticides application. Existing literatures concerning analysis of effect of pesticide application on soil enzyme activity are not comprehensive with respect to number of soil enzymes analysed. Aim/Objective: The study was conducted to investigate the effect of carbofuran and paraquat on soil biochemical characteristics on certain soils in the Niger Delta region of Nigeria. Methodology: These pesticides were applied at recommended doses, their effects on soil organic carbon, enzymes activity and microbial populations were assessed using standard methods. The enzymes monitored were amylase, invertase, protease, urease, phosphatase and dehydrogenase. Microbial counts were carried out for total heterotrophic bacteria, fungi, actinomycetes, nitrifying bacteria and phosphate solubilizers using the spread plate method. Results: There were variations in the different enzyme activities in carbofuran – and paraquat - treated soil during this research. Dehydrogenase activity increased in treated soils. Also, urease activity was lower compared to other enzyme activities. As the study progressed, variations in values of soil organic carbon were observed. There was a gradual increase in microbial counts and can be traceable to their ability to temporarily mineralize and use the pesticides as carbon and energy source. The soil organic carbon, enzymes and microbial counts values were significantly different at P=0.05. Conclusion: This research revealed that the pesticides cause temporal impact on microbial populations and enzyme activities, associated with the pesticide type at recommended field application rates. A change in numbers, activity and diversity of soil microorganisms may act as indicators of soil fertility and reflect the soil quality.

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“…Being at the bottom of the food chain, changes in microbial communities are often a precursor to the changes in the health and viability of the environment as a whole [2]. Our conceptual and predictive understanding of soil ecosystem processes, functions and management can be enhanced only upon obtaining the knowledge about the microbial community structure and composition in a given region.…”

Section: Introductionmentioning

confidence: 99%

Bacterial and Archaea Community Present in the Pine Barrens Forest of Long Island, NY: Unusually High Percentage of Ammonia Oxidizing Bacteria

Shah

Kambhampati

et al. 2011

PLoS ONE

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Of the few preserved areas in the northeast of United States, the soil in the Pine Barrens Forests presents a harsh environment for the microorganisms to grow and survive. In the current study we report the use of clustering methods to scientifically select the sampling locations that would represent the entire forest and also report the microbial diversity present in various horizons of the soil. Sixty six sampling locations were selected across the forest and soils were collected from three horizons (sampling depths). The three horizons were 0–10 cm (Horizon O); 11–25 cm (Horizon A) and 26–40 cm (Horizon B). Based on the total microbial substrate utilization pattern and K-means clustering analysis, the soil in the Pine Barrens Forest can be classified into four distinct clusters at each of the three horizons. One soil sample from each of the four clusters were selected and archaeal and bacterial populations within the soil studied using pyrosequencing method. The results show the microbial communities present in each of these clusters are different. Within the microbial communities present, microorganisms involved in nitrogen cycle occupy a major fraction of microbial community in the soil. High level of diversity was observed for nitrogen fixing bacteria. In contrast, Nitrosovibrio and Nitrosocaldus spp are the single bacterial and archaeal population respectively carrying out ammonia oxidation in the soil.

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Effects of a phosphinothricin based herbicide on selected groups of soil microorganisms

Cited by 32 publications

References 22 publications

Microbial activity in different soils in response to metribuzin treatment

Microbial activity in different soils in response to metribuzin treatment

Impact of Pesticides on Microbial Diversity and Enzymes in Soil

Bacterial and Archaea Community Present in the Pine Barrens Forest of Long Island, NY: Unusually High Percentage of Ammonia Oxidizing Bacteria

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