Responses of soil microbial community structure and enzymatic activities to long-term application of mineral fertilizer and beef manure

Gautam, Asmita; Sekaran, Udayakumar; Guzman, Jose G.; Kovács, P.; Gonzalez-Hernandez, Jose L.; Kumar, Sandeep

doi:10.1016/j.indic.2020.100073

Cited by 34 publications

(30 citation statements)

References 59 publications

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“…Likewise, the non-significant differences in organic carbon and nitrogen contents after prolonged fertilization are not an unusual occurrence in grassland ecosystems, owing to the fact that only organic fertilizer application does have an influence on increasing the pool of soil organic materials and nutrient availability 43 . Similarly, this observation was reported by Gautam 44 where inorganic fertilizer could not play a vital role in the availability of labile fractions of C and N in the soil in comparison to where organic fertilizer (manure). Conversely, the slight increase in pH of P and liming-fertilized soil in comparison to other forms of fertilization could be attributed to the presence of CaCO 3 in the lime (dolomitic), since dolomitic lime is known as a derivative from the deposits of calcium carbonate and magnesium carbonate with much higher levels of magnesium 45 .…”

Section: Discussionsupporting

confidence: 81%

Soil microbes and associated extracellular enzymes largely impact nutrient bioavailability in acidic and nutrient poor grassland ecosystem soils

Ndabankulu

Egbewale

Tsvuura

et al. 2022

Sci Rep

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Understanding the role of soil microbes and their associated extracellular enzymes in long-term grassland experiments presents an opportunity for testing relevant ecological questions on grassland nutrient dynamics and functioning. Veld fertilizer trials initiated in 1951 in South Africa were used to assess soil functional microbial diversity and their metabolic activities in the nutrient-poor grassland soils. Phosphorus and liming trials used for this specific study comprised of superphosphate (336 kg ha−1) and dolomitic lime (2250 kg ha−1) (P + L), superphosphate (336 kg ha−1) (+ P) and control trials. These soils were analyzed for their nutrient concentrations, pH, total cations and exchange acidity, microflora and extracellular enzyme activities. The analysed soil characteristics showed significant differences except nitrogen (N) and organic carbon (C) concentrations showing no significant differences. P-solubilizing, N-cycling and N-fixing microbial diversity varied among the different soil treatments. β-glucosaminidase enzyme activity was high in control soils compared to P-fertilized and limed soils. Alkaline phosphatase showed increased activity in P-fertilized soils, whereas acid phosphatase showed increased activity in control soils. Therefore, the application of superphosphate and liming influences the relative abundance of bacterial communities with nutrient cycling and fixing functions which account for nutrient bioavailability in acidic and nutrient stressed grassland ecosystem soils.

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Section: Discussionsupporting

confidence: 81%

Soil microbes and associated extracellular enzymes largely impact nutrient bioavailability in acidic and nutrient poor grassland ecosystem soils

Ndabankulu

Egbewale

Tsvuura

et al. 2022

Sci Rep

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“…degradation. Long-term scientific research by Gautam and co-authors has shown a clear advantage of organic over mineral fertilization [38].…”

Section: Abundance Of Different Physiological Groups Of Soil Microorg...mentioning

confidence: 99%

“…However, the use of mineral fertilizers to increase fertility leads to complete soil degradation. Long-term scientific research by Gautam and co-authors has shown a clear advantage of organic over mineral fertilization [38].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Organic Fertilizers on the Abundance of Soil Microorganism Communities, Agrochemical Indicators, and Yield in East Lithuanian Light Soils

Sivojiene

Kačergius

Bakšienė

et al. 2021

Plants

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Soil microorganisms are one of the main indicators used for assessing the stability of the soil ecosystem, the metabolism in the soil, and its fertility. The most important are the active soil microorganisms and the influence of the fertilizer applied to the soil on the abundance of these microorganisms. We aimed to investigate how the applied organic fertilizers affect the most active soil microorganisms, which determine the soil fertility and stability. Fungi, yeast-like fungi abundance, and abundance of three physiological groups of bacteria were analyzed: non-symbiotic diazotrophic, organotrophic, and mineral nitrogen assimilating. This study is valuable because relatively few similar studies have been performed on infertile Lithuanian soils. The first results of a long-term study were obtained. The results show the effect of fertilizers on trends in the changes of microorganism community diversity; however, more analysis is needed to assess the impact of organic fertilizers on the most active soil microorganisms. Therefore, the investigation was continued. The results of the 2020 quantitative analysis of culturable soil microorganisms show that the highest abundance of organotrophic and non-symbiotic diazotrophic bacteria were recorded during the summer season. Meanwhile, the abundance of bacteria assimilating mineral nitrogen and fungi was higher in autumn. Agrochemical parameters were determined at the beginning of the experiment. The highest concentration of Nmin in the soil was determined after fertilizing the plants with the combination of granulated poultry manure (N170) + biological substance Azotobacter spp. The yield of barley was calculated. It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers.

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“…India having merely 2.4% of the world's total land area yet support 18% world population (Hinz et al, 2020); which implies the intensive and extensive use of agriculture land and the land pressure is huge for productivity. In such scenario, mineral fertiliser usage has been intensified in recent years to achieve higher productivity (Fig1); consequently led to inferior soil health and soil degradation (Gautam et al, 2020). Soil degradation is majorly due to microorganism microhabitat toxicity which is result of excessive fertiliser application; Soil microbial community structure is the indicator to analyse and identify the microbial groups on verge of death or loss completely from community structure in any land use system.…”

Section: Injudicious Use Of Fertilisers and Pesticides: Microbial Community Shift And Diversity Lossmentioning

confidence: 99%

Developing nation’s soil microbial community shifts and diversity loss: leading towards major ecological threat

Kumar

Sahu

Jayanthi

2021

ECJ

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Nature does not discriminate and has no boundaries; however only developing nations faces huge food security issues and in such circumstances much of importance has been emphasised on food production technologies but studies and research on concealed factor behind food production i.e biogeochemical drivers were largely overlooked. Injudicious agricultural practices; for instance profound use of agrochemicals in continuous and unmonitored way may had already situate many soil microbial species in verge of extinction consequently creating ecological imbalance. With huge land pressure for crop production and lack of upto date technologies of preciseness, most of the developing nation which includes the whole of Africa, almost all Asian countries and numerous other island states faces the agricultural land degradation issues; one of the major reason for such degradation is missing out of ecological drivers i.e soil microbial diversity. Anthropogenic activities application of fertilisers, land use changes (LUC), land intensification, crop diversification, irrigation management etc accelerates the soil microbial community shifts and microbial diversity loss predominately in developing nations. In this short communication, we address the concerns faced by the developing nations to prevent the soil microbial community shift and diversity loss. Also we propose the each exported commodity may have specific tax included which may be utilised by soil scientist from developing nations for studying the current soil microbial shifts and diversity loss due to agriculture management practices more efficiently.

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Responses of soil microbial community structure and enzymatic activities to long-term application of mineral fertilizer and beef manure

Cited by 34 publications

References 59 publications

Soil microbes and associated extracellular enzymes largely impact nutrient bioavailability in acidic and nutrient poor grassland ecosystem soils

Soil microbes and associated extracellular enzymes largely impact nutrient bioavailability in acidic and nutrient poor grassland ecosystem soils

The Influence of Organic Fertilizers on the Abundance of Soil Microorganism Communities, Agrochemical Indicators, and Yield in East Lithuanian Light Soils

Developing nation’s soil microbial community shifts and diversity loss: leading towards major ecological threat

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