SE—Structure and Environment

Solano, M.L.; Iriarte, Fanny; Ciria, P.; Negro, M.J.

doi:10.1006/jaer.2001.0703

Cited by 74 publications

(6 citation statements)

References 38 publications

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“…Unlike windrow composting, stockpiled manure is not mechanically turned or mixed, leading to regions of anaerobic decomposition and a lower and shorter thermophilic period (Larney et al, 2006;Sura et al, 2014). However, manure stockpiling is more economical than windrow composting in terms of initial capital investment, fuel, and labor costs (Solano et al, 2001).…”

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confidence: 99%

Dissipation of Antimicrobial Resistance Determinants in Composted and Stockpiled Beef Cattle Manure

Sura

Zaheer

et al. 2016

J. Environ. Qual.

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Windrow composting or stockpiling reduces the viability of pathogens and antimicrobial residues in manure. However, the impact of these manure management practices on the persistence of genes coding for antimicrobial resistance is less well known. In this study, manure from cattle administered 44 mg of chlortetracycline kg feed (dry wt. basis) (CTC), 44 mg of CTC and 44 mg of sulfamethazine kg feed (CTCSMZ), 11 mg of tylosin kg feed (TYL), and no antimicrobials (control) were composted or stockpiled over 102 d. Temperature remained ≥55°C for 35 d in compost and 2 d in stockpiles. Quantitative PCR was used to measure levels of 16S rRNA genes and tetracycline [(B), (C), (L), (M), (W)], erythromycin [(A), (B), (F), (X)], and sulfamethazine [(1), (2)] resistance determinants. After 102 d, 16S rRNA genes and all resistance determinants declined by 0.5 to 3 log copies per gram dry matter. Copies of 16S rRNA genes were affected ( < 0.05) by antimicrobials with the ranking of control > CTC = TYL > CTCSMZ. Compared with the control, antimicrobials did not increase the abundance of resistance genes in either composted or stockpiled manure, except (M) and (2) in CTCSMZ ( < 0.05). The decline in 16S rRNA genes and resistance determinants was higher ( < 0.05) in composted than in stockpiled manure. We conclude that composting may be more effective than stockpiling in reducing the introduction of antimicrobial resistance genes into the environment before land application of manure.

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confidence: 99%

Dissipation of Antimicrobial Resistance Determinants in Composted and Stockpiled Beef Cattle Manure

Sura

Zaheer

et al. 2016

J. Environ. Qual.

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“…Thus, for the production of quality compost, efficient management techniques for manure composting is a necessary pre-requisite. In order to obtain a quality product in less time and at a lower cost, various different aeration techniques, bulking agents, substrate-conditioning feed stocks, and other available options have been used for the composting of manure [153,154]. The bulking agent added during composting of animal manure improves the mineralization rate of the substrate by optimizing its properties like porosity, humidity content, pH, particle density, C/N ratio, etc.…”

Section: Animal Manurementioning

confidence: 99%

Fertilization of Microbial Composts: A Technology for Improving Stress Resilience in Plants

Ahmed,

Noman,

et al. 2023

Plants

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Microbial compost plays a crucial role in improving soil health, soil fertility, and plant biomass. These biofertilizers, based on microorganisms, offer numerous benefits such as enhanced nutrient acquisition (N, P, and K), production of hydrogen cyanide (HCN), and control of pathogens through induced systematic resistance. Additionally, they promote the production of phytohormones, siderophore, vitamins, protective enzymes, and antibiotics, further contributing to soil sustainability and optimal agricultural productivity. The escalating generation of organic waste from farm operations poses significant threats to the environment and soil fertility. Simultaneously, the excessive utilization of chemical fertilizers to achieve high crop yields results in detrimental impacts on soil structure and fertility. To address these challenges, a sustainable agriculture system that ensures enhanced soil fertility and minimal ecological impact is imperative. Microbial composts, developed by incorporating characterized plant-growth-promoting bacteria or fungal strains into compost derived from agricultural waste, offer a promising solution. These biofertilizers, with selected microbial strains capable of thriving in compost, offer an eco-friendly, cost-effective, and sustainable alternative for agricultural practices. In this review article, we explore the potential of microbial composts as a viable strategy for improving plant growth and environmental safety. By harnessing the benefits of microorganisms in compost, we can pave the way for sustainable agriculture and foster a healthier relationship between soil, plants, and the environment.

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“…[19,34] Stockpiling is described as 'static pile' or 'passive composting' which relies on convective airflow for aeration but is an economical option in terms of initial capital investment, fuel and labor costs. [29,35] However, spatial heterogeneity of micro-environmental conditions within stockpiles might influence its effectiveness in degrading antimicrobial residues and ARG in manure prior to land application.…”

Section: Temperature Physiochemical Properties and 16s Rdnamentioning

confidence: 99%

Degradation of antimicrobial resistance genes within stockpiled beef cattle feedlot manure

Xu¹,

Schwinghamer

Sura

et al. 2021

Journal of Environmental Science and Health, Part A

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Degradation of antimicrobial resistance genes (ARG) in manure from beef cattle administered (kg À1 feed) 44 mg of chlortetracycline (CTC), 44 mg of chlortetracycline plus sulfamethazine (CTCSMZ), 11 mg of tylosin (TYL), or no antimicrobials (Control) was examined. Manure was stockpiled and quantitative PCR (qPCR) was used to assess tetracycline [tet(C), (L), (M), (W)], erythromycin [erm(A), (B), (F), (X)], and sulfamethazine [sul(1), ( 2)] ARG and 16S rDNA. After 102 d, copies of all ARG decreased by 0.3 to 1.5 log 10 copies (g dry matter) À1 . Temperature in the interior of piles averaged ! 55 C for 10 d, except for CTCSMZ, but did not reach 55 C at pile exteriors. Compared to Control, CTCSMZ increased (P < 0.05) tet(C), tet(M), tet(W), sul(1), and sul(2) in stockpiled manure. Copies of 16S rDNA remained higher (P < 0.05) in CTCSMZ than Control for the first 26 d. Levels of most ARG did not differ between the interior and exterior of stockpiles. Our results suggest that stockpiled manure would still introduce ARG to land upon manure application, but at levels lower than if manure was applied fresh.

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SE—Structure and Environment

Cited by 74 publications

References 38 publications

Dissipation of Antimicrobial Resistance Determinants in Composted and Stockpiled Beef Cattle Manure

Dissipation of Antimicrobial Resistance Determinants in Composted and Stockpiled Beef Cattle Manure

Fertilization of Microbial Composts: A Technology for Improving Stress Resilience in Plants

Degradation of antimicrobial resistance genes within stockpiled beef cattle feedlot manure

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