Excessive use of tetracycline antibiotics in poultry farming results in significant concentrations of these drugs and tetracycline resistance genes (TRGs) in chicken manure, impacting both environmental and human health. Our research represents the first investigation into the removal dynamics of chlortetracycline (CTC) and TRGs in different layers of an ex situ fermentation system (EFS) for chicken waste treatment. By pinpointing and analyzing dominant TRGs-harboring bacteria and their interactions with environmental variables, we've closed an existing knowledge gap. Findings revealed that CTC's degradation half-lives spanned 3.3-5.8 days across different EFS layers, and TRG removal efficiency ranged between 86.82% and 99.52%. Network analysis highlighted Proteobacteria and Actinobacteria's essential roles in TRGs elimination, whereas Chloroflexi broadened the potential TRG hosts in the lower layer. Physical and chemical conditions within the EFS influenced microbial community diversity, subsequently impacting TRGs and integrons. Importantly, our study reports that the middle EFS layer exhibited superior performance in eliminating CTC and key TRGs (tetW, tetG, and tetX) as well as intI2. Our work transcends immediate health and environmental remediation by offering insights that encourage sustainable agriculture practices.
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http://dx.doi.org/10.1016/j.jenvman.2024.120614 | DOI Listing |
Sci Total Environ
January 2025
Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China. Electronic address:
Composting urban and rural wastes into organic fertilizers for land application is considered the best way to dispose of and recycle waste resources. However, there are some concerns about the long-term effects of applying various organic fertilizers on soils, food safety, and health risks derived from heavy metal(loid)s (HMs). A long-term field experiment was conducted to evaluate the effects of continuous application of chicken manure compost (CM), sewage sludge compost (SSC), and domestic waste compost (DWC) for wheat on the accumulation, transfer, and health risks of HMs.
View Article and Find Full Text PDFJ Hazard Mater
January 2025
Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, National Agricultural Experiment Station for Agricultural Environment (Luhe), Ministry of Agriculture and Rural Affairs; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
The losses of reactive gaseous nitrogen (N), including ammonia (NH) and nitrous oxide (NO), represent a pressing environmental issue during composting. However, the impact of hydrothermal carbonization aqueous phase (HAP) on compost gaseous N emissions and the underlying mechanisms remain largely unexplored. Herein, Quercus acutissima leaves-derived HAP and its modified HAP (MHAP) were added to the chicken manure compost at 5 % (w/w) and 10 % (w/w) applied rates to observe changes in NH and NO fluxes, compost properties and bacterial communities.
View Article and Find Full Text PDFBMC Vet Res
January 2025
Department of Poultry and Rabbit Diseases, Faculty of Veterinary Medicine, Aswan University, Aswan, 81528, Egypt.
Avian coccidiosis is one of the many disorders that seriously harm birds' digestive systems. Nowadays the light is shed on using Phytochemical/herbal medicines as alternative natural anti-coccidial chemical-free standards. Consequently, this study aimed to investigate the impact of lawsonia inermis powder (LIP), and Acacia nilotica aqueous extract (ANAE), on growth performance, serum biochemical, antioxidant status, cytokine biomarkers, total oocyst count and intestinal histopathology of broiler chickens challenged with coccidiosis.
View Article and Find Full Text PDFEnviron Sci Ecotechnol
January 2025
Earth Systems and Global Change Group, Environmental Sciences Department, Wageningen University & Research, Droevendaalsesteeg 4, Wageningen, 6708 PB, the Netherlands.
J Environ Manage
January 2025
Department of Soil and Water Sciences, College of Land Science and Technology, China Agricultural University, Beijing, 100193, China.
Microbial inoculations have emerged as a key approach to address the low natural microbial activity of traditional composting technologies. It is crucial for successfully promoting manure composting to understand the influences of microbial inoculations on fungal communities and its mechanisms. To investigate the effects of microbial inoculation on diversity characteristics, tropic mode, and co-occurrence network of fungal communities during composting, an aerobic composting experiment of chicken manure inoculated with microbial agents was performed.
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