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Effects of two strains of thermophilic nitrogen-fixing bacteria on nitrogen loss mitigation in cow dung compost.
Wang, Shaowen; Xu, Zhiming; Xu, Xuerui; Gao, Feng; Zhang, Kang; Zhang, Xin; Zhang, Xiu; Yang, Guoping; Zhang, Zengqiang; Li, Ronghua; Quan, Fusheng.
Afiliación
  • Wang S; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Xu Z; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Xu X; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Gao F; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Zhang K; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Zhang X; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China.
  • Zhang X; North Minzu University Ningxia Key Laboratory for the Development and Application of Microbial Resources in Extreme Environments, Yinchuan 750021, PR China.
  • Yang G; North Minzu University Ningxia Key Laboratory for the Development and Application of Microbial Resources in Extreme Environments, Yinchuan 750021, PR China.
  • Zhang Z; College of Natural Resources and Environment, Northwest A&F University, Yangling Shaanxi, 712100, PR China.
  • Li R; College of Natural Resources and Environment, Northwest A&F University, Yangling Shaanxi, 712100, PR China.
  • Quan F; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China. Electronic address: quanfusheng@nwafu.edu.cn.
Bioresour Technol ; 400: 130681, 2024 May.
Article en En | MEDLINE | ID: mdl-38599350
ABSTRACT
Excavating nitrogen-fixing bacteria with high-temperature tolerance is essential for the efficient composting of animal dung. In this study, two strains of thermophilic nitrogen-fixing bacteria, NF1 (Bacillus subtilis) and NF2 (Azotobacter chroococcum), were added to cow dung compost both individually (NF1, NF2) and mixed together (NF3; mixing NF1 and NF2 at a ratio of 11). The results showed that NF1, NF2, and NF3 inoculants increased the total Kjeldahl nitrogen level by 38.43%-55.35%, prolonged the thermophilic period by 1-13 d, increased the seed germination index by 17.81%, and the emissions of NH3 and N2O were reduced by 25.11% and 42.75%, respectively. Microbial analysis showed that Firmicutes were the predominant bacteria at the thermophilic stage, whereas Chloroflexi, Proteobacteria, and Bacteroidetes were the predominant bacteria at the mature stage. These results confirmed that the addition of the isolated strains to cow dung composting improved the bacterial community structure and benefited nitrogen retention.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compostaje / Nitrógeno Límite: Animals Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compostaje / Nitrógeno Límite: Animals Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido