Biochar influences the succession of microbial communities and the metabolic functions during rice straw composting with pig manure

Bacterial and Fungal Community Dynamics and Shaping Factors During Agricultural Waste Composting with Zeolite and Biochar Addition

“…A previous study indicated that after biochar addition, the abundances of Nitriliruptoraceae and Bacillaceae in the poultry manure increased, while those of Alcaligenaceae, Rhodispirillaceae, and Xanthomonadaceae in cow manure increased [39]. In the process of composting straw and pig manure, Firmicutes, Actinobacteria, and Proteobacteria were the dominant ones, and the relative abundance of Actinobacteria increased in a statistically significant way, especially its genus of Saccharomonospora [40]. The highest abundance of mesophilic bacteria, endospores bacteria, and actinomycetes were obtained after seven days of municipal solid waste composting with biochar addition [1].…”

“…The addition of biochar and zeolite increased the input of carbon source and stimulated the growth and reproduction of microbial communities. Biochar addition increased the richness of bacterial species associated with carbohydrate metabolism, amino acid metabolism, and energy metabolism during pig manure composting with rice straw with a biochar addition [40]. Biochar addition increased the respiration and decomposition rates, proving the promotion of microbial activity [1,17,45].…”

“…The variation analysis of the bacterial community showed that the activity of bacteria in the thermophilic period was controlled by WSC content and pile temperature, while the electrical conductivity and total amount of Kjeldahl nitrogen also affected the maturity of compost [51]. A previous study also indicated that the addition of biochar had a great effect on TN, and TN had the greatest effect on the bacterial community structure during the process of rice straw and pig manure composting [40].…”

Aceleração do Processo de Compostagem

“…Liu, Wang e Lei (2019) em sua pesquisa sobre o impacto positivo do biocarvão no equilíbrio térmico durante a compostagem de esterco suíno a temperatura ambiente relativamente baixa, constataram que o biocarvão prolonga significativamente a duração do estágio termofílico e portanto tem potencial para desempenhar um papel positivo na melhoria da compostagem aeróbica a baixa temperatura. Zhou et al (2019) estudando a influência do biocarvão na sucessão de comunidades microbianas e nas suas funções metabólicas, durante a compostagem de palha de arroz com esterco de porco, constataram que a adição de biocarvão melhorou a maturidade e fertilidade do composto, bem como regulou significativamente a estrutura e as funções da comunidade microbiana, acelerando o processo. Du et al (2019) pesquisando os efeitos do biocarvão na atividade e na estrutura da comunidade microbiana, durante a compostagem de lodo de esgoto, concluíram que o biocarvão, nas dosagens de 10% e 20%, promove a atividade de enzimas (desidrogenase, aril-sulfatase, protease, celulase, β-glicosidase e peroxidase) e das comunidades bacterianas, reduzindo o tempo de compostagem.…”

“…BiocarvãoO biocarvão é um aditivo bastante citado na literatura(Agyarko-Mintah et al, 2017; Akdeniz, 2019;Du et al, 2019;Godlewska et al, 2017;Liu et al, 2017;Liu, Wang, Lei, 2019; Sánchez-Monedero et al, 2018; Vandecasteele et al, 2016; Waqas et al, 2018; Zhang et Cad. Ciênc.Agrá., v. 12, p. 01-12, https://doi.org/10.35699/2447-6218.2020.20286al.,Zhou et al, 2019), merecendo um tópico à parte.…”