Journal
BIORESOURCE TECHNOLOGY
Volume 332, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125129
Keywords
Lignocellulose biomass composting; Nitrogen source supply; Humification process; Functional bacterial taxa; Network modularization; Synergy of bacterial community
Funding
- National Natural Science Foundation of China [51778116, 51878132, 51978131]
- National Key Research and Development Project [2019YFC1906403]
- Key Laboratory of Forest Ecology in Tibet Plateau (Tibet Agriculture & Animal Husbandry University), Ministry of Education, China [XZAJYBSYS-2020-02]
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This study explored the effects of chicken manure and urea as nitrogen sources on the humification process during lignocellulose biomass composting. The results showed that chicken manure supply can select specific functional bacterial taxa and stimulate the collaborative division of bacterial community, benefiting the effective transformation of organic components.
This study investigated effects of high-nitrogen source (urea) (R_UR) and protein-like nitrogen source (chicken manure) (R_CM) on humification process during lignocellulose biomass composting. It demonstrated that decreasing ratio of crude fiber (CF), polysaccharide (PS) and amino acids (AAs) in R_CM (29.75%, 53.93% and 73.73%, respectively) was higher than that in R_UR (14.73%, 28.74% and 51.92%, respectively). Humic substance (HS) concentration increased by 7.51% and 73.05% during R_UR and R_CM composting, respectively. The lower total links, more independent modularization and higher proportion of positive correlations between functional bacteria and organic components was observed with R_CM network than R_UR, indicating that protein-like nitrogen source supply may alleviate competition within bacterial community. Moreover, chicken manure supply favorably selects greater special functional bacterial taxa (Pusillimonas, Pedomicrobium, Romboustia and other 24 genus) related to AAs and stimulates the collaborative division of bacterial community. This is significance for strengthening effective transformation of organic components.
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