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| Bacterial community promotes the dissolution of inactive phosphorus in the residue-cow manure compost |
| Received:July 19, 2024 |
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| KeyWord:composting;fungal residue;bacterial communities;phosphorus components |
| Author Name | Affiliation | E-mail | | LI Ying | College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing 163319, China | | | ZHAO Liqin | College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing 163319, China | daqingzhaoliqin@163.com | | WANG Jiaming | College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing 163319, China | | | CHEN Weiye | College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing 163319, China | | | SUN Qing | College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing 163319, China | |
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| Abstract: |
| The objective of this study is to explore the effect of bacterial community on the solubility of inactive phosphorus in bovine manure residue compost. In this study, 100% bacterial residue compost was used as the control group（CK）and bacterial residue∶cow manure=7∶3 compost as the treatment group（CD）, and the effects of bacterial community on Hedley phosphorus components H2O-P, NaHCO3-P, NaOH-P, HCl-P and residual phosphorus（Residual-P）in cow fecal residue compost were studied by high-throughput sequencing and sequential extraction method, and the relationship between environmental factors and phosphorus components was analyzed. The results showed that the compost temperature, total nitrogen, total organic carbon（TOC）, available phosphorus content, EC value and C/N of the CD treatment were significantly higher than those of CK, but the pH decreased significantly, which improved the quality of compost products. The addition of cow manure affected the transformation of phosphorus components in compost, and the H2O-Pcontent increased significantly in the warming, high temperature and cooling stages, but decreased significantly in the decomposition stage. Compared with CK, the content of NaHCO3-inorganic P（NaHCO3-Pi）in CD treatment was significantly increased, and the content of NaHCO3-organic P（NaHCO3-Po）was not significantly changed. The addition of cow manure significantly reduced the content of NaOH-inorganic P（NaOH-Pi）during the decomposition stage of the compost, and had little effect on NaOH-organic P（NaOH-Po）and Residual-P, but significantly inhibited the increase of inactive phosphorus（HCl-P）, and the increase of HCl-P in CD treatment was lower than that of CK. The relative abundances of Proteobacteria, Firmicutes, Chloroflexi, Pseudomonas, Ruminofilibacter and Fermentimonas were significantly higher than those in CK by adding cow manure. Promotes the conversion of inactive phosphorus. The SEM model showed that the addition of cow manure enhanced the ability of the bacterial community to dissolve inactive phosphorus, and the HCl-P in the CD treatment was jointly regulated by pH, TOC, bacterial community α diversity and β diversity, while the main deformation of inactive phosphorus in the control group was affected by pH and β diversity of bacterial community. The addition of cow manure can make the compost of fungus residue rise rapidly, prolong the high temperature period of the compost, and promote the dissolution of HCl-P by affecting the structure and composition of bacterial community, thereby improving the quality of compost. |
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