Synergetic effect and mechanism of elementary sulphur, MgSO4 and KH2PO4 progressive reinforcement on pig manure composting nitrogen retention

Wang, Yang; Wang, Jingwen; Wu, Xiaorong; Zhao, Rongqin; Zhang, Zengqiang; Zhu, Juanjuan; Azeem, Muhammad; Xiao, Ran; Pan, Junting; Zhang, Xiu; Li, Ronghua

doi:10.1016/j.envpol.2023.121934

Cited by 14 publications

(3 citation statements)

References 46 publications

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“…2 b, in the experimental groups CaPM1 and CaPM2, the main phyla were Proteobacteria (30.11% and 20.29%), Firmicutes (31.48% and 40.82%), and Actinobacteria (24.91% and 33.67%), which is to previous studies (Li et al 2022 ; Zhu et al 2021 ). However, this is different from the results of Wang et al ( 2023a , b ), which showed up to 77.46% ~ 92.83% of the Firmicutes during composting, a result much higher than the values of the present study. The dominant genera in C were unclassified Acidobacteriales (6.96%), unclassified Comamonadaceae (6.69%), and Sphingomonas (6.23%), but the dominant genera in CaPM1 and CaPM2 were Pseudoclavibacter (11.75% and 36.63%), Thermobifida (9.19% and 16.7%), and Bacillus (7.99% and 8.83%) (Fig.…”

Section: Resultscontrasting

confidence: 99%

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Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Jiang,

Dai,

Wang

et al. 2024

Appl Microbiol Biotechnol

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This study was conducted to investigate the effects of Ca(H2PO4)2 and MgSO4 on the bacterial community and nitrogen metabolism genes in the aerobic composting of pig manure. The experimental treatments were set up as control (C), 1% Ca(H2PO4)2 + 2% MgSO4 (CaPM1), and 1.5% Ca(H2PO4)2 + 3% MgSO4 (CaPM2), which were used at the end of composting for potting trials. The results showed that Ca(H2PO4)2 and MgSO4 played an excellent role in retaining nitrogen and increasing the alkali-hydrolyzed nitrogen (AN), available phosphorus (AP), and available potassium (AK) contents of the composts. Adding Ca(H2PO4)2 and MgSO4 changed the microbial community structure of the compost. The microorganisms associated with nitrogen retention were activated. The complexity of the microbial network was enhanced. Genetic prediction analysis showed that the addition of Ca(H2PO4)2 and MgSO4 reduced the accumulation of nitroso-nitrogen and the process of denitrification. At the same time, despite the reduction of genes related to nitrogen fixation, the conversion of ammonia to nitrogenous organic compounds was promoted and the stability of nitrogen was increased. Mantel test analysis showed that Ca(H2PO4)2 and MgSO4 can affect nitrogen transformation-related bacteria and thus indirectly affect nitrogen metabolism genes by influencing the temperature, pH, and organic matter (OM) of the compost and also directly affected nitrogen metabolism genes through PO43− and Mg2+. The pot experiment showed that composting with 1.5% Ca(H2PO4)2 + 3% MgSO4 produced the compost product that improved the growth yield and nutrient content of cilantro and increased the fertility of the soil. In conclusion, Ca(H2PO4)2 and MgSO4 reduces the loss of nitrogen from compost, activates nitrogen-related bacteria and genes in the thermophilic phase of composting, and improves the fertilizer efficiency of compost products. Key points • Ca(H2PO4)2 and MgSO4 reduced the nitrogen loss and improved the compost effect • Activated nitrogen-related bacteria and altered nitrogen metabolism genes • Improved the yield and quality of cilantro and fertility of soil

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Section: Resultscontrasting

confidence: 99%

“…The dominant genera in CaPM1 and CaPM2 were Pseudoclavibacter , Thermobifida , and Bacillus . Thermobifida and Bacillus are the main genera of organic matter degrading bacteria commonly found in the thermophilic stage of composting (Zhao et al 2022 ; Wang et al 2023a , b ).…”

Section: Discussionmentioning

confidence: 99%

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Jiang,

Dai,

Wang

et al. 2024

Appl Microbiol Biotechnol

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“…When the compost entered the cooling phase, secondary maturation occurred again under all treatments except for M, and the peak was highest under FM, which the CK treatment had the lowest peak. Indeed, the FM treatment effectively promoted the degradation of residual organic matter by microorganisms and advanced the compost maturation process (Wang et al, 2023b). During the whole composting process, the pH values under CK, M, SM, and GM all tended to increase initially, before then decreasing slightly and stabilizing under conditions with sufficient oxygen and nutrients in the early stage of composting when microbial metabolism was vigorous, organic acids were decomposed in large quantities (Li et al, 2015).…”

Section: Effects Of Magnetized Water Additive Package On the Physicoc...mentioning

confidence: 99%

Microbial functional metabolism drives the effects of exogenous additives on carbon storage and degradation during aerobic composting

Li,

Duan,

Qin

et al. 2024

Front. Environ. Sci.

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This study conducted composting experiments using cow manure and wheat straw, employing five different treatment methods (CK, magnetized water treatment-M, magnetized water combined with biochar treatment-SM, magnetized water combined with ferrous sulfate treatment-FM, magnetized water combined with Bacillus megaterium treatment-GM), aiming to accelerate the composting maturation process and reduce carbon loss. The results of the experiments showed that the SM treatment entered the thermophilic phase on the second day and lasted for 9 days, resulting in the best maturation effect. The FM treatment increased the carbon content in the compost, effectively preserving carbon sources. principal component analysis analysis revealed significant differences in microbial community structures due to different treatments. Additionally, structural equation modeling observations indicated that different treatments affected the compost environment, thereby influencing microbial activity and carbon content. Overall, the SM treatment positively affected the compost maturation process, while the FM treatment effectively preserved carbon sources in the compost.

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Effect of nitrogen retention composite additives Ca(H2PO4)2 and MgSO4 on the degradation of lignocellulose, compost maturation, and fungal communities in compost

Jiang,

Dai,

Wang

et al. 2024

Environ Sci Pollut Res

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Synergetic effect and mechanism of elementary sulphur, MgSO4 and KH2PO4 progressive reinforcement on pig manure composting nitrogen retention

Cited by 14 publications

References 46 publications

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Microbial functional metabolism drives the effects of exogenous additives on carbon storage and degradation during aerobic composting

Effect of nitrogen retention composite additives Ca(H2PO4)2 and MgSO4 on the degradation of lignocellulose, compost maturation, and fungal communities in compost

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