Exploring the microbial mechanisms of organic matter transformation during pig manure composting amended with bean dregs and biochar

Yang, Yajun; Awasthi, Mukesh Kumar; Bao, Huanyu; Bie, Jingya; Lei, Shuang; Lv, Jialong

doi:10.1016/j.biortech.2020.123647

Cited by 112 publications

(28 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…IC was produced by the addition of bean dregs and biochar to the compost product. Previous studies confirmed that IC products increased SOC and TN contents more than compost products 29 , 30 . All OA materials were dried at 55 °C and then sieved through a 2 mm mesh.…”

Section: Methodsmentioning

confidence: 57%

Response of N2O emission and denitrification genes to different inorganic and organic amendments

Yang

Liu

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

Denitrification is a key biochemical process in nitrogen cycling and nitrous oxide (N2O) production. In this study, the impacts of different inorganic and organic amendments (OAs) on the abundance of denitrifying genes (nirS, nirK and nosZ) and the level of N2O emission were examined with incubation experiments. Six treatments included the indicated applications: (i) no fertilization (CK); (ii) urea application alone (U); (iii) wheat straw plus urea (U + WS); (iv) pig manure plus urea (U + PM); (v) compost product plus urea (U + CP); and (vi) improved compost product plus urea (U + IC). The results indicated that all fertilization treatments increased accumulative N2O emissions compared with the CK treatment. The U + WS, U + PM and U + CP treatments increased N2O emissions by 2.12–141.3%, and the U + IC treatment decreased N2O emissions by 23.24% relative to the U treatment. nirK was the dominant denitrification gene rather than nirS and nosZ found in soil. Additionally, the highest abundance of nirK gene was that with the U + PM treatment, and the lowest was that with the U + IC treatment. Additionally, changes in the nirK gene were highly correlated with levels of dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and nitrate nitrogen (NO3–N). Automatic linear modeling revealed that N2O emission was closely related to the nirK gene, DOC and NO3–N. Overall, the use of urea and improved compost as co-amendments retarded N2O emission to a considerable degree compared with other OA additions.

show abstract

Section: Methodsmentioning

confidence: 57%

Response of N2O emission and denitrification genes to different inorganic and organic amendments

Yang

Liu

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…2 b). The increase in pH was attributed to volatile ammonia and ammonium produced by organic nitrogen decomposition [ 31 ]. Total Kjeldahl nitrogen (TKN) concentration increased in both composts because of the weight reduction of compost mass caused by organic degradation (Fig.…”

Section: Resultsmentioning

confidence: 99%

Development of a consortium-based microbial agent beneficial to composting of distilled grain waste for Pleurotus ostreatus cultivation

Zhou

et al. 2021

Biotechnol Biofuels

View full text Add to dashboard Cite

Background Pleurotus ostreatus is an edible mushroom popularly cultivated worldwide. Distilled grain waste (DGW) is a potential substrate for P. ostreatus cultivation. However, components in DGW restrict P. ostreatus mycelial growth. Therefore, a cost-effective approach to facilitate rapid P. ostreatus colonization on DGW substrate will benefit P. ostreatus cultivation and DGW recycling. Results Five dominant indigenous bacteria, Sphingobacterium sp. X1, Ureibacillus sp. X2, Pseudoxanthomonas sp. X3, Geobacillus sp. X4, and Aeribacillus sp. X5, were isolated from DGW and selected to develop a consortium-based microbial agent to compost DGW for P. ostreatus cultivation. Microbial agent inoculation led to faster carbohydrate metabolism, a higher temperature (73.2 vs. 71.2 °C), a longer thermophilic phase (5 vs. 3 days), and significant dynamic changes in microbial community composition and diversity in composts than those of the controls. Metagenomic analysis showed the enhanced microbial metabolisms, such as xenobiotic biodegradation and metabolism and terpenoid and polyketide metabolism, during the mesophilic phase after microbial agent inoculation, which may facilitate the fungal colonization on the substrate. In accordance with the bioinformatic analysis, a faster colonization of P. ostreatus was observed in the composts with microbial inoculation than in control after composting for 48 h, as indicated from substantially higher fungal ergosterol content, faster lignocellulose degradation, and higher lignocellulase activities in the former than in the latter. The final mushroom yield shared no significant difference between composts with microbial inoculation and control, with 0.67 ± 0.05 and 0.60 ± 0.04 kg fresh mushroom/kg DGW, respectively (p > 0.05). Conclusion The consortium-based microbial agent comprised indigenous microorganisms showing application potential in composting DGW for providing substrate for P. ostreatus cultivation and will provide an alternative to facilitate DGW recycling.

show abstract

“…It is well known that biochar addition can effectively prevent greenhouse gas emissions and nutrient loss during compost fermentation [6]. It also can regulate the growth of microorganisms and sequester carbon [7]. In addition, the application of an organic fertilizer with biochar could improve soil health, increase crop yields [8] and induce plant disease resistance [9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Bio-Fertilizer Produced by Prickly Ash Seeds with Biochar Addition Induces Soil Suppressiveness against Black Shank Disease on Tobacco

et al. 2021

View full text Add to dashboard Cite

A novel bio-fertilizer, produced from prickly ash seeds (PAS), Bacillus subtilis and biochar, was evaluated for its disease-preventing potential on tobacco black shank caused by Phytophthora nicotianae. The results showed that biochar promoted the growth of Tpb55 in PAS and increased the pH of the organic fertilizer. The final concentration of B. subtilis could reach 1.7 × 1010 cfu g−1 in the biological organic fertilizer (PBB) under the optimal medium under conditions of solid-state fermentation. PBB exhibited a strong fumigation effect on P. nicotianae, including inhibiting mycelium growth, reducing the disease severity and decreasing the pathogen population in rhizospheric soil. PBB treatment also could significantly increase the pH of acidified soil and improve soil nutrition content such as available K, alkali hydrolysable N and organic carbon. High-throughput pyrosequencing of 16S and 18S rRNA genes revealed that 4% PBB addition in soil had significant effects on the diversity and richness of fungi but not on that of bacteria. The microbial community structure was also shifted after PBB treatment. Some potentially beneficial microbes such as Bacillus, Mucor, Cunninghamella, Chitinophaga and Phenylobacterium were enriched, while potential pathogen Fusarium was significantly decreased. In conclusion, the agricultural waste PAS combined with biochar can replace soybean as a source for the production of biocontrol B. subtilis Tpb55, and the novel bio-fertilizer could effectively control tobacco black shank by pathogen inhibition, soil nutrient improvement and shifting the rhizomicrobial community.

show abstract

Exploring the microbial mechanisms of organic matter transformation during pig manure composting amended with bean dregs and biochar

Cited by 112 publications

References 43 publications

Response of N2O emission and denitrification genes to different inorganic and organic amendments

Response of N2O emission and denitrification genes to different inorganic and organic amendments

Development of a consortium-based microbial agent beneficial to composting of distilled grain waste for Pleurotus ostreatus cultivation

A Novel Bio-Fertilizer Produced by Prickly Ash Seeds with Biochar Addition Induces Soil Suppressiveness against Black Shank Disease on Tobacco

Contact Info

Product

Resources

About