Diversity and abundance of denitrifiers during cow manure composting

Meng, Qingxin; Xu, Xiuhong; Zhang, Wenhao; Cheng, Long; Men, Mengqi; Xu, Benshu; Deng, Lei; Sun, Xuewei

doi:10.1016/j.ram.2018.08.003

Cited by 6 publications

(3 citation statements)

References 38 publications

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“…For the nirS, nirK, and nosZ genes involved in denitrification, the dynamics of several taxa might contribute to the general increase in their relative abundance with plant age. For example, Burkholderia, which increased in their relative abundance by plant age in the field samples, has been reported to harbor copies of these denitrification genes (Yoshida et al, 2010;Saarenheimo et al, 2015;Espenberg et al, 2018;Meng et al, 2018). Moreover, the increase in nirK, and by trend nirS, might be correlated with the increase in the relative abundance of Acidobacteriales by plant age in the field nursery.…”

Section: Bacterial N-cycling Potential Is Dynamic Across Plant Agementioning

confidence: 98%

Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development

et al. 2020

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Abies nordmanniana is an economically important tree crop widely used for Christmas tree production. After initial growth in nurseries, seedlings are transplanted to the field. Rhizosphere bacterial communities generally impact the growth and health of the host plant. However, the dynamics of these communities during A. nordmanniana growth in nurseries, and during transplanting, has not previously been addressed. By a 16S rRNA gene amplicon sequencing approach, we characterized the composition and dynamics of bacterial communities in the rhizosphere during early plant growth in field and greenhouse nurseries and for plants transplanted from the greenhouse to the field. Moreover, the N-cycling potential of rhizosphere bacteria across plant age was addressed in both nurseries. Overall, a rhizosphere core microbiome of A. nordmanniana, comprising 19.9% of the taxa at genus level, was maintained across plant age, nursery production systems, and even during the transplantation of plants from the greenhouse to the field. The core microbiome included the bacterial genera Bradyrhizobium, Burkholderia, Flavobacterium, Pseudomonas, Rhizobium, Rhodanobacter, and Sphingomonas, which harbor several N-fixing and plant growthpromoting taxa. Nevertheless, both plant age and production system caused significant changes in the rhizosphere bacterial communities. Concerning community composition, the relative abundance of Rhizobiales (genera Rhizobium, Bradyrhizobium, and Devosia) was higher in the rhizosphere of field-grown A. nordmanniana, whereas the relative abundance of Enterobacteriales and Pseudomonadales (genus Pseudomonas) was higher in the greenhouse. Analysis of community dynamics across plant age showed that in the field nursery, the most abundant bacterial orders showed more dynamic changes in their relative abundance in the rhizosphere than in the bulk soil. In the Frontiers in Microbiology | www.frontiersin.org March 2020 | Volume 11 | Article 198 Garcia-Lemos et al.Under the Christmas Tree greenhouse, age-dependent dynamics even occurred but affected different taxa than for the field-grown plants. The N-cycling potential of rhizosphere bacterial communities showed an increase of the relative abundance of genes involved in nitrogen fixation and denitrification by plant age. Similarly, the relative abundance of reported nitrogen-fixing or denitrifying bacteria increased by plant age. However, different community structures seemed to lead to an increased potential for nitrogen fixation and denitrification in the field versus greenhouse nurseries.

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Section: Bacterial N-cycling Potential Is Dynamic Across Plant Agementioning

confidence: 98%

Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development

et al. 2020

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“…No-till manure amended soils had greater anaerobe abundance than NT unamended soils (Figure 3, Supplementary Table S3, and Supplementary Figure S4). Although manure amendments may directly add anaerobe DNA to soil, 59,60 it is unlikely that the anaerobe DNA from manure application would overshadow anaerobe abundance from the native soil community. In batch incubations, Ho et al (2015) found that 10% w/w manure amendments increased mcrA abundance in soils by stimulating soil-borne methanogens; however, methanogens from the manure itself had little to no effect on mcrA abundance.…”

Section: Resultsmentioning

confidence: 99%

Microbial Proxies for Anoxic Microsites Vary with Management and Partially Explain Soil Carbon Concentration

Lacroix,

Gomes,

Heitmann

et al. 2024

Environ. Sci. Technol.

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“…Phenylobacterium can degrade part macromolecular organic matter (Weon et al 2008 ), and promote HA biosynthesis. Meng et al ( 2019 ) found that Pseudoxanthomonas (phylum Proteobacteria) possessed a good capacity to degrade cellulose, and made a significant contribution to phosphorus removal during cattle manure composting.…”

Section: Discussionmentioning

confidence: 99%

Humic acid biosynthesis and bacterial community evolution during aerobic composting of rice straw

Gao,

Liu,

Wang

et al. 2024

Appl Microbiol Biotechnol

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In this study, the effects of inoculum ratio, substrate particle size and aeration rate on humic acid (HA) biosynthesis during aerobic composting of rice straw were investigated, respectively. The contents of total organic carbon, total nitrogen and HA, as well as lignocellulose degradation in the composting were evaluated, respectively. It is found that the maximal HA yield of 356.9 g kg−1 was obtained at an inoculum ratio of 20%, a substrate particle size of 0.83 mm and an aeration rate of 0.3 L·kg−1 DM min−1 in the process of composting. The changes of microbial communities and metabolic functions at different stages of the composting were also analyzed through high-throughput sequencing. The result demonstrates that Proteobacteria, Firmicutes, Bacteroidetes and Actinobacteria were the dominant phyla and their relative abundance significantly varied over time (p < 0.05), and Rhizobium, Phenylobacterium, Pseudoxanthomonas and Paenibacillus were positively related to HA content in the compost. Furthermore, the metabolic function profiles of bacterial community indicate that these functional genes in carbohydrate metabolism and amino acid metabolism were involved in lignocellulose biodegradation and HA biosynthesis. This work may be conducive to explore new regulation strategy to improve bioconversion efficiency of agricultural residues to applicable biofertilizers. Key points • Temperature, pH, TOC, TN and C/N caused a great influence on humic acids synthesis • The succession of the microbial community during the composting were evaluated • The metabolisms of carbohydrate and amino acids were involved in HA synthesis Graphical abstract

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Diversity and abundance of denitrifiers during cow manure composting

Cited by 6 publications

References 38 publications

Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development

Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development

Microbial Proxies for Anoxic Microsites Vary with Management and Partially Explain Soil Carbon Concentration

Humic acid biosynthesis and bacterial community evolution during aerobic composting of rice straw

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