Mulches assist degraded soil recovery via stimulating biogeochemical cycling: metagenomic analysis

Liu, Fengqin; Yang, Jiale; Zhang, Yu; Yang, Shuilian; Zhang, Yifan; Chen, Yun; Shao, Yizhen; Gao, Dawen; Yuan, Zhiliang; Zhang, Yupeng

doi:10.1007/s00253-023-12824-6

Cited by 3 publications

(3 citation statements)

References 58 publications

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“…Organic mulching is an important practice for improving soil fertility and plant productivity in urban forest ecosystems. Our study revealed that organic mulching can significantly increase the soil nutrient contents ( Figure 2 ), similar to the results of other mulching experiments [ 25 , 26 ]. This phenomenon may be mainly attributed to the decomposition of organic mulches, which can influence multiple soil properties and, through these changes, can indirectly affect soil microbial communities [ 3 , 12 ].…”

Section: Discussionsupporting

confidence: 90%

“…It is also beneficial to the carbon and nitrogen cycle [ 42 ]. Organic mulching changes soil physicochemical properties, increases soil moisture, and thus changes the biogeochemical cycling of C, N, and P [ 26 ]. Our research indicated that soil bacterial groups under organic mulching treatments mainly acted on the C and N cycling of functional pathways.…”

Section: Discussionmentioning

confidence: 99%

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How Organic Mulching Influences the Soil Bacterial Community Structure and Function in Urban Forests

Zhou,

Sun,

et al. 2024

Microorganisms

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Urban forest soil is often disturbed by frequent human activity. Organic mulching is effective for improving soil quality; however, the effects of organic mulching on soil bacterial communities in urban forests are still largely unexplored. This study evaluated how organic mulching changed the urban forest soil bacterial community through an incubation experiment. Four treatments were applied: (1) no organic mulch (CK); (2) wood chips alone (5 g, Mw); (3) wood compost alone (5 g, Mc); and (4) wood chips + wood compost (This mulch was divided into two layers, i.e., the upper layer of wood chips (2.5 g) and the lower layer wood compost (2.5 g, Mw+c).) We found significant differences in the soil physicochemical properties under organic mulching after incubation. Overall, organic mulching can alter soil bacterial community structure. Soil alkali-hydrolyzable nitrogen, soil organic carbon, soil total nitrogen, and carbon-nitrogen ratio were the main factors affecting soil microbial community structures. Soil bacterial groups under organic mulching treatments mainly acted on the C and N cycling of functional pathways in soil. This study suggests that organic mulching could maintain the development of soil bacteria, which establishes a theoretical foundation for enhancing the microbiological environment of urban forest soils.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

How Organic Mulching Influences the Soil Bacterial Community Structure and Function in Urban Forests

Zhou,

Sun,

et al. 2024

Microorganisms

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“…Nitrogen is not only one of the most important nutrition sources for plant growth, flowering, and fruiting, but also an essential element of amino acids, protein, chlorophyll, nucleic acids, membrane lipids, ATP, NADH, co-enzymes, etc. [ 47 , 48 ]. PGPRs contain the key enzyme nitrogenase of BNF, with its activity typically regulated by the transcription of the nitrogen fixation gene ( nif ) [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

The Effect of Two Siderophore-Producing Bacillus Strains on the Growth Promotion of Perennial Ryegrass under Cadmium Stress

Wu,

Xie,

et al. 2024

Microorganisms

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Cadmium (Cd) is a highly toxic and cumulative environmental pollutant. Siderophores are heavy metal chelators with high affinity to heavy metals, such as Cd. Ryegrass (Lolium perenne L.) has a potential remediation capacity for soils contaminated by heavy metals. Consequently, using ryegrass alongside beneficial soil microorganisms that produce siderophores may be an effective means to remediate soils contaminated with Cd. In this study, the Bacillus strains WL1210 and CD303, which were previously isolated from the rhizospheres of Nitraria tangutorum in Wulan and Peganum harmala L. in Dachaidan, Qinghai, China, respectively, both arid and sandy environments, were evaluated for heavy metal pollution mitigation. Our quantitative analyses have discerned that the two bacterial strains possess commendable attributes of phosphorus (P) solubilization and potassium (K) dissolution, coupled with the capacity to produce phytohormones. To assess the heavy metal stress resilience of these strains, they were subjected to a cadmium concentration gradient, revealing their incremental growth despite cadmium presence, indicative of a pronounced tolerance threshold. The subsequent phylogenetic analysis, bolstered by robust genomic data from conserved housekeeping genes, including 16S rDNA, gyr B gene sequencing, as well as dnaK and recA, delineated a species-level phylogenetic tree, thereby confirming the strains as Bacillus atrophaeus. Additionally, we identified the types of iron-carrier-producing strains as catechol (WL1210) and carboxylic acid ferrophilin (CD303). A genomic analysis uncovered functional genes in strain CD303 associated with plant growth and iron carrier biosynthesis, such as fnr and iscA. Ryegrass seed germination assays, alongside morphological and physiological evaluations under diverse heavy metal stress, underscored the strains’ potential to enhance ryegrass growth under high cadmium stress when treated with bacterial suspensions. This insight probes the strains’ utility in leveraging alpine microbial resources and promoting ryegrass proliferation.

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Metagenomic insights into carbon and nitrogen cycling in the water-land transition zone of inland alkaline wetlands

Gao,

Xu,

Zhang

et al. 2024

Science of The Total Environment

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Mulches assist degraded soil recovery via stimulating biogeochemical cycling: metagenomic analysis

Cited by 3 publications

References 58 publications

How Organic Mulching Influences the Soil Bacterial Community Structure and Function in Urban Forests

How Organic Mulching Influences the Soil Bacterial Community Structure and Function in Urban Forests

The Effect of Two Siderophore-Producing Bacillus Strains on the Growth Promotion of Perennial Ryegrass under Cadmium Stress

Metagenomic insights into carbon and nitrogen cycling in the water-land transition zone of inland alkaline wetlands

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