Aeration increases soil bacterial diversity and nutrient transformation under mulching-induced hypoxic conditions

Qian, Zhuangzhuang; Zhuang, Shunyao; Gao, Jichao; Tang, Luozhong; Harindintwali, Jean Damascene; Wang, Fang

doi:10.1016/j.scitotenv.2022.153017

Cited by 36 publications

(19 citation statements)

References 52 publications

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“…The V4–V5 regions of the bacterial 16S ribosomal RNA genes were amplified by PCR using primers 515F (5′‐GTGCCAGCMGCCGCGG‐3′) and 907R (5′‐CCGTCAATTCMTTTRAGTTT‐3′). In accordance with our previous study, we conducted PCR amplification as well as high‐throughput sequencing (Qian et al, 2022). Raw reads were submitted to the NCBI Sequence Read Archive database (ID: PRJNA788744).…”

Section: Methodsmentioning

confidence: 85%

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Soil nutrient cycling and bacterial community structure in response to various green manures in a successive Eucalyptus (Eucalyptus urophylla × Eucalyptus grandis) plantation

et al. 2022

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Successive cultivation of short‐rotation eucalyptus plantations often cause serious decline in soil quality in China, which limits sustainable production. Green manure application is a potential strategy for improving soil fertility while ensuring ecological sustainability. Nevertheless, the impacts of various green manure species on soil quality in eucalyptus plantations remain unclear. In the present study, we investigated how soil nutrient cycling and bacterial communities respond to various green manure species (Legume and Gramineae), namely Tephrosia candida, Sesbania cannabina, Lolium perenne, and Pennisetum purpureum (PP). A batch experiment was conducted using eucalyptus plantation (E. urophylla × E. grandis) soil mixed with green manures for 60 days. According to the results, the PP treatment had the highest soil respiration rate among the five treatments, suggesting that PP application had the optimal effects on soil organic matter and residue decomposition. Furthermore, applying green manure increased bacterial diversity significantly when compared to CK (soil without green manure). Among the treatments, the PP treatment increased bacterial functional groups associated with the nitrogen cycle significantly, which result in rapid nutrient turnover. The rapid decomposition under PP may be responsible for the structural and functional changes in bacterial communities. Overall, the PP green manure is the optimal amendment for rapid nutrient supply in degraded eucalyptus plantations over the short term. Our results could facilitate sustainable management of successive eucalyptus plantations; nevertheless, extra investigations are needed to verify the long‐term impacts of PP green manure in the field.

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Section: Methodsmentioning

confidence: 85%

“…In accordance with our previous study, we conducted PCR amplification as well as high-throughput sequencing (Qian et al, 2022). Raw reads were submitted to the NCBI Sequence Read Archive database (ID: PRJNA788744).…”

Section: Dna Extraction Pcr Amplification and Sequencing Analysismentioning

confidence: 99%

Soil nutrient cycling and bacterial community structure in response to various green manures in a successive Eucalyptus (Eucalyptus urophylla × Eucalyptus grandis) plantation

et al. 2022

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“…Meanwhile, the genera Chujaibacter and Nitrospira were also dominant in chambers O2 and O3, the Nitrospira is known as a nitrification-related bacterium during nitrification process ( Li et al, 2022a ), and Chujaibacter is reported to be positively correlated with Nitrospira ( Sato et al, 2021 ). The presence of genera Bradyrhizobium , Mesorhizobium , Dokdonella , Ferruginibacter , Holophaga , and Hyphomicrobium could be related to the denitrification processes or organic degradation ( Chen et al, 2021 ; Liang et al, 2021b ; Wang et al, 2021b ; Qian et al, 2022 ; Li et al, 2022b ), this is helpful in removing COD and nitrate in the chambers O2 and O3, and the unclassified_f __Comamonadaceae was able to reduce nitrate by using organic carbons ( Zhang et al, 2022 ). In general, the main functions of bacteria in the O2 and O3 chambers may be to get involved in the nitrification process, denitrification process and removal of organic matter, which further verified the removal trend of pollutants in the reactor.…”

Section: Resultsmentioning

confidence: 99%

An efficient anoxic/aerobic/aerobic/anoxic process for domestic sewage treatment: From feasibility to application

et al. 2022

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In this paper, the anoxic/aerobic/aerobic/anoxic (AOOA) process was proposed using fixed biofilms in a continuous plug-flow multi-chamber reactor, and no sludge reflux operation was performed during the 190 days of operation. The reactor volume ratio of 1.5:2:1.5:1 (A/O/O/A) with the dissolved oxygen (DO) concentration of 2 mg L−1 in the aerobic zone was the optimal condition for reactor operation. According to the results obtained from the treatment of real domestic sewage, when the hydraulic retention time (HRT) was 6 h, the effluent of the reactor could meet the discharge standard even in cold conditions (13°C). Specifically, the elemental-sulfur-based autotrophic denitrification (ESAD) process contributed the most to the removal of total inorganic nitrogen (TIN) in the reactor. In addition, the use of vibration method was helpful in removing excess sludge from the biofilms of the reactor. Overall, the AOOA process is an efficient and convenient method for treating domestic sewage.

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“…The positive feedback on shoot mass caused by microplastic foams and fragments may be linked with their positive effects on soil aeration in the conditioning phase ( Lozano et al, 2021b ), and as consequence, on the soil microbial activity and soil biota present in the feedback phase ( Bronick and Lal, 2005 ). Previous research has observed that soil aeration induced by microplastics increases enzymatic activities, bacterial diversity, and the relative abundance of beneficial soil bacteria associated to nitrification and nitrogen fixation ( Qian et al, 2022 ). Likewise, it has been shown that microplastic foams mixed with soil increase enzymatic activities such as cellobiosidase, β-D-glucosidase, and N-acetylβ-glucosaminidase ( Zhao et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Legacy effect of microplastics on plant–soil feedbacks

Lozano

Rillig

2022

Front. Plant Sci.

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Microplastics affect plants and soil biota and the processes they drive. However, the legacy effect of microplastics on plant–soil feedbacks is still unknown. To address this, we used soil conditioned from a previous experiment, where Daucus carota grew with 12 different microplastic types (conditioning phase). Here, we extracted soil inoculum from those 12 soils and grew during 4 weeks a native D. carota and a range-expanding plant species Calamagrostis epigejos in soils amended with this inoculum (feedback phase). At harvest, plant biomass and root morphological traits were measured. Films led to positive feedback on shoot mass (higher mass with inoculum from soil conditioned with microplastics than with inoculum from control soil). Films may decrease soil water content in the conditioning phase, potentially reducing the abundance of harmful soil biota, which, with films also promoting mutualist abundance, microbial activity and carbon mineralization, would positively affect plant growth in the feedback phase. Foams and fragments caused positive feedback on shoot mass likely via positive effects on soil aeration in the conditioning phase, which could have increased mutualistic biota and soil enzymatic activity, promoting plant growth. By contrast, fibers caused negative feedback on root mass as this microplastic may have increased soil water content in the conditioning phase, promoting the abundance of soil pathogens with negative consequences for root mass. Microplastics had a legacy effect on root traits: D. carota had thicker roots probably for promoting mycorrhizal associations, while C. epigejos had reduced root diameter probably for diminishing pathogenic infection. Microplastic legacy on soil can be positive or negative depending on the plant species identity and may affect plant biomass primarily via root traits. This legacy may contribute to the competitive success of range-expanding species via positive effects on root mass (foams) and on shoot mass (PET films). Overall, microplastics depending on their shape and polymer type, affect plant–soil feedbacks.

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Aeration increases soil bacterial diversity and nutrient transformation under mulching-induced hypoxic conditions

Cited by 36 publications

References 52 publications

Soil nutrient cycling and bacterial community structure in response to various green manures in a successive Eucalyptus (Eucalyptus urophylla × Eucalyptus grandis) plantation

Soil nutrient cycling and bacterial community structure in response to various green manures in a successive Eucalyptus (Eucalyptus urophylla × Eucalyptus grandis) plantation

An efficient anoxic/aerobic/aerobic/anoxic process for domestic sewage treatment: From feasibility to application

Legacy effect of microplastics on plant–soil feedbacks

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