Response of microbial community structure and function to short-term biochar amendment in an intensively managed bamboo (Phyllostachys praecox) plantation soil: Effect of particle size and addition rate

Chen, Junhui; Li, Songhao; Liang, Chenfei; Xu, Qiufang; Li, Yongchun; Qin, Hua; Fuhrmann, Jeffry J.

doi:10.1016/j.scitotenv.2016.08.190

Cited by 162 publications

(54 citation statements)

References 57 publications

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“…More labile C fractions (containing higher H/C) existed in the fresh biochar, especially for biochar that was made at lower pyrolysis temperatures (Bian et al, ; Liu et al, ; Mukherjee, Zimmerman, & Harris, ). They can be utilized more easily by soil microorganisms over short periods (Chen et al, ). Consequently, a significant increase in CO 2 release was found over short time, because an abundance of nutrients contained in the biochar boosted microbial growth and reproduction (Figure a) and accelerated organic matter decomposition (Sheng & Zhu, ; Singh, Cowie, & Smernik, ).…”

Section: Discussionmentioning

confidence: 99%

“…Soil microbes play a key role in soil organic matter stabilization and nutrient cycling (Chen, Chen, et al, ; Watzinger et al, ). The effects of biochar on soil microbial community composition have been investigated using high‐throughput sequencing or phospholipid fatty acid (PLFA) technology (Ameloot et al, ; Chen et al, ; Sheng & Zhu, ; Zhou et al, ). Xu et al () reported that high‐throughput sequencing results in increased α‐diversity significantly and the relative abundances of Flammeovirgaceae and Chitinophagaceae related to C cycling after 45 days following biochar addition in a pot trial.…”

Section: Introductionmentioning

confidence: 99%

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The responses of soil organic carbon mineralization and microbial communities to fresh and aged biochar soil amendments

et al. 2019

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While biochar soil amendment has been widely proposed as a soil organic carbon (SOC) sequestration strategy to mitigate detrimental climate changes in global agriculture, the SOC sequestration was still not clearly understood for the different effects of fresh and aged biochar on SOC mineralization. In the present study of a two‐factorial experiment, topsoil samples from a rice paddy were laboratory‐incubated with and without fresh or aged biochar pyrolyzed of wheat residue and with and without crop residue‐derived dissolved organic matter (CRM) for monitoring soil organic matter decomposition under controlled conditions. The six treatments included soil with no biochar, with fresh biochar and with aged biochar treated with CRM, respectively. For fresh biochar treatment, the topsoil of a same rice paddy was amended with wheat biochar directly from a pyrolysis wheat straw, the soil with aged biochar was collected from the same soil 6 years following a single amendment of same biochar. Total CO2 emission from the soil was monitored over a 64 day time span of laboratory incubation, while microbial biomass carbon and phospholipid fatty acid (PLFA) were determined at the end of incubation period. Without CRM, total organic carbon mineralization was significantly decreased by 38.8% with aged biochar but increased by 28.9% with fresh biochar, compared to no biochar. With CRM, however, the significantly highest net carbon mineralization occurred in the soil without biochar compared to the biochar‐amended soil. Compared to aged biochar, fresh biochar addition significantly increased the total PLFA concentration by 20.3%–33.8% and altered the microbial community structure by increasing 17:1ω8c (Gram‐negative bacteria) and i17:0 (Gram‐positive bacteria) mole percentages and by decreasing the ratio of fungi/bacteria. Furthermore, biochar amendment significantly lowered the metabolic quotient of SOC decomposition, thereby becoming greater with aged biochar than with fresh biochar. The finding here suggests that biochar amendment could improve carbon utilization efficiency by soil microbial community and SOC sequestration potential in paddy soil can be enhanced by the presence of biochar in soil over the long run.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The responses of soil organic carbon mineralization and microbial communities to fresh and aged biochar soil amendments

et al. 2019

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“…Furthermore, Luo et al (2017) found an increased microbial population in a sandy loam soil due to the application of bamboo stick biochar. The high pH, EC, and available K + in biochar improved the soil properties required for microbial colonization (Chen et al 2017a).…”

Section: Biochar As a Growth Promoter For Soil Biotamentioning

confidence: 99%

Response of microbial communities to biochar-amended soils: a critical review

Palansooriya

Wong

Hashimoto

et al. 2019

Biochar

553

160

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Application of biochar to soils changes soil physicochemical properties and stimulates the activities of soil microorganisms that influence soil quality and plant performance. Studying the response of soil microbial communities to biochar amendments is important for better understanding interactions of biochar with soil, as well as plants. However, the effect of biochar on soil microorganisms has received less attention than its influences on soil physicochemical properties. In this review, the following key questions are discussed: (i) how does biochar affect soil microbial activities, in particular soil carbon (C) mineralization, nutrient cycling, and enzyme activities? (ii) how do microorganisms respond to biochar amendment in contaminated soils? and (iii) what is the role of biochar as a growth promoter for soil microorganisms? Many studies have demonstrated that biochar-soil application enhances the soil microbial biomass with substantial changes in microbial community composition. Biochar amendment changes microbial habitats, directly or indirectly affects microbial metabolic activities, and modifies the soil microbial community in terms of their diversity and abundance. However, chemical properties of biochar, (especially pH and nutrient content), and physical properties such as pore size, pore volume, and specific surface area play significant roles in determining the efficacy of biochar on microbial performance as biochar provides suitable habitats for microorganisms. The mode of action of biochar leading to stimulation of microbial activities is complex and is influenced by the nature of biochar as well as soil conditions.

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“…Due to biochar application, microbial CUE was increased by 0.05, 0.09 and 0.12 units in Cd, Pb and Cd + Pb spiked soils, respectively. This indicated that a higher portion of assimilated carbon was incorporated into the microorganisms rather than it was released as CO2 (Lehmann et al, 2011;Chen et al, 2017).…”

Section: Microbial Carbon Use Efficiency In Soilmentioning

confidence: 99%

Biochar modulates heavy metal toxicity and improves microbial carbon use efficiency in soil

Seshadri

Sarkar

et al. 2018

Science of The Total Environment

204

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Soil organic carbon is essential to improve soil fertility and ecosystem functioning. Soil microorganisms contribute significantly to the carbon transformation and immobilisation processes. However, microorganisms are sensitive to environmental stresses such as heavy metals. Applying amendments, such as biochar, to contaminated soils can alleviate the metal toxicity and add carbon inputs. In this study, Cd and Pb spiked soils treated with macadamia nutshell biochar (5% w/w) were monitored during a 49days incubation period. Microbial phospholipid fatty acids (PLFAs) were extracted and analysed as biomarkers in order to identify the microbial community composition. Soil properties, metal bioavailability, microbial respiration, and microbial biomass carbon were measured after the incubation period. Microbial carbon use efficiency (CUE) was calculated from the ratio of carbon incorporated into microbial biomass to the carbon mineralised. Total PLFA concentration decreased to a greater extent in metal contaminated soils than uncontaminated soils. Microbial CUE also decreased due to metal toxicity. However, biochar addition alleviated the metal toxicity, and increased total PLFA concentration. Both microbial respiration and biomass carbon increased due to biochar application, and CUE was significantly (p<0.01) higher in biochar treated soils than untreated soils. Heavy metals reduced the microbial carbon sequestration in contaminated soils by negatively influencing the CUE. The improvement of CUE through biochar addition in the contaminated soils could be attributed to the decrease in metal bioavailability, thereby mitigating the biotoxicity to soil microorganisms.

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Response of microbial community structure and function to short-term biochar amendment in an intensively managed bamboo (Phyllostachys praecox) plantation soil: Effect of particle size and addition rate

Cited by 162 publications

References 57 publications

The responses of soil organic carbon mineralization and microbial communities to fresh and aged biochar soil amendments

The responses of soil organic carbon mineralization and microbial communities to fresh and aged biochar soil amendments

Response of microbial communities to biochar-amended soils: a critical review

Biochar modulates heavy metal toxicity and improves microbial carbon use efficiency in soil

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