Biochar amendment changes temperature sensitivity of soil respiration and composition of microbial communities 3 years after incorporation in an organic carbon-poor dry cropland soil

Chen, Junhui; Sun, Xuan; Zhang, Xuhui; Liu, Xiaoyu; Bian, Rongjun; Li, Lianqing; Cheng, Kun; Zheng, Jufeng; Pan, Genxing

doi:10.1007/s00374-017-1253-6

Cited by 86 publications

(45 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absence of a significant modification of the Q after the application of biochar (Figure 1, Table 2) was coherent with what was observed in previous studies with different biochars and application rates [26,37,39]. However, this result is inconsistent with other studies that reported a decrease [40][41][42] or an increase [25,43] to the temperature sensitivity of CO 2 emissions. These contrasting results derives from the complexity of the factors involved.…”

Section: Discussionsupporting

confidence: 83%

Effect of Woodchips Biochar on Sensitivity to Temperature of Soil Greenhouse Gases Emissions

Criscuoli

Ventura

Sperotto

et al. 2019

Forests

View full text Add to dashboard Cite

Research Highlights: Biochar is the carbonaceous product of pyrolysis or the gasification of biomass that is used as soil amendment to improve soil fertility and increase soil carbon stock. Biochar has been shown to increase, decrease, or have no effect on the emissions of greenhouse gases (GHG) from soil, depending on the specific soil and biochar characteristics. However, the temperature sensitivity of these gas emissions in biochar-amended soils is still poorly investigated. Background and Objectives: A pot experiment was set up to investigate the impact of woodchips biochar on the temperature sensitivity of the main GHG (CO2, CH4, and N2O) emissions from soil. Materials and Methods: Nine pots (14 L volume) were filled with soil mixed with biochar at two application rates (0.021 kg of biochar/kg of soil and 0.042 kg of biochar/kg of soil) or with soil alone as the control (three pots per treatment). Pots were incubated in a growth chamber and the emissions of CO2, CH4, and N2O were monitored for two weeks with a cavity ring-down gas analyzer connected to three closed dynamic chambers. The temperature in the chamber increased from 10 °C to 30 °C during the first week and decreased back to 10 °C during the second week, with a daily change of 5 °C. Soil water content was kept at 20% (w/w). Results: Biochar application did not significantly affect the temperature sensitivity of CO2 and N2O emissions. However, the sensitivity of CH4 uptake from soil significantly decreased by the application of biochar, reducing the CH4 soil consumption compared to the un-amended soil, especially at high soil temperatures. Basal CO2 respiration at 10 °C was significantly higher in the highest biochar application rate compared to the control soil. Conclusions: These results confirmed that the magnitude and direction of the influence of biochar on temperature sensitivity of GHG emissions depend on the specific GHG considered. The biochar tested in this study did not affect soil N2O emission and only marginally affected CO2 emission in a wide range of soil temperatures. However, it showed a negative impact on soil CH4 uptake, particularly at a high temperature, having important implications in a future warmer climate scenario and at higher application rates.

show abstract

Section: Discussionsupporting

confidence: 83%

Effect of Woodchips Biochar on Sensitivity to Temperature of Soil Greenhouse Gases Emissions

Criscuoli

Ventura

Sperotto

et al. 2019

Forests

View full text Add to dashboard Cite

show abstract

“…A lower q CO 2 was observed in biochar‐amended soil compared to the no biochar‐amended soil (Table ). It suggested that biochar amendment could enhance the C utilization efficiency of microorganisms (Chen et al, ). This finding was also supported by Zheng et al (), who reported that biochar decreased the microbial metabolic quotient 4 years after a single incorporation in a slightly acidic rice paddy.…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, Watzinger et al () revealed that biochar addition significantly increased Gram‐negative bacteria and actinomycetes from temperate soil in short‐term incubation using 13 C‐PLFA. Chen et al () demonstrated that 3 year biochar soil amendment reduced the relative abundance of three dominant bacterial phyla related to C cycling, while increasing the abundance of Ascomycota, a key fungal community, and reducing the dependence of soil respiration on temperature. By contrast, a 6 year field experiment conducted by Tian et al () indicated that microbial metabolic activity strongly increased due to biochar amendment, but it did not change microbial community structure in paddy soil.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…The lower C mineralization in soils after long-term BA has been reported in other studies. For example, Chen et al (2018) found that 3 years after biochar addition to soils at 20 and 40 t/ha, soil basal respiration rates were significantly decreased by 12% and 20% during a 31-day incubation. Similarly, Liu et al (2019) reported that a soil amended with biochar 6 years earlier had the total C mineralization decreased by 38.8% compared with that of the biochar-free Control during a 64-day incubation.…”

Section: Soil C Sequestration Potential: Straw Incorporation Versusmentioning

confidence: 99%

Greater microbial carbon use efficiency and carbon sequestration in soils: Amendment of biochar versus crop straws

Liu

et al. 2020

GCB Bioenergy

Self Cite

View full text Add to dashboard Cite

show abstract

Biochar amendment changes temperature sensitivity of soil respiration and composition of microbial communities 3 years after incorporation in an organic carbon-poor dry cropland soil

Cited by 86 publications

References 78 publications

Effect of Woodchips Biochar on Sensitivity to Temperature of Soil Greenhouse Gases Emissions

Effect of Woodchips Biochar on Sensitivity to Temperature of Soil Greenhouse Gases Emissions

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

Greater microbial carbon use efficiency and carbon sequestration in soils: Amendment of biochar versus crop straws

Contact Info

Product

Resources

About