Activated biochar alters activities of carbon and nitrogen acquiring soil enzymes

Ameur, Dominik; Zehetner, Franz; Johnen, Simone; Jöchlinger, Lisa; Pardeller, Georg; Wimmer, Bernhard; Rosner, Franz; Faber, Florian; Dersch, Georg; Zechmeister‐Boltenstern, Sophie; Mentler, Axel; Soja, Gerhard; Keiblinger, Katharina M.

doi:10.1016/j.pedobi.2018.06.001

Cited by 35 publications

(21 citation statements)

References 74 publications

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“…Soil bacteria ecological system can be directly or indirectly involved in the degradation, migra-tion and transformation process of biochar added in soil (Khodadad et al 2011). Biochar can also influence the community structure and abundance of soil bacteria and regulate the interaction of soil environmental factors and microorganisms, and improve the soil microbial ecosystem (Ameur et al 2018). Kolton et al (2011) found that the addition of 3% citrus biochar to sandy soil increased the abundance of Bacteroidetes and reduced the abundance of Proteobacteria.…”

Section: Original Papermentioning

confidence: 99%

“…CK -0.0%; CT1 -0.8%; CT2 -2.0%; CT3 -4% of biochar addition in the purple soil. Values are means ± standard error; different letters indicate significant differences among treatments at P < 0.05 by Duncan's multiple range test Plant, Soil and Environment, 67, 2021 (3): 121-129 Original Paper https://doi.org/10.17221/390/2020-PSE available potassium, etc., which are closely related to bacterial community structure (Ameur et al 2018). Ding et al (2013) showed that available soil phosphorus and available potassium had a great influence on the soil bacterial community.…”

Section: Original Papermentioning

confidence: 99%

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Effects of biochar additions on the soil chemical properties, bacterial community structure and rape growth in an acid purple soil

Li¹,

Li²,

Xu³

et al. 2021

Plant Soil Environ.

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Biochar is considered as a universal conditioner to improve soil quality, but its effects of different addition rates on soil properties, bacterial community structure and plant growth are still unclear, particularly in the typical acid purple soil in the southwest of China. In this study, 110 days of rape growth pot experiment under the application rate of 0.0% rice husk biochar (CK), 0.8% (CT1), 2.0% (CT2) and 4.0% (CT3) to the acid purple soil. Results showed that all biochar additions improved soil pH, soil organic carbon (SOC), total phosphorus, available phosphorus, available potassium concentrations in the acid purple soil. The activity of both invertase and catalase, not urease, was significantly increased with the increasing of biochar addition rates. The 16s-gene sequencing results showed that the Chao1 index was increased only under CT3, and the Shannon index was increased after all biochar applications. Furthermore, biochar increased the relative abundance of bacteria that play important roles in soil carbon and nitrogen cycles, SOC decomposition, plant diseases control and growth. The plant height and biomass production of rapes were increased under the low biochar level (CT1), but not under the higher rates of CT2 and CT3. These results demonstrated that biochar, as a soil conditioner to the acid purple soil, could increase soil pH value, SOC, available phosphorus and potassium and affect carbon and nitrogen cycles related to bacterial communities for promoting plant performance under low application rate.

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Section: Original Papermentioning

confidence: 99%

Section: Original Papermentioning

confidence: 99%

Effects of biochar additions on the soil chemical properties, bacterial community structure and rape growth in an acid purple soil

Li¹,

Li²,

Xu³

et al. 2021

Plant Soil Environ.

View full text Add to dashboard Cite

show abstract

“…Maturation involves surface oxidation [49,50], sorption of soil organic matter rich in oxygen-containing groups [51,52] and increase its surface area while decreasing the pore diameter, relative to fresh biochar [53]. Another possible cause for the different performances of the New vs. Old plots might be related to the initial water repellency characteristics of biochar [54,55], which change with aging [56,57]. For the tested soil, biochar contact to organic acids and other chemical soil components could have caused the aging and decreasing of the hydrophobicity, as reported by previous studies at similar soils [56].…”

Section: Measured Swc and Transformationmentioning

confidence: 99%

“…Another possible cause for the different performances of the New vs. Old plots might be related to the initial water repellency characteristics of biochar [54,55], which change with aging [56,57]. For the tested soil, biochar contact to organic acids and other chemical soil components could have caused the aging and decreasing of the hydrophobicity, as reported by previous studies at similar soils [56]. However, given the short temporal differences between Old vs. New in our study, it is unclear how much of the differences can be truly explained as being due to maturation.…”

Section: Measured Swc and Transformationmentioning

confidence: 99%

Effect of Biochar Application Rates on the Hydraulic Properties of an Agricultural-Use Boreal Podzol

et al. 2019

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Boreal agriculture struggles with soils of lower agronomic value, most of which are sandy with a low water holding capacity (WHC) and prone to nutrient leaching. Biochar amendments are associated with positive effects on soil hydraulic properties and enhanced nutrient retention. However, these effects are strongly related to feedstock type and pyrolysis parameters and depend on biochar application rates and soil types. While biochar could increase the productivity of boreal agriculture by improving water and nutrient use efficiency, little is known about its effects on hydraulic processes in podzol. In this study, we investigated the effects of biochar rates (10, 20, 40, 80 Mg carbon ha−1) and maturity on soil hydrology for an agriculturally used Podzol in Labrador, Canada. The in-situ soil water content (SWC) and weather data over an entire growing season were analysed. Hydrus 1D simulations were used to estimate changes in water fluxes. SWC showed clear differentiation among storage parameters (i.e., initial, peak and final SWC) and kinetic parameters (i.e., rate of SWC change). Storage parameters and soil wetting and drying rates were significantly affected by biochar rates and its maturity. The magnitude of the changes in SWC after either wetting or drying events was statistically not affected by the biochar rate. This confirms that biochar mostly affected the WHC. Nevertheless, reductions in cumulative lower boundary fluxes were directly related to biochar incorporation rates. Overall, biochar had positive effects on hydrological properties. The biochar rate of 40 Mg C ha−1 was the most beneficial to agriculturally relevant hydraulic conditions for the tested Podzol.

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“…Biochar's longevity in the soil makes it a useful tool in carbon sequestration, although the long-term impacts on Cu immobilization are not yet fully understood [34,35]. It may be that the initial positive 'priming effect' of BC is transient and may decline or even reverse into a negative effect over time [36][37][38][39][40]. Oxygen-containing surface functional groups increase in numbers as BC is oxidized, potentially causing the initially hydrophobic BC to become more hydrophilic [20,[41][42][43][44], which may also change the BC's binding capacity for metals and, hence, metal bioavailability over time [5,[45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Temporal Changes in the Efficiency of Biochar- and Compost-Based Amendments on Copper Immobilization in Vineyard Soils

et al. 2019

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Copper (Cu)-based fungicides have been an important tool against disease in viticulture since the 19th century. However, their prolonged use can lead to Cu accumulation in the soil and negatively affect soil microbiology and plant growth. The application of biochar (BC)-based amendments is a promising mitigation strategy, due to BC’s longevity in the soil and its potential to complex Cu. This study investigated temporal changes in the efficiency of various compost- and BC-based amendments to immobilize Cu in a calcareous and a slightly acidic Austrian vineyard soil. The immobilization of both historically accumulated Cu and freshly spiked Cu (250 mg kg−1) was studied. The soils were treated with six combinations of amendments containing compost and BC, with and without surface modification, as well as an additional lime treatment for the acidic soil. After treatment, the soils were incubated for 6 weeks and 3 years, after which the 0.01 M CaCl2-extractable Cu was measured. The amendments were not effective in reducing the mobility of the historically accumulated Cu in the calcareous soil, with pure compost doubling the soluble Cu. Pure wood-chip BC was the only organic amendment that led to a reduction (by 20%) of soluble Cu after 6 weeks in the acidic soil; however, after 3 years, the same amendment reduced soluble Cu by 40% and all other tested amendments were also effective in reducing the mobility of the historically accumulated Cu. The lime treatment achieved the greatest reduction in Cu mobility (56%). Freshly spiked Cu was strongly immobilized in both unamended soils, with 0.06% and 0.39% extractable after 6 weeks in the calcareous and slightly acidic soil, respectively. The amendments did not effectuate additional Cu immobilization in the calcareous soil, but in the acidic soil, the soluble Cu was further reduced to between 25% and 50% of the unamended control by the tested organic amendments and to 6% by the lime treatment after 6 weeks of incubation. Overall, the acidic soil exhibited a stronger response to the amendments than did the calcareous soil, suggesting the amendments’ effect on the soil pH was an important factor for Cu immobilization in this study. These results show the importance of developing site-specific remediation strategies for Cu accumulation in agricultural soils.

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Activated biochar alters activities of carbon and nitrogen acquiring soil enzymes

Cited by 35 publications

References 74 publications

Effects of biochar additions on the soil chemical properties, bacterial community structure and rape growth in an acid purple soil

Effects of biochar additions on the soil chemical properties, bacterial community structure and rape growth in an acid purple soil

Effect of Biochar Application Rates on the Hydraulic Properties of an Agricultural-Use Boreal Podzol

Temporal Changes in the Efficiency of Biochar- and Compost-Based Amendments on Copper Immobilization in Vineyard Soils

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