Journal ArticleDOI
Mechanisms of biochar decreasing methane emission from Chinese paddy soils
TLDR
In this article, the authors studied CH 4 emission, methanogenic archaeal, as well as methanotrophic proteobacterial communities, from microcosms derived from two paddy soils, Inceptisol and Ultisol.Abstract:
Paddy fields are one of the largest anthropogenic sources of global CH 4 emission. A decrease in paddy CH 4 emission can contribute significantly towards the control of global warming. Recent studies have demonstrated that the application of biochar in paddy soils has such a capability, but its underlying mechanism has yet to be elucidated. In this investigation, we studied CH 4 emission, methanogenic archaeal, as well as methanotrophic proteobacterial communities, from microcosms derived from two paddy soils, Inceptisol and Ultisol. Both soils were amended with biochar at different pyrolysis temperatures (300 °C, 400 °C and 500 °C) at field condition. The soil CH 4 flux was monitored across whole rice season in 2010; the functional guilds communities were analyzed by PCR–DGGE and real-time quantitative PCR (qPCR). It is found that paddy CH 4 emissions significantly decreased under biochar amendments, which, interestingly, didn't result from the inhibition of methanogenic archaeal growth. qPCR further revealed that biochar amendments (1) increased methanotrophic proteobacterial abundances significantly, and (2) decreased the ratios of methanogenic to methanotrophic abundances greatly. These results shed insight on the underlying mechanism of how biochar decreases paddy CH 4 emission. This knowledge can be applied to develop a more effective greenhouse gas mitigation process for paddy fields.read more
Citations
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Journal ArticleDOI
Insight into Multiple and Multilevel Structures of Biochars and Their Potential Environmental Applications: A Critical Review
TL;DR: In this review, multiple and multilevel structures of biochars are interpreted based on their elemental compositions, phase components, surface properties, and molecular structures to design a "smart" biochar for environmentally sustainable applications.
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Biochar properties and eco-friendly applications for climate change mitigation, waste management, and wastewater treatment: A review
TL;DR: In this paper, a review of the principles and concepts involved in biochar production, the factors that affect biochar quality, as well as the applications of biochar can be found.
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Sewage sludge biochar influence upon rice (Oryza sativa L) yield, metal bioaccumulation and greenhouse gas emissions from acidic paddy soil
TL;DR: SSBC can be beneficial in rice paddy soil but the actual associated benefits will depend on site-specific conditions and source of SS; long-term effects remain a further unknown.
Journal ArticleDOI
Characteristics and Applications of Biochar for Environmental Remediation: A Review
TL;DR: Biochar is a stabilized, recalcitrant organic carbon compound, created when biomass is heated to temperatures usually between 300 and 1000°C, under low (preferably zero) oxygen concentrations as mentioned in this paper.
Journal ArticleDOI
Biochar for crop production: potential benefits and risks
Mubshar Hussain,Muhammad Farooq,Muhammad Farooq,Muhammad Farooq,Ahmad Nawaz,Ahmad Nawaz,Abdullah M. Al-Sadi,Zakaria M. Solaiman,Salem S. Alghamdi,U. E. Ammara,Yong Sik Ok,Kadambot H. M. Siddique +11 more
TL;DR: In this paper, the potential role of biochar for improving crop yields and decreasing the emission of greenhouse gases, along with the potential risks involved with biochar application and strategies to avoid these risks.
References
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Journal ArticleDOI
MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) Software Version 4.0
TL;DR: Version 4 of MEGA software expands on the existing facilities for editing DNA sequence data from autosequencers, mining Web-databases, performing automatic and manual sequence alignment, analyzing sequence alignments to estimate evolutionary distances, inferring phylogenetic trees, and testing evolutionary hypotheses.
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Ameliorating physical and chemical properties of highly weathered soils in the tropics with charcoal – a review
TL;DR: In this paper, the authors reviewed the available information about the physical and chemical properties of charcoal as affected by different combustion procedures, and the effects of its application in agricultural fields on nutrient retention and crop production.
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A handful of carbon
TL;DR: On the climate change mitigation front, the incorporation of ‘biochar’ into the soil is one idea gaining support, and Johannes Lehmann argues that trapping biomass carbon in this way is more effective than storing it in plants and trees that will one day decompose.
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Bio-energy in the black
TL;DR: The precise half-life of biochar is still disputed, and this will have important implications for the value of the technology, particularly in carbon trading as mentioned in this paper, and it is not clear under what conditions, and over what period of time, biochar develops its adsorbing properties.