Effects of biochar on the acidity of a loamy clay soil under different incubation conditions

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• 作者：Rudong Zhao ; Diwei Jiang ; Neil Coles ; Jiaping Wu
• 关键词：Biochar ; Management practice ; Soil acidity amendment ; Ventilation condition
• 刊名：Journal of Soils and Sediments
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：15
• 期：9
• 页码：1919-1926
• 全文大小：337 KB
• 参考文献：ASTM (2007) ASTM D1762-84 standard test method for chemical analysis of wood charcoal. ASTM Int, West Conshohocken
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• 作者单位：Rudong Zhao (1)
  Diwei Jiang (2)
  Neil Coles (3)
  Jiaping Wu (1)
  
  1. Institute of Islands and Coastal Ecosystems, Zhejiang University, Hangzhou, 310058, China
  2. College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310058, China
  3. Institute of Agriculture, The University of Western Australia, Perth, 6009, WA, Australia
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Soil Science and Conservation
  Environment
  Environmental Physics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7480

文摘

Purpose Biochar can be used to amend acidic soils, and the effectiveness of this amendment may be varied under different ventilation conditions. This study aimed to clarify the effect the incubation method (either ventilation or sealed conditions) had on the capacity of biochar to amend acidity of a typically acidic agricultural soil in hilly red soil region of southern China. Materials and methods Biochars pyrolyzed from the bark (PB) and the trunk (PT) of Pinus massoniana, a widely distributed tree species in the region, were prepared. Sealed treatments consisted of 100?g soil--?g?PB (PBS), 100?g soil--?g PT (PTS), and 100?g soil only (CKS). Ventilated treatments were conducted correspondingly (PBV, PTV, and CKV). During the 68-day incubation, soil pH was measured periodically. Results and discussion Both biochars, PB and PT, amended the soil acidity significantly, e.g., increased soil pH and exchangeable cations, and decreased soil exchangeable acidity and exchangeable aluminum. After incubation, soil pH in PBS and PTS increased by 0.30 and 0.16?units, respectively, while soil pH in PBV and PTV increased by 0.25 and 0.11?units, respectively. Moreover, more positive effects on soil exchangeable acidity and nitrate nitrogen were also observed in sealed rather than in ventilated treatments. Conclusions The results suggested that waste of P. massoniana can be pyrolyzed for soil acidity amendment in this region. While the effectiveness of biochar on acidity amendment of the soil can be influenced by the aeration conditions, other local environmental conditions may be involved and should also be considered when assessing soil amendments.