| 农业废弃物及其制备的生物质炭对酸性土壤的改良作用 |
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| 作者姓名： | YUAN Jin-Hu XU Ren-Kou WANG Ning LI Jiu-Yu |
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| 作者单位： | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Graduate University of Chinese Academy of Sciences, Beijing 100049 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
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| 基金项目： | Supported by the National Key Technology R&D Program of China (No.2009BADC6B02); the National Natural Science Foundation of China (No.40971135) |
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| 摘 要： | The liming potential of some crop residues and their biochars on an acid Ultisol was investigated using incubation experiments. Rice hulls showed greater liming potential than rice hull biochar, while soybean and pea straws had less liming potential than their biochars. Due to their higher alkalinity, biochars from legume materials increased soil pH much compared to biochars from non-legume materials. The alkalinity of biochars was a key factor aflecting their liming potential, and the greater alkalinity of biochars led to greater reductions in soil acidity. The incorporation of biochars decreased soil exchangeable acidity and increased soil exchangeable base cations and base saturation, thus improving soil fertility.
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| 关 键 词： | alkalinity exchangeable base cations inorganic N liming potential soil acidity |
Amendment of acid soils with crop residues and biochars |
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| YUAN Jin-Hu,XU Ren-Kou,WANG Ning,LI Jiu-Yu.Amendment of acid soils with crop residues and biochars[J].Pedosphere,2011,21(3):302-308. |
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| Authors: | YUAN Jin-Hu XU Ren-Kou WANG Ning and LI Jiu-Yu |
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| Institution: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
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| Abstract: | The liming potential of some crop residues and their biochars on an acid Ultisol were investigated using incubation experiments. Rice hulls showed greater liming potential than rice hull biochar, while soybean and pea straws had less liming potential than their biochars. Due to their higher alkalinity, biochars from legume materials increased soil pH much compared to biochars from non-legume materials. The alkalinity of biochars was a key factor affecting their liming potential, and the greater alkalinity of biochars led to greater reductions in soil acidity. The incorporation of biochars decreased soil exchangeable acidity and increased soil exchangeable base cations and base saturation, thus improving soil fertility. |
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| Keywords: | alkalinity exchangeable base cations inorganic N liming potential soil acidity |
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