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《Journal of Agro-Environment Science》 2011-10
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The Structural Characteristics of Biochar and Its Effects on Soil Available Nutrients and Humus Composition

ZHOU Gui-yu,DOU Sen*,LIU Shi-jie(College of Resources and Environmental Science,Jilin Agriculture University,Changchun 130118,China)  
Biomass-derived charcoal,also named biochar,has the characteristics of high stability against decay and high capability of adsorption,so it can influence the environment through interaction with climate and geology.There is significant difference in structural characteristics of biochar which is obtained from wood and agricultural residues by means of different procedures.As one possible source of the components with high aromatic structure in soil humus,biochar is of great importance in improving soil fertility,and in maintaining the balance of soil ecosystem.The aim of the research is to investigate the structural characteristics of biochar and the effects of it when applied to soil on available nutrients and humus composition.The results showed that there was great difference between chemical structures of biochar which was produced by different biomass.Aliphatic property of maize straw-derived biochar was stronger than that of pine-derived biochar and commercial black carbon;Aromaticity and thermal stability was on the contrary;Properties of pine-derived biochar was just intermediate.Biochar could influence the soil properties,after being added to soil and incubated for 45 days,and the content of soil organic matter,humic acid and fulvic acid were more or less increased to different levels.However,humification degree decreased with the increase of incubated time.The application of biochar could also increase the content of available nutrients,especially the content of phosphorus,alcium and magnesium.The decreased ΔlgK of humic acid had a positive impact on the long-term preservation of soil organic carbon.
【Fund】: 973项目(2011CB100503);; 国家自然基金(40871107 40971141);; 中国科学院知识创新项目(KZCX2-YW-Q1-07)
【CateGory Index】: S158
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