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《Earth and Environment》 2012-01
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The Application of Biochar to Improving Agricultural Production and Pollution Abatement

YANG Fang1,2,LEE Xin-qing1,WANG Bing1, CHENG Jian-zhong1(1.The State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry, Chinese Academy of Sciences,Guiyang 550002,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
As an important carbon sequestration,soil amendment and efficient pollutant absorbent,biochar has attracted extensive interests of many scientists.Based on literatures about the effects on improving agricultural production and pollution abatement in recent years,we summarized some regulations and put forward some prospects of future research.The statements are presented as follows.Firstly,biochar exhibits a large internal surface area and a high degree of porosity;added biochar could enhance soil water holding capacity and the ability of soils to retain cations in a plant-available form,assist in the retention of elements in soil and improve soil structure.In addition,the biochar has abundant nutrient elements and provides a slow release source of nutrient elements.Therefore,application of biochar can improve soil fertility and increase crop yield.Secondly,the huge adsorbable ability of biochar could reduce activity of heavy metals and organic pollutants in the soil and sewage,playing a role in reducing the concentrations of pollutants.Therefore,biochar has huge potential in increasing crop production and reducing the concentration of the pollutants.Up to now,however,many mechanisms of biochar are not yet understood well enough.More researches are needs to be carried out to investigate the characteristics of different kinds of biochar and the inner chemical and structural changes in the process of pyrolysis.Besides,more field plots should be made to explore the advantages and disadvantages of biochar.Consequently,researchers should try their best to use local main animal and plant wastes to produce biochar to increase crop production and reduce the concentrations of the pollutants in combination with local circumstances.Thirdly,more long-term experiments should be conducted to find biochar and production conditions suitable for local application.In addition,research on the application of biochar in remote and poor soil areas,such as Tibet and Sinkiang,should be enhanced,making the local soil be used better,so as to improve the livelyhood of the local people.Finally,the local government and related departments should increase support to the biochar research program,making biochar be widely used and become more benefit to local people.
【Fund】: 国家自然科学基金项目(41021062和40872212);; 贵州省农业攻关计划项目(黔科合NY字[2011]3079号);; 中国科学院战略性先导科技专项(XDA05070400);; 院地合作项目资助
【CateGory Index】: S143;X712;X53
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