摘要：

There is increasing demand worldwide for application of biochar from crop residues to croplands as a key countermeasure for enhancing soil C stock and reducing greenhouse gases emission from agriculture. This paper reviewes the basic properies and the decomposition stability of biochar,the benefial effects on soil reclaimation as well as in both enhancing crop yield and soil C stock by using biochar in crop-lands. Many works done have inidcated that the biochar produced from crop residues with pyrolysis under moderate and high temperature in absence of oxygen,has a highly aromatic chamical structure,physical and biological stability against thermal and biological decomposition,increases nutrient efficiency as well as improving soil habitat for soil biota. Thus,it is believed that application of biochar will reach a win-win effect for improving soil productivity and soil C stock in agriculture.

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