中文摘要：

土壤缺钾已成为影响作物产量和品质,限制我国农业可持续发展的重要因素之一,亟待深入开展如何提高土壤钾素生物有效性的相关研究。本文收集整理了近年来研究者比较感兴趣的生物炭对土壤肥力,特别是对土壤钾素生物有效性影响的相关资料,从生物炭影响土壤温度、水分、p H值、阳离子交换量、微生物生物量与活性、作物根系生长与活动等方面论述了生物炭影响土壤钾素生物有效性的可能机理,并提出了今后需要深入研究的方面。

英文摘要：

Soil potassium deficiency has become one of the important factors that affecting crop yield and quality,and limits the sustainable development of China＇s agriculture. It is urgent to further research on how to increase the availability of soil potassium. Therefore,the authors collected and summarized some information about the effects of biochar on soil fertility,especially on the availability of soil potassium. The information showed the research results on how biochar changed the dynamics of soil potassium and improved its bioavailability. The possible mechanisms affecting the availability of soil potassium from several topics including soil temperature,soil moisture,p H,cation exchange capacity,microbial biomass and activity,as well as crop roots activities were discussed,and finally the research objectives that should be focused on was put forward. The paper provided some useful information for promoting the research and application of biochar in future.