Ameliorating effects of biochar application on degraded vegetable soil

【Objective】Effects of biochar application on improving properties of degraded vegetable soil were studied to provide scientific references for removing obstacles of degraded vegetable field. 【Method】A pot experiment was conducted to study the effects of biochar application on nutrients,pH and microorganism of the degraded vegetable soil. The experiment included four treatments,ie.,control without application of any chemical fertilizers or biochar,conventional fertilization with application of chemical fertilizers,biochar treatment with application of only biomass charcoal,and conventional fertilization+ biochar treatment with application of both biochar and chemical fertilizers. 【Result】Compared with the control and conventional fertilization,the application of biochar increased soil aeration,pH,available Ca,Mg,Mo,and Si,micro-biomass C, number of bacterium and actinomyces,and value of B/F(bacterium+actinomyces/fungus),and decreased soil bulk density,soil exchangeable acidity,and number of fungus. However, the application of biochar had no significant effects on soil total P,N and water-soluble salt. 【Conclusion】Application of biochar can remarkably improve vegetable soil and its biological environment, so biochar is suitable for ameliorating degraded vegetable soil.