Use of crop residues with alkaline slag to ameliorate soil acidity in an Ultisol
L Wang, CR Butterly, XL Yang, Y Wang, HMSK Herath, X Jiang
SOIL USE AND MANAGEMENT | WILEY-BLACKWELL | Published : 2012
Information regarding the interaction between liming agents and crop residues on soil acidity amelioration is limited. A laboratory incubation study was undertaken to investigate the combined application of alkaline slag (AS, the major component is CaO) and crop residues with different C/N ratios and ash alkalinity content. Incorporation of amendments was effective in reducing soil exchangeable acidity and Al saturation and increasing exchangeable base cations (P<0.05), but the effect of AS on soil pH adjustment was reduced when added with a high amount of residue with a low C/N ratio. Initial increases in soil pH were attributed to the release of alkalinity from the combined amendments and ..View full abstract
Awarded by Key Projects of National Research Program of China
This work was possible because of the financial support of the Key Projects of National Research Program of China (2009BADC6B02). We thank the two anonymous referees for their helpful comments.