Fig. 5From: Urease and β-glucosidase activity enhanced the transformation of functional groups of humin amended by straw and straw-derived biocharUrease activity (a), β-glucosidase activity (b). Notes: Different capital letters in a single column indicate significant difference (P < 0.05) between treatments; different low case letters in a single column indicate significant difference (P < 0.05) for the same treatment between soil typesBack to article page