Characteristics of the soils and the maize leaves used in the experiment.

Different letters indicate significant (P<0.05) differences in soil properties between old-field and bare fallow soils from the same site.

不同字母表示同一试验点下，撂荒地（old-field）土壤与裸休闲地（bare fallow）土壤的土壤性质存在显著性差异（P<0.05）。