The co-crop of Sedum alfredii Hance and Z. mays restrained the exudations of malic and formic acids, but enhanced the exudations of acetic and succinic acids.

• 玉米和超富集东南景天套种明显抑制根系苹果酸和甲酸的分泌，而乙酸和琥珀酸的分泌大幅度增加；