Moreover, nitrate content was reduced by 7.64% and 11.77% respectively through applying DCD in soil or foliar spraying compound agents of oxalate, Gly and KCl before harvest, while the yield and quality were not affected significantly.

• 施用双氰胺和采收前喷施草酸、甘氨酸、KCl复合剂均显著减少蔬菜对硝酸盐的积累；分别使小白菜硝酸盐含量降低了7.；64%25；11