Abstract:

A pot experiment was conducted to investigate the effects of foliar application of different content of glycin and alanine on yield and quality of flowering chinese cabbage. Five treatments were applied: no fertilizer (CK), foliar application of 200 mg/kg glycin (Gly2), 500 mg/kg glycin (Gly5), 200 mg/kg alanine (Ala2) and 500 mg/kg alanine (Ala5). Results show that foliar application of 200 mg/kg glycin and alanine can improve yield of flowering chinese cabbage. The content of soluble sugar was increased significantly when amino acid addition with effect of Gly2 was the best. However, no effect was found of amino acid on chlorophyll, VC decreased when foliar application of amino acid. Treatments with glycin could reduce the content of nitrate and oxalic acid significantly, decreased by 85.03% and 70.19%, respectively. While the content of nitrate with alanine treatments was reduced fewer and the content of oxalic acid increased significantly. The NR and GDH were increased significantly by foliar application of amino acid,but the effects of glycin was better than those of alanine. It was suggested that foliar application of amino acid, especially glycin, could improved the yield and quality of flowering chinese cabbage.