Abstract: The effects of foliar application of 5-aminolevulinic acid at different concentrations on yield, chlorophyll, vitamin C, protein and soluble sugar content of cream cabbage were studied. The results showed that compared with the control group, spraying 5-aminolevulinic acid solution at different concentrations on the leaves had significant effects on the quality indexes of cream cabbage. The chlorophyll content and vitamin C content reached the highest when spraying 5-aminolevulinic acid solution at 1.70 g/L on the leaves, and the protein content and soluble sugar content reached the highest when spraying 5-aminolevulinic acid solution at 0.85 g/L on the leaves. The effect of spraying different concentrations of 5-aminolevulinic acid on the yield of cream cream was not obvious.

Key words: cream cabbage, 5-aminolevulinic acid, yield, quality