Abstract: The pot experiment was carried out to evaluate the effects of supplement of compound fertilizer with different morphology magnesium on yield and quality of Chinese cabbage. Three kinds of morphology magnesium，magnesium sulfate（MgSO4），amino-acid chelated magnesium（Mg-AA） or ethylenediamine tetra acetic acid disodium magnesium（Mg-EDTA） was supplemented into the fertilizer with four levels of Mg application，namely 1，3，5 and 7 mg · kg-1. The supplement of Mg-EDTA can increase yield significantly by 46.6% with 7 mg · kg-1 Mg application. The quality was improved greatly with the supplement of Mg-AA with increasing the content of chlorophyll，soluble sugar，soluble protein and vitamin C. The application of MgSO4 could increase the yield by 34.5% with 5 mg · kg-1 Mg application and keep relatively high quality.

Key words: Chinese cabbage, different morphology magnesium, yield, quality