With the conjunctive application of fertilizer and gypsum,the effects of biological properties on corns were studied via pot experiments,and the appropriate fertilizer varieties were discussed.The results showed that organic-inorganic compound fertilizers,the combination of bio-organic fertilizer and inorganic compound fertilizer could significantly increase the contents of chlorophyll and the activity of POD and SOD of the corn,and could sharply decrease the contents of MDA.With the increase of gypsum's us...