Abstract：Field experiments were conducted to study the effects of different slow release compound fertilizers on biological traits，yield，quality and nutrient content of tumorous stem mustard（Brassica juncea Coss.?var.?tumida Tsen et Lee）．The results showed that compared with special fertilization，application of slow release compound fertilizers was effective to improve the biological traits and yield of tumorous stem mustard．The treatment of slow released compound fertilizer dropped the contents of soluble sugar and increased free amino acids of tumorous stem，but the change of vitamin C was not outstanding，which also decreased the content of nitrate．On the whole，slow released compound fertilizer could increase the total nitrogen，phosphorus and potassium contents of stem and leaf of tumorous stem mustard．Considering various factors，the treatment of reducing 5% slow release compound fertilizer application（1 225.5 kg·hm-2）is an optimum choice.
