Abstract: A pot experiment was conducted to study the effects of two controlled-release f 〖JP2〗ertilizers CRFA (4% resin-coated, N∶〖KG-*2〗P2O5∶〖KG-*2〗K2O=14∶〖KG-*2〗14∶〖KG-*2〗14) and CRFB (4% resin-coated, N∶〖KG-*2〗P2O5∶〖KG-*2〗K2O=20∶〖KG-*2〗8∶〖KG-*2〗10) on the nutrient uptake and growth of Chrysanthemum morifolium, with common 〖JP〗compound fertilizer CCF (N∶〖KG-*2〗P2O5∶〖KG-*2〗K2O=15∶〖KG-*2〗15∶〖KG-*2〗15) as the control. Six treatments were installed, i.e., CCF1 (CCF, 6 g N·pot-1), CCF2 (CCF, 3 g N·pot-1), CRFA1 (CRFA, 6 g·pot-1), CRFA2 (CRFA, 3 g·pot-1), CRFB1 (CRFB, 6 g·pot-1), and CRFB (CRFB, 3 g·pot-1). On the 30th day of applying common compound fertilizer CCF1 and CCF2, soil available N, P and K contents were 16329 and 14526 mg·kg-1, 18039 and 16313 mg·kg-1, and 30008 and 21315 mg·kg-1, respectively, and decreased rapidly since then. In treatments CRFA1, CRFB1, CRFA2, and CRFB, soil available N content increased slowly, and reached the peak on the 60th day after fertilizing, being 12951, 13865, 11836, and 12631 mg·kg-1, respectively. Soil available P con tent had the same variation trend. Its maximum concentration was 16954 and 133 46 mg·kg-1 in treatments CRFA1 and CRFA2 on the 30th day after fertiliz ing, and 13713 and 8468 mg·kg-1 in treatments CRFB1 and CRFB2 on the 60th day after fertilizing, and decreased slowly then. The agronomic traits such as leaf area, leaf area index, branch number, flowering rate, flower number, an d flower diameter, etc., in treatments CRFA and CRFB were obviously better than those of the control, and CRFB was better than CRFA, suggesting that CRFB more m atched the nutrient demand of C. morifolium. Under the conditions of present experiment, applying CRFB2 obtained the highest yield.

Key words: lipopolysaccharides, immunotoxicity, oxidative stress.