Research on Fertilizer Effects on Confectionary Sunflower in Northwest Hebei of China

[Objective] The aim was to study the fertilizer effects on confectionary sunflower in northwest Hebei of China.[Method] Fine excellent varieties were sampled to carry out a '3414' test to study different N,P and K fertilization levels,so as to explore the optimum fertilization benefit and optimum fertilization combination of the new varieties.[Result] K fertilizer had the largest effect on the yield of confectionary sunflower.The maximum yielding fertilization combination of conventional varieties was 71.7 kg/hm2 N,48.3 kg/hm2 P2O5 and 68.4 kg/hm2 K2O,under which the yield was 3 052.5 kg/hm2.The best fertilization combination for highest economic benefits was 67.2 kg/hm2 N,50.1 kg/hm2 P2O5 and 68.3 kg/hm2 K2O,under which the yield was 2 909.7 kg/hm2.The maximum yielding fertilization combination of hybrid varieties was 65.1 kg/hm2 N,66.5 kg/hm2 P2O5 and 154.4 kg/hm2 K2O,under which the yield was 3 302.4 kg/hm2.The best fertilization combination for highest economic benefits was 72.8 kg/hm2 N,57.8 kg/hm2 P2O5 and 138.7 kg/hm2 K2O,under which the yield was 3 291.3 kg/hm2.[Conclusion] The research provides a scientific basis for the promotion and cultivation technology of the new varieties.