Abstract: In order to understand the effect of slow-release boron fertilizer and the optimum boron fertilizer ratein the hilly area of Mianyang, Sichuanprovince, four treatments were used to study the effect of rape seed co-sowing with different boron fertilizers one mergence,seedling growth,yield and quality of rape. The results showed that rape seed co-sowing with slow-release boron fertilizers did not affect emergence and seedling growth. The co-sowing can not onlyincreaseyield but also improve qualityof rape. However,there were significant difference among different boron fertilizer rates. Rapereached the highest yield of 2 668.20 kg/hm² with the boron fertilizer rate of 9 kg/hm². The results can provide a theoretical basis for the reasonable and efficient application of slow-release boron fertilizer for rape in the area.

Key words: slow-release boron, direct seedingrape, seed co-sowing with fertilizer, quality