Abstract: To investigate the effects of coated mutual mix fertilizer application.The effects of coated mutual mix fertilizer on rapeseed yield,nutrient accumulation and soil nutrient morphology was researched by multi-region field plot experiments.Compared with ordinary mutual mix fertilizer,coated mutual mix fertilizer could significantly improve the yield of rapeseed,and the average yield reached 2 501.00 kg/ha,reaching to 13.72% compared to an average increase rate,it also could significantly improve the yield of rapeseed stalk,and improve the root yield to some extent,while the pericarp yield were not affected;coated mutual mix fertilizer promote nutrients accumulation rapidly in the latter period,mainly presenting in the accumulation of nitrogen and potassium and phosphorus accumulation did not show good results;Coated mutual mix fertilizer nutrient releasing performed better in Hengyang,followed by Xiangtan,Ningxiang was worst,nitrogen releasing in Hengyang area coordinated with rape growth,the effect of potash was reflected in Xiangtan region,phosphate showed no slow-release fertilizer effect;The important reasons that caused the differences in nutrient release of coated fertilizer soil nutrient concentrations and soil temperature.This experiment studies had shown that N-P₂O₅-K₂O(12-6-7)fertilizer for canola envelope could improve the yield of oilseed rape,but the effects was different in different places,phosphorus nutrient releasing couldn't coordinated with rape growth,to achieving the purpose of slow-release fertilizer,small adjustments to large envelope recipe or changing technology must be taken.

Key words: Coated mutual mix fertilizer, Oilseed rape, Yield, Nutrient accumulation, Patterns of soil nutrients

CLC Number: 

• S147.2