Abstract: This experiment aims to study the effects of applying boron could improve the yield and the quality of thespring double -low rape in Inner Mongolia obviously, but meanwhile the effect mechanism of applying boron on the yieldand the quality formation and fertilizer application technique perfectly.This experiment was carried out in the farm of In -ner Mongolia Agriculture University.With the research of the effects of boron on the yield and quality of rape, the influ -encing mechanism and the relationship of the yield and quality to boron concentrations each other were clarified clearly,so as to supply the methodological conduction for rape?s developing.The effect of different boron application on the yieldand quality of double -low spring rap(Qing You14)were studied. The experiment was carried out with double -low springrape ? Qing You No. 14?. Single factor, five level randomize designwas used in this experiment, and the effect of differentfertilizing application on the yield of rape and quality was studied. The results were showed as following:the siliques perplant and the amount of boron -application had a significant linear relation ship, and the seeds per plant and the amount ofboron -application had a quadratic function relation. Application fertilizer properly could adjust the relation of siliques perplant and the seeds per plant.Rapeseed yield had positive correlatronwith siliques per plant, while negative the seeds perplant, negative relevance existed. Fertilizer application properly could improve the yield and the oil content, increasing thecoarse fat and protein?s content, reducing the Glucosinolate content. Between rapeseed yield and oil content with boron -application existed a quadratic equation.The rapeseed yield and oil content could arrive the max of 3 154?18 kg/hm2and 1 344?61 kg/hm²when the boron -application were 17?84 kg/hm²and 19?42 kg/hm²?But over application could reduceyield.The max coarse fat content was 45?3% when the boron application was 24?62 kg/hm²?The glucosinolate contentand the boron -application had quadratic function relation. When the boron application was 19?42 kg/hm², the glucosino -late content was 10?29 mg/g. Considered all the factors, the best boron -application should be 19?42 kg/hm².

Key words: Boron, Spring rape(Brassica napus. L.), Yield, Quality

CLC Number: 

• S565.4