不同化肥施用量对花溪芜菁甘蓝种子产量的影响.

The effect of different N, P and K combination levels on seed yield and economic traits of Brassica hapobrassica was studied by the quadratic regression rotation combination design to speed up application and popularization speed of new pasture varieties. Results: The mathematic model between fertilizer factor and seed yield is successfully established. The highest seed yield and output value are 2918.06 kg / hm2 and 291 806. 00 Yuan / hm2 under the application condition of 112. 4 kg / hm2 urea + 123 kg/hm2 calcium magnesium phosphate+ 96. 4 kg / hm2 potassium sulphate respectively. The effect of fertilizer factors on seed yield is P > N > K. The contribution of different economic traits on seed yield is main inflorescence length > effective branches > height > pods / plant > seeds / pod > thousand seeds weight. The seed yield of Brassica hapobrassica can be effectively increased by improving main inflorescence length and effective branches, followed by improving height. [ABSTRACT FROM AUTHOR]