| To analyze the difference of germination of Platycodon grandiflorum seeds with different colors, and to improve the germination rate and utilization rate of P.grandiflorum seeds with different seed coating agents. Through observation of the appearance of P. grandiflorum seeds from 10 areas, the color classification was used to observe the water content, 1000-grain weight, germination potential, germination rate and other indicators, the seeds were coated with different seed coating agents to determine the germination standared of P. grandiflorum seeds, and to screen a seed coating agent suitable for P. grandiflorum seeds. The results showed that, P. grandiflorum seeds were mainly divided into black seeds, yellow seeds and green seeds. The germination rates were 82.3%~88.3%, 50.3%~57.0% and 38.7%~44.0%, respectively. After the P. grandiflorum seeds were coated with T3 concentration of B seed coating agent, the germination rate of the seeds in the paper bed was about 7% higher than the control, and the mildew rate was reduced by about 13%. The seedling rate of the seeds in the sand bed was about 10% higher than that of the control. Therefore, the black P. grandiflorum seeds are the best, and the effect of treatment with T3 concentration of B seed coating agent is the highest. |
