采穗批次和冷藏对福白菊种苗质量与产量的影响OACSTPCD

The cuttings were continuously harvested from the overwintering mother plant of'Fubaiju'to study the maximum reproduction coefficient of cuttings and compare the quality of different batches of cuttings and rooted seedlings.Plant height,crown width,and yield were observed during the full bloom period to assess the yield differences among different batches of cuttings and rooted seedlings,providing a basis for the breeding and high-yield cultivation of'Fubaiju'seedlings.The results showed that 10 batches of cuttings could be harvested from the overwintering mother plants of'Fubaiju'.During the suitable planting period,5 batches of refrigerated cuttings and 5 batches of refrigerated rooted seedlings were produced,resulting in more than 40 cutting seedlings from a single'Fubaiju'in spring.At the later stages,the cuttings tended to become thinner,with a decrease in the number of roots,but the total root length and average root length tended to increase.Refrigeration for up to 30 days did not significantly affect the preservation quality of rooted seedlings and cuttings,but the loss rate increased after refrigeration for more than 30 days.Furthermore,refrigeration for 20 to 30 days had a positive effect on the growth and yield of rooted seedlings.The flower yield of rooted seedlings after refrigeration was higher than that of cuttings after refrigeration.In terms of seedling sources,the flower yield of rooted seedlings from the first to fourth batches of cuttings collected from the overwintering mother plant was higher than that of other batches.Regarding planting time,the yield of seedlings planted from mid-to-late May was not lower than that of previous plantings.From the 5th to the 7th batch,as the planting period was delayed,the plant height,crown width,and yield per plant showed a declining trend.Comparing seedlings planted after May,the flower yield of the second-generation rooted seedlings from cuttings was better than that of the first generation in similar planting periods.