The age and morphological traits of the transplanted plants were as follows: A65, 65 days after planting, 6 leaves, with a plant height of 47.8 cm and a pseudostem diameter of 5.50 mm; A45, 45 days after planting,5 leaves, with a plant height of 41.6 cm and a pseudostem diameter of 4.39 mm; A25, 25 days after planting, 4 leaves, with a plant height of 36.7 cm and a pseudostem diameter of 4.31 mm. The status of the plants before vernalization is shown in Table 1.