Abstract：Taking 3 types of pakchoi〔Brassica campestris L. ssp. chinensis（L.）Makino var. communis
Tsen et Lee〕with different bolting ability as test material，this experiment adopted different low temperature
and illumination to induce vernalization on seedlings，and studied the effects of 9 vernalization combinations
on vegetative mass，bolting，blooming and seed quality of pakchoi．The results showed that the maximum
differences in plant open width degree among different vernalization combinations in early，medium and late
bolting types were 17.1，6.3 and 6.5 times．And the maximum differences in single plant weight were 5.6，
2.8 and 2.9 times，respectively．The flowering date of each bolting type were significantly ahead of schedule，
along with the increase of vernalization days number．For the early bolting，medium bolting and late bolting
types，the maximum differences of flowering date between the different vernalization combinations of early
bolting and medium bolting types were 54，39 and 36 days．For the early bolting and medium bolting types，
the average single plant seed weight and germination rates were the best，when the vernalization treatments
were happened on 20-20，20-25，respectively．By adjusting bolting anthesis and seed collecting stage，
breeding generation-adding link and normal breeding cycle were complete articulation，thus realizing the
breeding target of 2 generations one year for pakchoi in southern Zhejiang areas．
舒骏，黄文斌，娄建英，冯光，张建隆，李乐斌，张景丽，吴小宝. 不同春化天数对浙南地区普通白菜秋季加代繁种的影响[J]. 中国蔬菜, 2021, 1(1): 73-78.
SHU Jun，HUANG Wenbin，LOU Jianying，FENG Guang，ZHANG Jianlong，LI Lebin，ZHANG Jingli，WU Xiaobao. Effect of Different Numbers of Vernalization Day on Autumn Generation-adding Seed Reproduction of Pakchoi in Southern Zhejiang. China Vegetables, 2021, 1(1): 73-78.
