Abstract：The green onion variety ‘Dongsenhancong No.2’ was used as experimental material，and the effects of different concentrations of prohexadione calcium（Pro-Ca，200，400，600，800 mg · L-1 ）on the quality of green onion seedlings were investigated by measuring the morphological index，chlorophyll content and root activity at seedling stages．The results showed that Pro-Ca could effectively increase the pseudostem diameter，pseudostem length and chlorophyll content of green onion seedlings leaves，enhance root activities，promote root growth，and the appropriate concentration of Pro-Ca was 600 mg · L-1 ．Compared with water control treatment，the pseudostem diameter，pseudostem length and root activity of green onion seedlings treated with 600 mg · L-1 Pro-Ca were increased by 22.0%，66.9% and 65.7%，respectively，while the root，pseudostem，leaves and whole plant dry weight were increased by 38.5%，48.4%，34.6% and 37.9%，respectively，at 21 days after treatment．The root shoot ratio，seedling index and total chlorophyll content under 600 mg · L-1 Pro-Ca treatment were increased by 23.0%，37.0% and 19.4% in comparison to 200 mg · L-1 chlormequat chloride（CCC）treatment．In conclusion，the quality of green onion seedlings can be improved by spraying 600 mg · L-1 of Pro-Ca on the leaf surface at seedling stage．
王婧，马付生，胡鹏昊，徐有权，崔丹丹，宋向达，耿永琪，何雪颖，李胜利. 不同浓度调环酸钙对大葱幼苗生长的影响[J]. 中国蔬菜, 2024, 1(4): 106-114.
WANG Jing，MA Fusheng，HU Penghao，XU Youquan，CUI Dandan，SONG Xiangda，GENG Yongqi，HE Xueying，LI Shengli . Effects of Different Concentrations of Prohexadione Calcium on the Growth of Green Onion Seedlings . China Vegetables, 2024, 1(4): 106-114.
