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| Effects of Different Concentrations of Prohexadione Calcium on the Growth of Green Onion Seedlings |
| WANG Jing，MA Fusheng，HU Penghao，XU Youquan，CUI Dandan，SONG Xiangda，GENG Yongqi，HE Xueying，LI Shengli* |
| College of Horticulture，Henan Agricultural University，Zhengzhou 450046，Henan，China |
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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．
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Received: 14 September 2023
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