Effects of Different Chemical Priming and Sowing Methods on the Seedling Emergence of Hybrid Japonica Rice
Received date: 2025-05-20
Online published: 2025-09-11
Improving sowing quality is an important guarantee for achieving high efficiency, superior quality, and high yield in rice production. In this study, seeds of the hybrid japonica rice varieties Huayou 14 and Shenyou 28 were used as experimental materials. Different concentrations of citric acid(CA) and gamma-aminobutyric acid (GABA) were applied for seed priming and soaking treatments, aiming to screen out the optimal treatment concentrations for these two agents. Subsequently, through two sowing methods—direct seeding in the field and seedling raising in trays—the effects of different sowing methods on the emergence of seeds treated with the agents were thoroughly investigated, with the goal of identifying the agents and treatment techniques that can effectively improve the field seedling emergence rate of the two hybrid japonica rice varieties. The results showed that both CA and GABA treatments promoted the germination rate and seedling growth of Huayou 14 and Shenyou 28 seeds. The optimal treatment concentration for both agents was 0.5 mmol/L. Moreover, priming treatment demonstrated significant advantages over soaking treatment in promoting seedling establishment and improving seedling quality. Field trial results indicated that CA priming treatment had a better effect on both the seedling establishing percentage and seedling quality of the two varieties under direct seeding conditions, while its effect under tray seedling raising conditions was relatively insignificant. GABA priming treatment significantly promoted the seedling establishing percentage and seedling quality of Huayou 14, and although it had no significant effect on the seedling emergence rate of Shenyou 28, it enhanced its seedling quality. The effects of GABA priming treatment were relatively consistent under both direct seeding and tray seedling raising conditions. In summary, in practical production processes, it is necessary to screen out suitable priming agents and their concentrations based on different hybrid japonica rice varieties and sowing methods.
Key words： hybrid japonica rice; CA; GABA; seed priming
WU Xuefan, HAN Jiajun, HU Weimin, LI Maobai, GUAN Yajing, LOU Jianfeng . Effects of Different Chemical Priming and Sowing Methods on the Seedling Emergence of Hybrid Japonica Rice[J]. China Rice, 2025 , 31(5) : 93 -99 . DOI: 10.3969/j.issn.1006-8082.2025.05.015
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