摘要
提高播种质量是水稻生产实现高效、优质、高产的重要保障。本研究以杂交粳稻品种花优14和申优28的种子作为试验材料,用不同浓度的柠檬酸(CA)和γ-氨基丁酸(GABA)对种子进行引发和浸种处理,旨在筛选出这两种药剂的最佳处理浓度。随后,将处理过的种子进行田间直播和秧盘播种育苗,以探究不同播种方式对种子出苗效果的影响,进而筛选出能够切实提高杂交粳稻种子田间成苗率的药剂及播种方式。结果表明,用CA和GABA引发和浸种均促进了花优14和申优28种子的萌发速率和幼苗生长。其中,两种药剂的适宜处理浓度均为0.50 mmol/L,且引发处理在促进成苗及提升成苗质量方面较浸种处理优势明显。田间试验结果表明,CA引发处理在直播条件下对花优14和申优28的成苗率和幼苗质量均有较好的促进作用,而在秧盘育苗条件下的效果则相对不显著。另一方面,GABA引发处理对花优14的成苗率和幼苗质量有明显的促进作用,而对申优28的成苗率虽无明显影响,但能够增加其幼苗质量。GABA引发处理在田间直播和秧盘育苗条件下的效果较为一致。在实际生产过程中,需要根据不同杂交粳稻品种及其播种方式,筛选出适宜的引发药剂及其浓度。
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.
作者
吴雪凡
韩家俊
胡伟民
李茂柏
关亚静
楼坚锋
WU Xuefan;HAN Jiajun;HU Weimin;LI Maobai;GUAN Yajing;LOU Jianfeng(The Advanced Seed Institute,College of Agriculture and Biotechnology,Zhejiang University/Zhejiang Key Laboratory of Crop Germplasm Innovation and Utilization,Hangzhou 310058,China;Shanghai Agricultural Technology Extension Service Center,Shanghai 201103,China)
出处
《中国稻米》
北大核心
2025年第5期93-99,104,共8页
China Rice
基金
上海市科技兴农项目(2022-02-08-00-12-F01127)
现代作物生产省部共建协同创新中心(CIC-MCP)。
作者简介
第一作者:吴雪凡,xuefanwu@zju.edu.cn;通信作者:楼坚锋,jfl_zj@126.com。
