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聚-γ-谷氨酸对直播稻抗倒伏性的影响

李子翔**，黄绒**，王志超，李鸿雁，谭俊行，程宇，杜雪竹*，盛锋*   

  1. 湖北大学生命科学学院 / 省部共建生物催化与酶工程国家重点实验室，湖北武汉 430062
  • 收稿日期:2024-12-11 修回日期:2025-03-26 接受日期:2025-03-26 网络出版日期:2025-04-01
  • 基金资助:
    本研究由湖北省中央引导地方专项项目(2020ZYYD036)和湖北省重点研发计划项目(2021BBA224)资助。

Effects of poly-γ-glutamate acid on lodging resistance of direct seeding rice

LI Zi-Xiang**,HUANG Rong**,WANG Zhi-Chao,LI Hong-Yan,TAN Jun-Xing,CHENG Yu,DU Xue-Zhu*,SHENG Feng*   

  1. School of Life Sciences, Hubei University / State Key Laboratory of Biocatalysis and Enzyme Engineering, Wuhan 430062, Hubei, China
  • Received:2024-12-11 Revised:2025-03-26 Accepted:2025-03-26 Published online:2025-04-01
  • Supported by:
    This study was supported by the Hubei Provincial Central Leading Local Special Project (2020ZYYD036) and the Key R&D Plan Projects in Hubei Province (2021BBA224).

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摘要：

探究聚-γ-谷氨酸(γ-PGA)对直播稻抗倒伏性、产量和品质的影响，为高产优质的水稻栽培技术提供理论依据和技术参考。于2022和2023年在湖北省武穴市花桥镇开展田间试验，采用双因素裂区设计，以直播方式水直播(W)和旱直播(D)为主区，不施加γ-PGA发酵液(P0)和施加25 kg hm?2 γ-PGA发酵液(P1)为副区，共4个处理，对水稻抗倒伏能力相关指标、产量、稻米品质进行测定。结果表明，施加γ-PGA能分别使水、旱直播下水稻第一基节茎粗增加10.3%~10.6%和7.5%~13.3%，第二基节茎粗增加10.5%~11.8%和8.2%~17.5%，茎秆壁厚增加23.7%~27.9%和12.5%~22.0%，抗折能力提高37.3%~52.7%和50.8%~54.5%，弯曲力矩提高3.8%~7.6%和4.1%~5.9%，折断弯距提高37.3%~52.7%和50.8%~54.5%，倒伏指数降低21.9%~29.1%和30.2%~32.2%。施加γ-PGA能改变水稻的茎秆强度，提高产量和稻米品质。

关键词: 直播稻, 聚-γ-谷氨酸(γ-PGA), 茎秆强度, 产量, 稻米品质

Abstract:

This study investigated the effects of poly-γ-glutamic acid (γ-PGA) on lodging resistance, yield, and grain quality in direct- seeded rice, aiming to provide a theoretical foundation and technical guidance for high-yield, high-quality rice cultivation. A field experiment was conducted in Huaqiao Town, Wuhui City, Hubei Province, in 2022 and 2023 using a two-factor split - plot design. The main plots consisted of two irrigation treatments: flooded (W) and dry (D) conditions. The subplots included two γ-PGA fermentation liquid treatments: no application (P0) and application at 25 kg hm?2 (P1). Key indicators of lodging resistance, yield, and grain quality were measured. The results showed that γ-PGA application significantly enhanced stem structural characteristics. Specifically, the first internode stem diameter increased by 10.3%–10.6% and 7.5%–13.3%, while the second internode stem diameter increased by 10.5%–11.8% and 8.2%–17.5%. Stem wall thickness improved by 23.7%–27.9% and 12.5%–22.0%. Additionally, bending moment increased by 3.8%–7.6% and 4.1%–5.9%, and breaking bending distance increased by 37.3%–52.7% and 50.8%–54.5%. Furthermore, the lodging index decreased by 21.9%–29.1% and 30.2%–32.2%, indicating improved lodging resistance. Overall, γ-PGA application enhanced stem strength, contributing to improved lodging resistance, increased yield, and enhanced grain quality in direct-seeded rice. These findings suggest that γ-PGA has the potential to be an effective agronomic strategy for optimizing rice production.

Key words: direct seeding rice, poly-γ-glutamic acid (γ-PGA), stem strength, yield, rice quality

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