• ISSN 1008-505X
  • CN 11-3996/S
郑春风, 刘春增, 任伟, 李本银, 王守刚, 聂良鹏, 吕玉虎, 潘兹亮, 曹卫东. 不同时期叶面喷施多效唑对紫云英结实性的影响[J]. 植物营养与肥料学报, 2021, 27(1): 172-178. DOI: 10.11674/zwyf.20075
引用本文: 郑春风, 刘春增, 任伟, 李本银, 王守刚, 聂良鹏, 吕玉虎, 潘兹亮, 曹卫东. 不同时期叶面喷施多效唑对紫云英结实性的影响[J]. 植物营养与肥料学报, 2021, 27(1): 172-178. DOI: 10.11674/zwyf.20075
ZHENG Chun-feng, LIU Chun-zeng, REN Wei, LI Ben-yin, WANG Shou-gang, NIE Liang-peng, Lü Yu-hu, PAN Zi-liang, CAO Wei-dong. Effects of spraying stages of paclobutrazol on seed setting characteristics of Chinese milk vetch (Astragalus sinicus L.)[J]. Journal of Plant Nutrition and Fertilizers, 2021, 27(1): 172-178. DOI: 10.11674/zwyf.20075
Citation: ZHENG Chun-feng, LIU Chun-zeng, REN Wei, LI Ben-yin, WANG Shou-gang, NIE Liang-peng, Lü Yu-hu, PAN Zi-liang, CAO Wei-dong. Effects of spraying stages of paclobutrazol on seed setting characteristics of Chinese milk vetch (Astragalus sinicus L.)[J]. Journal of Plant Nutrition and Fertilizers, 2021, 27(1): 172-178. DOI: 10.11674/zwyf.20075

不同时期叶面喷施多效唑对紫云英结实性的影响

Effects of spraying stages of paclobutrazol on seed setting characteristics of Chinese milk vetch (Astragalus sinicus L.)

  • 摘要:
    目的 探讨多效唑喷施时期对紫云英结实特性的影响,明确紫云英结实性最佳化控时期,以期为提高紫云英种子产量提供参考。
    方法 以‘信紫1号’为供试材料,分别于越冬后期 (T1)、返青期 (T2)、现蕾期 (T3)、初花期 (T4) 和花后5天 (T5) 进行叶面喷施处理,以喷施清水为对照。在盛花期,观察记载主茎不同花序位花荚发育的形态及数量特征。在成熟期,按常规考种法调查了产量和产量构成因素。
    结果 除T3处理外,其他4个处理的紫云英花数、结荚数、籽粒数、结荚率和荚果结实率在不同层花序上与对照差异均不明显,不同层花序的粒重也没有显著差异。T3处理其花数、结荚数、籽粒数、结荚率和荚果结实率在基部花序位较对照分别提高20.4%、31.4%、23.9%和5.25、2.38个百分点,在中部花序位分别提高12.3%、32.9%、22.8%和7.42、2.08个百分点,在顶部花序位分别提高18.4%、54.8%、70.9%和2.56、3.78个百分点。T3处理种子产量最高达到1120.66 kg/hm2,较对照增产32.3%。
    结论 在现蕾期叶面喷施多效唑,可促进紫云英花期不同花序位,特别是中部和基部花荚的发育,减少花荚脱落,促进结实成粒,最终获得较高的种子产量。过早和过晚喷施多效唑对紫云英开花和籽粒产量均没有显著影响。

     

    Abstract:
    Objectives The effect of applying paclobutrazol at different stages were compared through seed setting characteristic of Chinese milk vetch, in expectation of providing references for improving yield through use of chemical regulation.
    Methods A Chinese milk vetch cultivar ‘Xinzi No.1’” was used in a field experiment. Five foliar application stage treatments were setup, including late wintering (T1), returning green (T2), squaring (T3), pre-flowering (T4), and 5 days after-flowering (T5), and foliar spraying water was used as control (CK). During the flowering stage, the morphological and quantitative characteristics of flowers and pod setting at the basal, central, and apical inflorescences were investigated. At harvest, the number of pod, seed and seed weight at the three inflorescences, and the yield and yield components were determined using conventional methods.
    Results The number of flowers, pods and seeds, and the setting rates of pods and seeds at bottom, central and apical inflorescences in all the spraying stage treatments, except in squaring stage, did not differ significantly from those in the control. When sprayed at the squaring stage, the seed yield was the highest, and was 32.3% higher than control. Under the spraying stage, the number of flowers, pods, seeds and the pod and seed setting rates in the basal inflorescences were increased by 20.4%, 31.4%, 23.9%, 5.25% and 2.38%, and by 12.3%, 32.9%, 22.8%, 7.42% and 2.08% in the central inflorescences, and by 18.4%, 54.8%, 70.9%, 2.56% and 3.78% in the apical inflorescences, respectively, compared with the control. The seed weights at the three inflorescences did not differ significantly with those of the control.
    Conclusions Foliar application of paclobutrazol at squaring stage is effective in promoting the flower development, reducing the shedding, and benefit the setting of pods and seeds, especially in the basal and central inflorescences, and result in high seed yield at last. Foliar spraying paclobutrazol before and after squaring stage will not have the promotion effect.

     

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