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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (36): 36-40.doi: 10.11924/j.issn.1000-6850.casb2021-0184

所属专题： 油料作物

• 农学·农业基础科学 • 上一篇    下一篇

多效唑、烯效唑对油菜‘秦优1618’苗期特性和抗寒性的影响

王学芳(), 张忠鑫, 郑磊, 董育红, 张耀文, 田建华   

  1. 陕西省杂交油菜研究中心,陕西杨凌712100
  • 收稿日期:2021-02-26 修回日期:2021-07-01 出版日期:2021-12-25 发布日期:2022-02-15
  • 作者简介:王学芳,女,1967年出生,陕西澄城人,副研究员,硕士,研究方向：主要从事油菜育种与栽培技术研究。通信地址：712100 陕西省杨凌区高干渠路西段6号 陕西省杂交油菜研究中心,Tel：029-68259031,E-mail： sheriwxf2006@126.com。
  • 基金资助:
    十三五国家重点研发计划项目“长江下游及黄淮油菜高产优质适宜机械化新品种培育”(2018YFD0100600);“黄淮地区适宜机械化油菜新品种培育”(2018YFD0100603)

Effects of Paclobutrazol and Uniconazole on Seedling Characteristics and Cold Resistance of Rapeseed ‘Qinyou 1618’

WANG Xuefang(), ZHANG Zhongxin, ZHENG Lei, DONG Yuhong, ZHANG Yaowen, TIAN Jianhua   

  1. Hybrid Rapeseed Research Center of Shaanxi Province, Yangling, Shaanxi 712100
  • Received:2021-02-26 Revised:2021-07-01 Online:2021-12-25 Published:2022-02-15

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摘要：

为探索多效唑和烯效唑对油菜新品种‘秦优1618’抗寒性的影响,采用多效唑150 mg/L(C1)、300 mg/L(C2),烯效唑80 mg/L(C3)、160 mg/L(C4)喷施6~7叶期油菜幼苗1次,研究多效唑和烯效唑对幼苗生长调控、生理特性和抗寒性的影响。结果显示：采用多效唑150 mg/L(C1)或烯效唑80 mg/L(C3)处理6~7叶期幼苗,可有效降低苗期薹茎高、茎叶干质量、最大叶长度和宽度,对绿叶数影响不显著,有效提高根茎粗、根长、侧根数、根干质量和根冠比,形成壮苗;同时可增加叶片叶绿素和可溶性糖含量,降低相对电导率,提高叶片净光合速率,降低越冬死亡株率和冻害指数,提高抗寒性。

关键词: 油菜, 秦优1618, 多效唑, 烯效唑, 苗期特性, 抗寒性

Abstract:

In order to explore the effects of paclobutrazol and uniconazole on the cold resistance of a new rapeseed cultivar ‘Qinyou 1618’, seedlings at 6-7 leaf stage were sprayed with 150 mg/L (C1) and 300 mg/L (C2) paclobutrazol, and 80 mg/L(C3) and 160 mg/L(C4) uniconazole, respectively. The effects of paclobutrazol and uniconazole on the growth regulation, physiological characteristics and cold resistance of seedlings were studied. The results showed that the treatment of 150 mg/L paclobutrazol (C1) or 80 mg/L uniconazole (C3) on the rapeseed seedlings at 6-7 leaf stage could effectively reduce the stem height, the stem and leaf dry matter amount, and the maximum leaf length and width, but had no significant effect on the number of green leaves. The treatments could effectively increase the root diameter, root length, lateral root number, root dry matter amount, and root-shoot ratio, thus forming strong seedlings. Under the treatments, the content of chlorophyll and soluble sugar and the net photosynthetic rate of leaves increased, while the relative electrical conductivity, the percentage of dead plants over winter and the freezing injury index decreased. Therefore, the cold resistance of the cultivar was improved.

Key words: rapeseed, Qinyou1618, paclobutrazol, uniconazole, seedling characteristics, cold resistance

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