草地学报

草地学报 ›› 2022, Vol. 30 ›› Issue (2): 412-417.DOI: 10.11733/j.issn.1007-0435.2022.02.019

• 研究论文 • 上一篇    

多效唑对少花蒺藜草生物学特性的影响

卢轩1, 高凯1, 孙忠林1, 孟根其木格2, 华桂兰2, 董艳伟3   

  1. 1. 内蒙古民族大学, 内蒙古 通辽 028043;
    2. 通辽市草原工作站, 内蒙古 通辽 028042;
    3. 兴安盟林业和草原工作站, 内蒙古 兴安盟 137400
  • 收稿日期:2021-06-02 修回日期:2021-10-19 发布日期:2022-03-10
  • 通讯作者: 高凯,E-mail:gaokai555@126.com
  • 作者简介:卢轩(1996-),男,汉族,硕士研究生,主要从事饲草高产栽培与利用研究,E-mail:1564575373@qq.com
  • 基金资助:
    开鲁县草原刺萼龙葵和少华蒺藜草本底调查及防空试验(S20016)资助

Effects of Paclobutrazol on Biological Characteristics of Cenchrus pauciflorus

LU Xuan1, GAO Kai1, SUN Zhong-lin1, MENGGEN Qimu-ge2, HUA Gui-lan2, DONG Yan-wei3   

  1. 1. Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028043, China;
    2. Tongliao Grassland Work Station, Tongliao, Inner Mongolia 028042, China;
    3. Xingan League Forestry and Grassland Workstation, Xingan League, Inner Mongolia 137400, China
  • Received:2021-06-02 Revised:2021-10-19 Published:2022-03-10

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摘要： 为防治和遏制入侵植物少花蒺藜草(Cenchrus pauciflorus)生长及扩散，对分蘖期的少花蒺藜草喷施不同浓度的多效唑，成熟期测定其株高、分蘖数、穗长、穗数、穗粒数和各器官生物量，计算茎叶比、根冠比和各器官贡献率。结果表明：多效唑浓度为100 mg·L-1时，对少花蒺藜草株高抑制效果最明显；随着多效唑浓度的增大，少花蒺藜草的叶片生物量显著增加、根系生物量显著下降，茎叶比和根冠比显著下降(P<0.05)；当多效唑施用浓度达到300 mg·L-1时，少花蒺藜草的穗数最少，根系生物量、根冠比和茎叶比最小；当施用400 mg·L-1的多效唑时，叶片生物量最大，穗粒数最少。综合来看，低浓度的多效唑可有效降低少花蒺藜草株高，而较高浓度的多效唑，可抑制少花蒺藜草分蘖，减少有效穗数及穗粒数。

关键词: 少花蒺藜草, 多效唑, 生物学特性, 防控措施, 入侵生物

Abstract: To prevent and control the growth and diffusion of invasive plant Cenchrus pauciflorus,different concentrations of paclobutrazol were sprayed on Cenchrus pauciflorus at tillering stage. The plant height,tiller number,ear length,ear number,grain number per ear,and biomass of each type of organ were measured at maturity,and the stem leaf ratio,root shoot ratio,and contribution rate of each organ were calculated. The results showed that when the concentration of paclobutrazol was 100 mg·L-1,the control effect on the plant height of Cenchrus pauciflorus was the most obvious. With the increase of paclobutrazol concentration,the leaf biomass increased significantly,the root biomass decreased significantly,and the stem leaf ratio and root shoot ratio decreased significantly (P<0.05). When the application concentration of Paclobutrazol was 300 mg·L-1,the number of panicles,root biomass,root shoot ratio,and stem leaf ratio were the least. When 400 mg·L-1 paclobutrazol was administered,the leaf biomass was the largest and the number of grains per ear was the least. Overall,a low concentration of paclobutrazol can effectively reduce the plant height of Cenchrus pauciflorus,while a high concentration of paclobutrazol can inhibit the tillering of Cenchrus pauciflorus,and reduce the number of effective panicles and grains per panicle.

Key words: Cenchrus pauciflorus, Paclobutrazol, Biological characteristics, Prevention and control measures, Invasive organisms

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