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Acta Agron Sin ›› 2016, Vol. 42 ›› Issue (01): 93-103.doi: 10.3724/SP.J.1006.2016.00093


Effects of Seed Dressing with Uniconazole Powder on Lodging Resistance of Culm in Common Buckwheat

LIU Xing-Bei1,**,WANG Can1,**,HU Dan1,YANG Hao1,SHE Heng-Zhi1,RUAN Ren-Wu1,2,WU Dong-Qian1,*,YI Ze-Lin1,2,*   

  1. 1 College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; 2 Innovation Team of Chongqing Buckwheat Industry System, Chongqing 400716, China
  • Received:2015-03-27 Revised:2015-09-06 Online:2016-01-12 Published:2015-10-08
  • Contact: 易泽林, E-mail: yzlin1969@126.com; 吴东倩, E-mail: 5042347111@qq.com E-mail:wangc.1989@163.com
  • Supported by:

    This study was supported by the Fundamental Research Funds for the Central Universities (XDJK2015B010), Chongqing Buckwheat Industry System Innovation Team (CQCYT2011001) and Chongqing Key Application Development Project of Science and Technology Plan (cstc2013yykfb0118).


Lodging is one of the important factors affecting the yield and quality of common buckwheat (Fagopyrum esculentum M.) worldwide. Ningqiao 1, a cultivar of common buckwheat with moderate lodging resistance was used in this study to investigate the dynamic changes of lodging behavior, yield, culm snapping resistance, lodging index, culm morphological characteristics and culm anatomical structure seed dressing with uniconazole powder(0, 100, 200, and 300 mg kg-1). The results indicated that seed dressing with uniconazole powder had significantly effects on the lodging resistance of culm in common buckwheat. With the increase of uniconazole powder concentration, the yield, culm snapping resistance, diameter of the 2nd internode, dry weight of the 2nd internode, filling degree, mechanical tissue layer number, mechanical tissue thickness, culm wall thickness, vascular bundle number, and vascular bundle area showed an increased-decreased trend, whereas, the lodging percentage, lodging index, plant height, culm gravity height, culm fresh weight, and length of the 2nd internode showed an decreased-increased trend. In this case, the treatment of seed dressing with 200mg kg-1 uniconazole powder could optimize the culm structure, improve the culm quality, reduce the lodging risk, and enhance the yield of common buckwheat.

Key words: Common buckwheat, Uniconazole, Lodging resistance, Morphological characteristics, Anatomical structure

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