Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (18): 46-51.doi: 10.11924/j.issn.1000-6850.casb14120152

Special Issue: 玉米 农业气象

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Stalk Mechanical Characteristics of Different Summer Maize Varieties and Its Response to Drought Stress

Xia Laikun1, Liu Jingbao1, Zhu Weihong1, Xue Huazheng1, Gu Limin1, Li Xinze2, Huang Lu1, Qiao Jiangfang1, Li Chuan1, Guo Guojun1   

  1. (1Cereal Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002; 2Institute of Agricultural Sciences of Xihua, Xihua Henan 466600)
  • Received:2014-12-23 Revised:2015-06-03 Accepted:2015-02-10 Online:2015-07-27 Published:2015-07-27

Abstract: In order to study the effect of drought stress on the stalk mechanical characteristics of different summer maize varieties and discuss the drought resistance ability of different summer maize varieties from the angle of stalk mechanical characteristics, the author used 8 main summer maize cultivars in Henan and analyzed the effects of drought stress on stalk break strength, stalk crushing strength and puncture strength. The results showed that drought stress had significant effect on stalk lodging resistance and the lodging resistance declined 15%-30% under drought stress. After drought stress, the stalk break strength, stalk crushing strength and puncture strength of different varieties averagely decreased 26.1%, 18.9% and 16.8%, respectively. Meanwhile, obvious differences existed among varieties, the average reduction of ‘Luoyu 8’ and ‘Zhengdan 958’ was smaller and that of ‘Liyu 16’ and ‘Zhongke 4’ was bigger. The research results showed that the drought resistance of ‘Luoyu 8’ and ‘Zhengdan 958’ was stronger and that of ‘Zhongke 4’ and ‘Liyu 16’ was weaker.