Relationship between Stalk and Cob Mechanical Strength during the Late Growth Stage of Maize (Zea mays L.)

文献类型： 外文期刊

第一作者： Xue, Jun

作者： Xue, Jun;Wang, Qun;Li, Hongyan;Li, Lulu;Xie, Ruizhi;Wang, Keru;Ming, Bo;Hou, Peng;Li, Shaokun;Fan, Yinghu

作者机构：

关键词： maize (Zea mays L.); stalk; cob; mechanical strength; cultivar

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN：

年卷期： 2020 年 10 卷 10 期

页码：

收录情况： SCI

摘要： The stalk strength of maize (Zea mays L.) has a significant effect on stalk lodging and harvesting loss, and the cob mechanical strength affects the grain broken rate in mechanical grain harvesting. Clarifying the relationship between maize stalk strength and cob mechanical strength could provide a theoretical basis for the selection of cultivars with high lodging resistance and high suitability for mechanical grain harvesting. In 2017 and 2018, 64 maize cultivars were planted in four locations to investigate the changes in the bending strength of stalks and cobs using the three-point bending method during the late growth stage. The results showed that, in the late growth stage, with increasing number of days after physiological maturity, the stalk bending strength (SBS) of the fifth internode above the soil gradually decreased, the cob bending strength (CBS) decreased first and then increased, and it was lowest at about six to eight days after physiological maturity. In the same experimental site and sampling period, there was no significant correlation between the SBS and the CBS of different maize cultivars. Cluster analysis showed that most of the investigated maize cultivars showed low stalk strength during the late growth stage. However, a few of the maize cultivars were suitable for mechanical grain harvesting due to their characteristics of high stalk bending strength and moderate cob bending strength during the late growth stage.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序