| 玉米秸秆抗根倒伏强度检测方法 |
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| 引用本文： | 李伟,吴科斌,陈艳军,张俊雄,李建生.玉米秸秆抗根倒伏强度检测方法[J].农业机械学报,2012,43(43):66-69. |
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| 作者姓名： | 李伟 吴科斌 陈艳军 张俊雄 李建生 |
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| 作者单位： | 中国农业大学;中国农业大学;中国农业大学;中国农业大学;中国农业大学 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助项目（2006AA100103）和国家玉米产业技术体系资助项目（nycytx-02） |
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| 摘 要： | 研究了玉米秸秆抗根倒伏强度检测方法并设计了相应的检测仪。将玉米秸秆简化为悬臂梁力学模型，以植株的最大垂直拔根阻力作为衡量玉米秸秆抗根倒伏强度的参数。设计了由螺旋机构、活动三角架平台、夹具和数字显示仪等组成的玉米秸秆抗根倒伏强度检测仪。采用手轮对螺旋机构施力的方式，使操作者施加的力仅为被测量值的1/97；夹具采用双重夹紧装置以适应不同直径的玉米秸秆。试验表明，玉米秸秆的最大垂直拔根阻力与根倒率之间存在着负相关性。
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| 关 键 词： | 玉米秸秆 根倒伏 垂直拔根阻力 |
Strength Evaluation of Root Lodging Resistance in Maize Stalk |
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| Li Wei,Wu Kebin,Chen Yanjun,Zhang Junxiong and Li Jiansheng.Strength Evaluation of Root Lodging Resistance in Maize Stalk[J].Transactions of the Chinese Society of Agricultural Machinery,2012,43(43):66-69. |
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| Authors: | Li Wei Wu Kebin Chen Yanjun Zhang Junxiong and Li Jiansheng |
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| Institution: | China Agricultural University;China Agricultural University;China Agricultural University;China Agricultural University;China Agricultural University |
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| Abstract: | A method of evaluating strength of root lodging resistance in maize stalk was developed. It constructed a mechanical model of cantilever beam to describe maize stalk. The maximum vertical root-pulling resistance was used as a measurand for evaluating the strength of root lodging resistance in maize stalk. A measuring instrument was designed which consisted of a screw mechanism, an activities tripod platform, a gripper and measurement parts. Force which was transferred to the screw mechanism with the help of a hand wheel was only 1/97 of the maximum vertical root pulling resistance. The gripper with two different devices could clamp most of the maize stalks with different diameters. Field experiments showed a significant negative correlation existed between maximum vertical root-pulling resistance and root lodging. |
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| Keywords: | Maize stalk Root lodging Vertical root-pulling resistance |
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