玉米秸秆抗根倒伏强度检测方法  

Strength Evaluation of Root Lodging Resistance in Maize Stalk

作　　者：李伟[1] 吴科斌[1] 陈艳军[1] 张俊雄[1] 李建生[2] 

机构地区：[1]中国农业大学工学院,北京100083 [2]中国农业大学国家玉米改良中心,北京100094

出　　处：《农业机械学报》2012年第2期66-69,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA100103);国家玉米产业技术体系资助项目(nycytx-02)

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。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.

关 键 词：玉米秸秆 根倒伏 垂直拔根阻力 

分 类 号：S237[农业科学—农业机械化工程]