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Position: Home > Articles > Dynamic Analysis and Comprehensive Evaluation of Crop-Stem Lodging Resistance Transactions of the Chinese Society of Agricultural Engineering 2002,18 (6) 30-31

作物茎秆抗倒伏的力学分析及综合评价探讨

作  者:
袁志华;冯宝萍;赵安庆;梁爱琴
单  位:
河南农业大学
关键词:
抗倒伏;作物茎秆;势能驻值原理;临界力
摘  要:
建立了农作物茎秆的力学模型 ,利用力学理论和方法 ,给出了农作物茎秆临界力的具体表达式 ,该表达式对于多种农作物例如 :玉米、水稻、小麦、谷物等都是适用的。根据该表达式 ,可对农作物的抗倒伏能力进行综合评价 ,临界力越大 ,抗倒伏能力越强。临界力可以作为农作物抗倒伏能力评价的通用指标。对于同一种作物品种 ,种植密度不同 ,或肥力不同 ,其抗倒伏能力不同 ,茎秆系数越小 ,抗倒伏能力越强。茎秆系数可作为同一品种作物间 ,抗倒伏能力的评价指标。文中给出了农作物倒伏与茎秆各物理量之间的关系 ,为作物抗倒品种的选育、收获机械的设计、桔秆的综合利用提供参考。
译  名:
Dynamic Analysis and Comprehensive Evaluation of Crop-Stem Lodging Resistance
作  者:
Yuan Zhihua 1, Feng Baoping 2, Zhao Anqing 1, Liang aiqin (1. Henan Agricultural University, Zhenzhou 450002, China; 2. Xingxiang Education Institute, Xingxiang 453000, China)
关键词:
lodger resistance; crop stem; principle of potential energy; critical force
摘  要:
A dynamic model for crop-stem lodging resistance was established, and a formula about critical force of crop-stem was extracted by using dynamic theory and method. This formula is suitable to several crops, such as maize, rice, wheat, and corn. According to this formula, a comprehensive evaluation regarding crop-stem lodging resistance was obtained. The results showed that the bigger the critical force, the stronger the crop-stem lodging resistance. Critical force is a current physics parameter to evaluate crop-stem lodging resistance. In the same kind of crop, if planting density or fertility of soil is different, the crop-stem lodging resistance will be different. The smaller the value of stem coefficient is, the stronger the crop-stem lodging resistance is. Stem coefficient is a physics parameter that evaluates crop-stem lodging resistance in the same kind of crop. The relationship between crop-stem lodging resistance and physics parameters of crop-stem was inferred. This can provide references for choosing variefies of crop, designing machines an comprehensively utilizing stem.

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