大豆在鼓粒期最易发生倒伏,且对产量损失影响很大,倒伏已经成为大豆高产稳产的重要限制因素,为探讨大豆的抗倒伏性与植株形态指标和茎秆力学特性的关系,选用了30个大豆品种为试验材料,在鼓粒期对大豆形态指标和茎秆基部挫折力等力学特性进行测定,研究了大豆株型差异和茎秆力学特性对大豆茎秆抗倒伏倒伏性的影响。结果表明:在大豆鼓粒期,大豆品种的抗倒伏性与株高、鲜重和茎粗均呈现显著负相关,而与茎粗/株高呈显著正相关,茎粗/株高能更好的反映品种的抗倒伏性;随大豆株高的增加,大豆茎秆的挫折力、弯矩和重力矩均增加,并且重力矩对倒伏的影响更大,供试大豆品种中高秆品种的抗倒伏性比矮秆品种差;株高相近的大豆品种的抗倒伏性与茎秆挫折力关系较大,而株高相差较大的大豆品种的抗倒伏性与株型关系密切。 Soybean most prone to lodging in the drum grain stage, and have a great impact on yield loss, lodging has become an important limiting factor for high and stable soybean yield, soybeans to explore the lodging resistance and plant morphology and stem mechanical properties of the relationship between the selection 30 soybean cultivars were used as experimental materials to test the mechanical properties such as the morphological characteristics of soybean and the base frustration of stem at the drumming stage. The effects of soybean plant type and stalk mechanical characteristics on the lodging resistance of soybean stem were studied. The results showed that there was a significant negative correlation between lodging resistance and plant height, fresh weight and stem diameter of soybean cultivars at the stage of druming, but a significant positive correlation with stem diameter / plant height and a good stem / plant height Reflect the lodging resistance of varieties; With the increase of soybean plant height, the frustration, moment and moment of soybean stem increased, and the moment of gravity had a greater impact on the lodging. The lodging resistance of high-stalk varieties Compared with dwarf varieties, the lodging resistance of the soybean varieties with similar plant height had a greater relationship with the stalk frustration force, while the lodging resistance of the soybean varieties with larger difference in plant height was closely related to plant type.