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以茎倒伏玉米品种滑986为材料,研究了玉米植株茎秆的主要性状与倒伏的关系。结果表明,茎秆倒伏与茎硬皮穿刺力、垂直压碎力呈极显著负相关,而与穗位高、茎秆重心高度呈显著或极显著正相关,但与株高、茎粗、叶面积、叶夹角、茎秆鲜物质量和干物质量等性状相关性不明显;植株性状之间也存在着一定的相关性;通过通径分析,茎秆硬皮穿刺力对倒伏的直接作用最大,而垂直压碎力和穗位高主要通过硬皮穿刺力而间接影响玉米倒伏,茎秆硬皮穿刺力是影响玉米倒伏的关键因素。
In this study, the main stem traits and lodging of maize stem were studied by using the slippery stem 986 as a material. The results showed that there was a significant negative correlation between stalk lodging and stem crust puncture force and vertical crushing force, but significant and very significant positive correlation with stalk height and stem height, The area, the included angle between leaves, the quality of stem fresh matter and the dry matter quality were not obvious. There was also some correlation between the plant traits. Through the path analysis, the direct effect of stalk crust puncture force on lodging was the largest , While the vertical crushing force and ear height mainly affected the lodging of maize indirectly through the crust puncture force. The puncture power of stalk crust was the key factor that affected maize lodging.