以20个生产上广泛应用的苦荞材料为研究对象,研究了不同材料在茎秆强度和株高、子叶节间、基部1~3节间长和直径等10个植株性状上的差异,采用相关性分析对茎秆强度与性状的关系进行了研究。结果表明,不同材料间在株高、重心高度及基部各节间长度方面差异显著,通辽苦荞显著高于其他材料,西荞1号株高、重心高度最低,分别为41.72、20.21cm;在各节间直径及机械强度方面,以云荞2号表现较高,以通辽苦荞在第1~2节间的机械强度最低;穿刺强度方面,以滇宁1号、云荞1号表现较高。相关分析表明,茎秆抗折力与主茎节数、节间长度呈显著正相关;子叶节间穿刺强度与株高、重心高度相关系数达显著水平,相关系数分别达到0.58、0.54,而其余各节间穿刺强度与各茎秆性状间并未达到显著相关。 Twenty buckwheat materials widely used in production were selected as the research objects to study the differences of 10 plant traits of different materials between stem intensity and plant height, cotyledonary node, base 1 ~ 3 internodes length and diameter. Correlation analysis of the relationship between stem strength and traits were studied. The results showed that there were significant differences among different materials in plant height, center of gravity and internode length. The content of Tartary Buckwheat in Tongliao was significantly higher than that in other materials. The plant height and center of gravity of Xiqiao 1 were the lowest, 41.72 and 20.21cm respectively. In terms of diameter and mechanical strength of each internode, the performance of Yunghugou No.2 was higher, and the mechanical strength of Tongliao tartary buckwheat was the lowest among the first and the second knot; the puncture intensity was higher than that of Yunnong No.1 and Yunghugu 1 high. Correlation analysis showed that there was a significant positive correlation between the bending resistance of stems and the number of nodes and internodes of stems. The correlation coefficient between the puncture intensity of cotyledon nodes and plant height and center of gravity reached a significant level with the correlation coefficients of 0.58 and 0.54, respectively The puncture intensity of each node did not reach significant correlation with each stem trait.