1983—85年间观察了五个小麦品种地上部伸长节间的大、小维管束数目和面积及其与单穗粒数的关系。结果表明,小麦茎节间维管组织的发育状况因节位、品种、年度气候条件等而异。节间大、小维管束之间在数量上呈极显著的负相关(r=-0.4118)。并证实小麦节间大、小维管束数目与面积和单穗粒数之间呈正相关,但其间密切程度有差异。 During 1983-85, the number and area of ​​large and small vascular bundles in the shoots of five wheat cultivars and their relationship to grain number per spike were observed. The results showed that the developmental status of vascular tissue between wheat stems varied with node, variety, annual climatic conditions and so on. Internode large, small vascular bundles showed a significant negative correlation between the number (r = -0.4118). It was confirmed that there was a positive correlation between the number of small and small vascular bundles and the area and the number of grains per spike in the internode internodes, but there were differences in the closeness between them.