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在1987～1988年两年试验中,明确了10个杂交种在不同生育期的植株干重,叶面积和低茎节密度等方面的差异,以及与茎腐病之间的关系。在营养生长阶段,抗、感品种之间在叶片大小、色泽和植株干重等方面均无显著差异。在生育后期的植株干重、叶面积和低茎节密度与茎腐病发病率之间均存在着显著的负相关;各品种间在上述3个性状方面表现出明显的差异。抗病品种的特征一般为叶面积较大、植株干物质积累多,低茎节密度偏高。
In the two years experiment from 1987 to 1988, the differences of plant dry weight, leaf area and low nodule density of 10 hybrids at different growth stages were clarified, and the relationship between them and stem rot was clarified. In the vegetative stage, there was no significant difference in the leaf size, color and dry weight of the resistant and susceptible cultivars. There was a significant negative correlation between plant dry weight, leaf area, low stem density and the incidence of stalk rot in the later growth period. The three cultivars showed obvious differences in the above three traits. The characters of disease-resistant cultivars are generally larger leaf area, more dry matter accumulation and higher density of low stems.