不同粳稻品种群体整齐度的比较分析Ⅳ.不同插秧苗数对品种性状及整齐度的影响

Comparison and Analysis of Different Japonica Variety Population′s Uniformity Ⅳ Influence of Transplanting Different Numbers of Rice Seedlings to Variety Traits and Uniformity

对不同插秧苗数条件下主要性状及整齐度的分析结果表明 ,与丛插 (5苗 /穴 )相比 ,单苗插秧时 ,参试品种均表现单株穗数大幅度减少 ,穗粒数较大幅度增加 ,出穗期明显延迟 ,着粒密度增大 ,产量显著降低 ,而其它性状各品种表现不一。单苗插秧后各性状的整齐度也发生了较大的变化 ,平均变化幅度最大的是单株穗数。各品种的整齐度均明显下降 ,其变化幅度依次为出穗日数、茎高、穗长。

Under the condition of different numbers of transplant rice seedlings,main shape and property and uniformity were analysed.The results showed that:The number of grain per ear in single stern decreased clearly;the heading stage delayed clearly;density of growing grains increased;the yield lowered clearly.But other shape and property are differently in every variety.Transplant rice seedlings in single stem, the uniformity of every shape and property changed greatly in average changing range.The influence to the shape and property and the uniformity under different conditions of the culture was compared and analysed.The resuts showed:The measure of culture clearly influenced the shape and property and uniformity of rice.