以浚单29、浚单3136、浚单509为材料，通过对不同日龄花丝人工授粉，收获后统计3个品种的穗长、穗粗、秃尖、百粒重、穗粒数和穗粒重。结果：随着花丝日龄的增大，穗粗和百粒重呈下降趋势；穗长先增加，后水平波动，最后快速下降；秃尖在第1天最长，到第4天降到低谷；穗粒数和穗粒重变化相似，先上升，第4天达到峰值后缓慢下降，第10天后下降较快。在对各性状的相关系数分析后发现穗粒数与穗粒重相关性最大。结论：以自然授粉为参照，三品种在吐丝后的第4天花丝活力最高，吐丝后第6天左右花丝活力仍与对照相当。花丝日龄会影响穗行数，授粉日龄越小穗行数越多。
英文摘要:
Taking Xundan 29, Xundan 3136 and Xundan 509 as materials, hand pollinating the silks of different days, we took statistics on the ear length, the ear diameter, barren tip, 100 grain weight, spike grain number and spike grain weight after harvest. We found that: with the increasing of the silk age, the ear diameter and 100 grain weight showed a downward trend; the ear length increased at first, then fluctuated horizontally, and declined rapidly at last; the barren tip of the group which was pollinated at the first day after silking was longest , while the barren tip of the group which was pollinated at the fourth day after silking was shortest; spike grain number and spike grain weight showed a upward trend at first, peaked at the fourth day, then declined slowly, and decline became fast after the tenth day. The correlation coefficient analysis among all the traits showed that the spike grain number had a maximal relationship with the spike grain weight. As the conclusion of this study, the silks were most active at the fourth day after silking , the silk activity still kept similar to the comparison of natural pollination at the sixth day; the number of rows per ear was affected by the age of the silks, the earlier the silks were pollinated , the more the number of rows per ear was.
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