Amony the quality characteristics,changes of span length of 2.5% fibre and Micronaire between years are not obvious enough to reach significant level. But changes of fiber strength,elongation and uniformity between years were significant at 0.01 level.

• 在纤维品质指标中 ；纤维 2 .；5%25的跨距长度、麦克隆值年度间变化较小；未达到显著水平；而比强、长度整齐度和伸长率则年度间变化较大；达到了极显著水平