【摘要】 从“六五”到“九五”期间 ,我国自育陆地棉品种的纤维主体长度或 2 .5 %跨距长度主要集中在2 7～ 30 mm,断裂比强度集中在 1 7～ 2 3c N· tex- 1,麦克隆值集中在 3.7～ 4.9。总体来讲 ,品种品质在纤维长度的阈值、比强度平均值和上限值几个指标上在不断进步 ,麦克隆的阈值呈加宽趋势。与美国棉花品种相比 ,我国品种的纤维长度占有优势 ,比强度略有逊色 ,麦克隆值分布较宽。我们的最大缺陷在于缺少长度在 31 mm以上 ,比强度在2 5 c N· tex- 1以上的陆地棉品种。为满足纺织工业的多种需求 ,迎接日益激烈的国际竞争 ,我们必须及时地调整我们的品种与种植结构 ,尤其要重点培育和推广一批 2 .5 %跨长在 31 mm以上 ,比强度在 2 5 c N· tex- 1以上 ,麦克隆值在 3.7～ 4.2之间的特优质品种更多还原

【Abstract】 In the last 20 years, the 2.5% span length of upland cotton varieties bred in China were mainly within 27～30mm, and the specific strength were mainly within 17～23 cN·tex 1 , and the micronaire were mainly within 3.7～4.9. General speaking, the fiber length, the average and upper value of the specific strength were improved constantly. The threshold of micronaire appeared a broaden tendency. Compared with the cotton varieties bred in the United States, domestic cotton varieties are superior in the fiber length, slightly inferior in the specific strength, and the distribution of micronaire is getting broaden. The most shortcoming of domestic cotton is lacking the upland cotton varieties with 2.5% span fiber length longer than 31mm and specific strength stronger than 25 cN·tex 1 . In order to meet the manifold needs of textile and the increasingly acute international competition, we must adjust the structures of cotton varieties and plantation, especially to breed and plant the varieties which have the 2.5% span fiber length longer than 31mm, the specific strength stronger than 25 cN·tex 1 , and the micronaire between 3.7～4.2.更多还原