摘要
在纤维发育过程中,结晶度和横向晶粒尺寸变化较为明显,随着纤维的发育,晶粒尺寸逐渐增大,结晶度不断提高。不同基因型间,正常成熟纤维的结晶度和横向晶粒尺寸差异很小,与纤维强度相关不显著;而取向参数差异较大,与比强度相关显著。不同开花期棉铃发育的环境温度不同,其纤维结晶度、横向晶粒尺寸和取向参数也不一样。不同的温度条件对α角影响较大,但对φ角和ψ角逐渐降低的变化趋势没有影响。棉纤维超分子结构与纤维品质指标关系密切。正在发育中的纤维细胞结晶度和横向晶粒尺寸均随着纤维细胞的发育逐渐增大,对纤维比强度影响较显著。而成熟纤维,因纤维素沉积已经结束,结晶度和横向晶粒尺寸比较接近,对纤维强度影响较小;取向参数对纤维强力的影响较大,分散角、螺旋角越小,取向度越高,所形成的纤维强度就越高,纤维品质好。今后在育种工作中应结合纤维超分子结构培育高品质棉花品种,有利于提高纤维品质。
During the process of fiber development, crystalline grain size and crystallinity increase continually with fiber development. Orientational separate angle-α gradually augments(widens), orientational distribution angle-ψ and spiral angle-φ gradually reduce(optimize) with fiber development. There are less differences in crystalline grain size and crystallinity of mature cotton fiber between different cotton species and varieties of cotton. And they have not significant correlation with fiber strength. But the orientational parameter has contrary results. There are different super-molecular structures in cotton fiber at the different anthesis date. However, the increasing trend of crystalline grain size and crystallinity is not influenced significantly and neither do orientational distribution angle-ψ and spiral angle-φ. Super-molecular structure has close relation with quality parameters, especially fiber strength. Increasing of crystalline grain size and crystallinity has significant influence to the developing fiber, but has not such influence to mature fiber because the sediment of cellulose has finished. Orientational parameter has significant influence to fiber strength. The less the orientational separate angle-α and spiral angle-φ, the higher the orientation degree, the higher the fiber strength, the better the fiber quality. In the future, we should breed cotton varieties of high quality combining super-molecular structures. In agricultural production proper sowing date should be chosen in order to improve fiber quality by promote crystallinity and crystalline grain size and optimize orientational parameters.
出处
《棉花学报》
CSCD
北大核心
2005年第2期112-116,共5页
Cotton Science
基金
国家自然科学基金项目(39960037)
教育部优秀青年教师资助计划项目(2069)
