彩色棉纤维中矿质元素含量与纤维品质形成的关系

【目的】探讨彩色棉纤维中大量元素含量与彩色棉纤维品质形成的关系。【方法】选用棕色棉(X008)、绿色棉(S029)和白色棉(Xuzhou142)为材料,对彩色棉纤维发育过程(开花后20—50d)中大量元素(N,P,K,Ca和Mg)、黄酮色素和纤维素以及纤维品质指标进行分析。【结果】(1)彩色棉纤维细胞中纤维素的含量显著偏低,比白色棉降低15%左右;黄酮色素含量较高,比白色棉纤维高4—10倍;大量元素的含量(除K)明显偏高,比白色棉提高1—2倍;(2)相关性分析结果显示,成熟彩色棉纤维的品质指标与纤维中纤维素含量呈极显著的正相关,与纤维中总黄酮含量呈极显著负相关;棉纤维中大量元素N、P和Ca的含量与纤维素含量呈极显著的负相关,与纤维中黄酮色素含量呈极显著的正相关。【结论】彩色棉纤维中N、P和Ca元素含量的提高可能有利于黄酮色素的合成,而黄酮色素的积累使得彩色棉纤维中纤维素含量降低,这可能是引起彩色棉纤维品质偏差的原因之一。

Relationship Between Fiber Macroelement Content and Fiber Quality in Colored Cotton

【Objective】 Colored fiber cotton (Gossypium hirsutum L.) is eco-friendly for the textile industry because the dying process can be omitted and thus reducing the harmful effluent liquor. This experiment was carried out to give more information on the poor fiber quality of colored fiber cotton. 【Method】 Three cotton varieties, brown fiber cotton (X008), green fiber cotton (S029), and white fiber cotton (Xuzhou 142), were used to study the content of macroelement, cellulose, and flavonoid during the development of cotton fiber. 【Result】 Result showed that the cellulose content was 15% lower and flavonoid content was 4-10 times higher in colored cotton fiber than in white fiber cotton; macroelement in colored cotton fiber was 1-2 times higher than in white fiber cotton. Fiber quality properties had a significant positive correlation with fiber cellulose content, but had a significant negative correlation with flavonoid content. N, P and Ca contents had a significant negative correlation with cellulose content and a positive association with flavonoid content, respectively. 【Conclusion】 The results suggested that the higher content of N, P and Ca elements in colored cotton fiber might be necessary for the formation of flavonoid in it, and the higher flavonoid accumulation and lower cellulose content in fiber might be responsible for the inferior fiber quality of colored cotton when compared with the white fiber cotton.