Abstract:

【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.

Key words: colored fiber cotton, macroelement, cellulose, flavonoid, fiber quality