Effects of Different Sowing Dates on the Fiber Quality of Cotton

[Objective] The aim was to study the effects of different sowing dates on fiber quality of cotton.[Method] Taking transgenic hybrid insect-resistant cotton(CCRI29) and ordinary insect-resistant cotton(Xinmian 33B) as materials,the effects of different sowing dates on the fiber quality of cotton were discussed in the paper.[Result] On the whole,the responses of cottons with various genotypes to sowing date were different,namely the fiber quality of middle and lower cotton was more sensitive to sowing date than that of upper cotton,and appropriately early sowing was helpful to improving the fiber quality of middle and lower cotton of CCRI29,especially the middle cotton,while suitable later sowing might help to improve the fiber quality of middle cotton of Xinmian 33B.[Conclusion] The study could provide theoretical foundation for the high yield and quality cultivation of cotton.