棉 花 学 报     Cotton Science   2008，20(1)：14-18

Variation of Cotton Fiber Orientational Parameters and Its Relation to Fiber Strength at Different Eco-regions
ZHAO Rui-hai¹，GOU Ling¹，HAN Chun-li¹，ZHANG Wang-feng¹，LEI Jun¹，BIAN Dong-cai²
(1.The Key Oasis Eco-agriculture Laboratory of Xinjiang Production and Construction Group of Shihezi University，Shihezi 832003，China；2.School of Material Science and Chemical Engineering of Tianjin Polytechnic University，Tianjin 300160，China)

Abstract：This article explored the variation of cotton fiber orientational parameters and its relation to fiber strength with the method of planting cotton by stages at the sites from the Yellow River Valley to north Xinjiang. The results showed that with the latitude increasing, fiber orientational parameters increased, while fiber strength decreased. With postponing sowing date, fiber orientational parameters increased and tended to largening(widening), while fiber strength decreased. There were same results after cotton cultivar breeded at north Xinjiang was planted in Nangong, Hebei Province, and cotton cultivar breeded at the Yellow River Valley was planted in Xinjiang. There was negative correlation between orientational parameters and fiber strength. The minishing(optimizing) of cotton fiber orientational parameters vailed enhancing fiber strength and the variation of orientational parameters is one of the reasons that changed fiber strength.
Key words：cotton；orientational parameter；fiber strength；sowing date；eco-region
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