The Effect of Enhanced UV-B Radiation on the Growth of Cotton in Oasis Cotton Field
Abstract: The objectives of this research were to study the influences of enhanced ultraviolet radiation (UV-B, 280 - 320 nm) on physiological indicator, yield and quality of cotton. We set four treatments of 0 w/m2 (R0), 0.5w/m2 (R1), 1w/m2 (R2), 1.5 w/m2 (R3) by increasing artificial UV-B radiation and studied the effect of enhanced Ultraviolet-B radiation on plant height, stem diameter, leaf area index (LAI), apparent injure in leaf, yield and quality of cotton. The results showed that the plant height, stem diameter and LAI had significant correlation with the increasing Ultraviolet- B radiation (P < 0.01), and the difference between R3 and other treatments also had statistically significance (P < 0.01). The apparent injury in leaf of cotton became more serious and the quantity and quality was also at the lowest level as followed. The relationship between UV-B radiation and cotton growth was closer. The higher intensity of UV-B radiation would have more negative effects on cotton growth.
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