绿洲棉田UV-B辐射增强对棉花生长发育的影响

The Effect of Enhanced UV-B Radiation on the Growth of Cotton in Oasis Cotton Field

摘要: 在大田试验条件下，研究UV-B辐射增强对棉花生长发育的影响。通过人工增加对棉花UV-B辐射，设置4个处理，每个处理的辐射剂量分别为0 W/m² (R0)、0.5 W/m² (R1)、1.0 W/m² (R2) 和1.5 W/m² (R3)，研究了UV-B辐射增强对棉花株高、茎粗、叶面积、叶片表观伤害、产量和品质的影响。结果表明：随着UV-B辐射增强，R1、R2和R3处理组的株高、茎粗、叶面积分别与对照达到了极显著水平(P < 0.01)，R3与各个处理之间差异均达到了极显著水平(P < 0.01)；棉花叶片可见伤害症状越来越严重，各个处理的棉花产量和品质显著低于对照。UV-B辐射增强使棉花形态、产量和品质之间存在密切的直接关系，UV-B辐射强度越大对棉花的影响就越大。

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.