UV-B辐射增强对河南省夏直播花生产量及品质的影响

在大田条件下，研究了模拟地表UV-B辐射增强对花生（开农49号）的产量及品质的影响.UV-B辐射设3个水平，即对照、增强20%和增强40%.结果表明：UV-B辐射增强能显著降低花生产量，产量下降的原因主要是由单位面积产量、株荚果数、百仁重减少造成的；花生品质受UV-B影响较为复杂，UV-B增强20%时，花生脂肪质量分数为51.02%，蛋白质质量分数为22.34%，油酸/亚油酸质量比为1.19，较对照组提高了0.02；UV-B增强40%时，花生脂肪质量分数为51.82%，蛋白质质量分数为22.56%，油酸/亚油酸质量比为1.28，较对照组提高了0.11.研究认为，UV-B辐射增强，不足以对花生的品质产生显著影响，这可能与设定的UV-B辐射强度、试验设计方案及花生的品种有关.

Effect of enhanced UV-B radiation on the quality and yield of summer sowing peanut in Henan Province

The influence of enhanced surface ultraviolet-B(UV-B) radiation on yield and quality of peanuts(Kainong 49) were simulated under cropland conditions.Three UV-B radiation treatments,namely control group,enhanced by 20% and enhanced by 40%,were set up based on UV-B level in sunlight.The result showed that UV-B radiation enhancement can reduce the peanut yield significantly,which was due to the reduction of pod number as well as hundred-grain weight.The influence of UV-B radiation enhancement on peanut quality was not significant in this study.When UV-B radiation was enhanced by 20%,fat content and protein content of the peanut were 51.02%,22.34%,respectively,and ratio of oleic acid to linoleic acid was 1.19,which was improved by 0.02 compared with the control group.When UV-B radiation was enhanced by 40%,fat content was 51.82%,protein content was 22.56%,and ratio of oleic acid to linoleic acid was 1.28,which was improved by 0.11 compared with the control group.The research result suggested that the enhanced UV-B radiation was not enough to have obvious impact on the peanut quality,which might be related to the UV-B radiation level,experiment design or peanut variety.