UVC辐射对几种农作物种子萌发及幼苗生长的影响

摘要

研究了一定强度的UVC辐射对小麦、玉米和油菜种子萌发及幼苗生长的影响。结果表明：UVC照射玉米5～6h／d、油菜1h／d可促进种子萌芽；UVC照射时间＞8h／d则抑制小麦种子萌芽，照射时间＞6h／d则抑制玉米种子萌芽，照射时间＞4 h／d则抑制油菜种子萌芽；经UVC照射处理后，3种农作物幼苗不同程度地出现生长缓慢、植株矮化、抽叶率降低、茎生长背地、根茎脆弱、根萎蔫变黄等现象。%The influences of a certain intensity of UVC radiation on the seed germination and seedling growth of wheat , maize and rape were researched.The results showed that the germination rate of maize and rape could be promoted when their seeds were exposed to UVC radiation for 5~6 h/d and 1 h/d, respectively.While the seed germination of wheat, maize and rape could be in-hibited by UVC radiation for over 8 h/d, over 6 h/d, and over 4 h/d, respectively.After the seeds of 3 kinds of crops were radia-ted by UVC, their seedlings grew slowly with the dwarfed plants, low leaf development rate, negative geotropism of stem growth, weak root and stem, and wilted and yellow root.