紫外辐射增强对玉米地上部分与根系生长的影响比较

Effects of enhanced UV-B radiation on the growth of aerial parts and root of maize

在大田试验条件下,运用t检验和紫外线反应指数,分析研究了UV-B辐射增加对玉米(Zea mays L.)地上部分和地下部分生长的影响,结果表明:UV-B辐射增加对玉米成苗期的地上部分和根系都有显著的影响,其中对根系的影响程度显著大于地上部;UV-B辐射增加对玉米苗期(三叶期前)的地上部分有显著的影响,而对根系的生长影响未达到显著水平。对于更全面地了解UV-B辐射增强对农作物的影响及其机理具有一定的参考价值。

Effects of enhanced UV-B radiation on the growth of aerial parts and root of maize（ Zea mays L. ） were investigated under the field experiment in this paper, by t-test and ultraviolet response index. Results show that at the grown stage, the growth of both the aerial parts and root of maize were decreased significantly by enhanced UV-B radiation, and the growth of root was restrained to a greater extent than that of top. The experiment also shows that at the stage of seedling, the growth of stems and leaves of maize were restrained significantly by enhanced UV-B radiation, but the growth of root were influenced to a much less extent than that of the aerial parts. The results indicated that at the grown stage, the growth of maize root was restrained significantly by enhanced UV-B, which might be attributed to the decreased available nutrition from the aerial parts. So this research results will helpful to find out the effect mechanism of ultraviolet on crop.