硅对小麦幼苗生长及部分生理指标的影响

以洛麦21和同舟麦916为试材,采用水培法研究了不同浓度硅对小麦幼苗株高、根长、生物量及部分生理指标的影响.结果表明,不同硅处理可以促进同舟麦916的生长和生物量的积累,低硅处理促进洛麦21的生物量积累,高硅处理对洛麦21的生长表现为抑制作用;在不同硅浓度处理下,同舟麦916叶绿素含量增加,而洛麦21的叶绿素含量则呈降低趋势;随着硅处理浓度的提高,同舟麦916可溶性糖含量增加、蛋白质含量降低,而洛麦21的可溶性糖和蛋白质含量则随着硅处理浓度的提高而减少.本试验结果表明,不同小麦品种对硅的适应浓度不同,SiO32-浓度为10 mg/L时对小麦的生长具有促进作用.

Effect of silicon on growth and physiological traits of wheat seedling

The effects of different concentrations of silicon on seedlings height, root length, biomass and some physiological indices of wheat under hydroponics culture was studied. Tongzhou wheat 916 and Luomai 21as materials. The results showed that silicon could promote the growth and biomass accumulation of Tongzhou wheat 916, low concentrations of silicon improved the biomass of Luomai 21, but high concentrations of silicon showed inhibition. With the increase of silicon concentration, soluble sugar content increased in Tongzhou wheat 916, while it decreased in Luomai 21. Silicon could improve the chlorophyll content, but reduce the accumulation of soluble protein of Tongzhou wheat 916, whereas it had the opposite effect on Luomai 21. Data also showed that under three treatments, the soluble sugar content of Luomai 21 increased at first then decreased with the treatment time increasing, nevertheless seedling height, root length, biomass and chlorophyll content were prolonged; all the indicators of Tongzhou wheat 916 under the three treatments raised with the seedling growing. The result indicated that different wheat varieties had different adaptation to silicon concentration, and 10 mg/L silicon had promoying effect on ureat growth.