【摘要】 为探究硒对紫色马铃薯生长及光合特性的影响,采用水培法,以马铃薯品种黑美人为试材,以叶面喷水为对照,分别用稀释50,100,200倍的生态纳米硒溶液(硒原液浓度为1 500 mg/kg)对马铃薯进行叶面喷施处理。结果表明:适宜浓度的生态纳米硒能够提高紫色马铃薯植株的生物量、根系活力、叶绿素含量、净光合速率、蒸腾速率、水分利用率和气孔导度,且100倍生态纳米硒的效果最为显著。结论为叶面喷施生态纳米硒能显著促进紫色马铃薯的光合作用和生长发育,进而改善其经济性状。更多还原

【Abstract】 To explore the effects of selenium on the growth and photosynthetic characteristics of purple potatoes,we performed this study using the ‘black beauty’ potato cultivar as the experimental material.Treatments included four foliar-spraying treatments of three ecological nano-selenium levels(50,100 and 200 times diluted solutions of 1 500 mg/kg original selenium)and one control group(spraying with the distilled water) under hydroponic cultivation.The results showed that the ecological nano-selenium with appropriate concentration could improve the biomass,root activities,chlorophyll contents,net photosynthetic rates,transpiration rates,instantaneous water use efficiencies and stomatal conductances of purple potatoes,with the most notable improvements in the 100 times of diluted solution.These results indicated that foliar-spraying nano-selenium could significantly promote the photosynthesis and growth of purple potatoes,and thus improve their economic properties.This study provides theoretical bases for the selenium-rich cultivation of purple potatoes based on hydroponic technology.更多还原