硅对水培大蒜生长和生理特性的影响

以金乡白皮蒜为试材，设置5 个硅水平（0、0.75、1.50、2.25、3.00 mmol·L^-1），探讨了硅对水培大蒜根系生长、
光合特性及产量的影响。结果表明：在0～3.00 mmol·L^-1 硅浓度范围内，大蒜的根系生长量、植株鲜质量、蒜薹鲜质量、
鳞茎鲜质量及根系活力均随硅浓度增加呈先升高后降低的趋势，当硅浓度1.50 mmol·L^-1 时最高；同时叶片中色素含量、净
光合速率和气孔导度也随着硅浓度增加呈先升高后降低的趋势，当硅浓度1.50 mmol·L^-1 时最大；蒸腾速率变化趋势则恰好
相反，硅浓度1.50 mmol·L-¹ 时最低，比不施硅处理降低了17.78%。

Effects of Silicon in Nutrient Solution on Garlic Growth and Its Physiological Characteristics

'Jinxiangbaipisuan’ was taken as experiment material investigate the effects of silicon on root
growth，photosynthetic characteristics and yield of hydroponics cultured garlic（Allium sativum L.）. Five
different silicon levels（ 0，0.75，1.50，2.25，3.00 mmol·L^-1） were designed. The results showed that the root
system growth，fresh weights of garlic plant，bolt and bulb，and root system activity all rose with the increase of
silicon concentration from 0 to 1.50 mmol·L^-1，but fell while the silicon content reached 1.50 mmol·L^-1. At the
same time，the pigment content，net photosynthetic rate and stomatal conductance of leaves also increased first
and then decreased with the increase of silicon content from 0 to 3.00 mmol·L^-1．They reached the highest when
silicon concentration was 1.50 mmol·L^-1. While the change trend of transpiration was just the opposite. It reached
the minimum value at Si 1.50 mmol·L^-1 and was reduced by 17.78% compared with the treatment without silicon.