硅对黄瓜种子萌发特性的影响

Effects of Si on the germination characteristics of cucumber seeds

以黄瓜种子为试材,设置0、0.1、1.0、10.0 mmol/L共4个硅酸钠浓度处理,研究了硅对黄瓜种子萌发特性的影响。结果表明:在本试验浓度范围内,低浓度硅酸钠(0.1 mmol/L)对黄瓜种子的发芽势、发芽指数及幼苗主根长和下胚轴长生长有促进作用,但高浓度硅酸钠(1.0～10.0 mmol/L)却对黄瓜种子萌发产生抑制效应;隶属函数综合分析结果显示,0.1mmol/L硅酸钠能刺激黄瓜种子萌发,是较适宜的处理浓度。

This research aimed to reveal the effect of Si on the germination characteristics of cucumber. Si concentrations（0, 0.1, 1 and 10 mmol/L） were set up to study the effect of different treatments on such indexes as the germination rate, the germination potential, germination index, growing vigor index, the length and width of taproot and hypocotyledonary axis in cucumber. The results showed that low concentration （0-0.1 mmo]/L） could increase the germination potential, germination index, the length of taproot and the length of hypocotyledonary axis, hut decrease the growing vigor index and fresh weight. Under the high concentrations （1.0-10.0 mmol/L）, all those germination indexes decreased with the increasing of Si. The result of subordination function showed that 0.1 mmol/L Si concentration had promoted the seed germination and growth of cucumber and was the better treatment concentration.