无土栽培下酸铝耦合对银杏生长的胁迫效应

The Effects of Acid and Aluminum on Ginkgo Growth under the Soilless Culture

本试验采用U207均匀设计方案,通过无土栽培方法研究酸铝耦合处理对银杏幼株生长的效应。结果表明,在pH 4.5～5.5范围内,能耐铝(AlCl3)浓度可达0.4 mmol/L,而高浓度(0.8～1.2 mmol/L)的铝对银杏有毒害作用;pH高于5.0时,提高培养液中铝浓度对银杏生长无明显影响。总之,酸铝耦合加剧对银杏植株的毒害作用,尤其对根系的伤害更为明显,甚至导致烂根死根,从而使地上部停止生长。

The effects of Ginkgo growth was studied under the coupling treatment of acid and aluminum （A1） by applying U207 even experimental design and soilless culture. The results showed that Ginkgo could grow normally at the concentration of Al^3＋ of 0.4 mmol/L and below in the range of pH 4.5 - 5.5, while it could be damaged under the high concentration of Al^3＋ within 0.8-1.2 mmol/L. On other hand, different concentrations of Al^3＋ caused no effect on Ginkgo growth when the pH was higher than 5.0. In a word, Ginkgo growth would be affected especially root system by the coupling treatment of high concentration of Al^3＋ and low pH with the roots got dark and the new roots reduced, even died or rotted, and the planflet would stop to grow.