不同浓度铬对黄瓜幼苗生长发育的影响

Effect of Different Concentrations of Chromium on the Growth of Cucumber Seedlings

本试验通过研究铬对黄瓜幼苗的胁迫作用,揭示铬对黄瓜的伤害机制,为预测重金属的污染提供理论依据。以霍格兰营养液中添加不同试验浓度的铬,分别为0、0.5、1、2、5、10 mg/L,研究铬对黄瓜种子的发芽率、幼苗生物量累积的影响。结果表明:低浓度的铬促进黄瓜种子的发芽和黄瓜幼苗的生长发育,高浓度的铬抑制黄瓜幼苗的生长发育,0.5 mg/L铬溶液处理的幼苗长势最佳。

This experiment was to study the stress effect of chromium on the seedlings of cucumber, reveal thedamage mechanism of chromium on cucumber, and provide theoretical basis for forecasting of heavy metal pollution.Chromium solution of six concentrations（0, 0.5, 1, 2, 5, 10 mg/L） was adding to Hoagland＇s nutrient solution, andeffect of chromium on cucumber seed germination and biomass accumulation studied. It was indicated that smallamounts of chromium promoted the germination rate, growth and development of cucumber seedlings, while the highconcentrations of chromium inhabited growth of cucumber seedlings. Under 0.5 mg/L of chromium solution, seed-lings growth was the best.