黄豆芽在生长过程中对外源NO_2^-、Fe^(2+)的富集情况

Bean Sprouts in the Growth Process Exogenous NO_2^-, Fe^(2+) Enrichment Case

豆芽是深受广大消费者欢迎的食品,具有较高的营养价值。以黄豆芽为研究对象,介绍了加入外源NO_2^-、Fe^(2+)以后,黄豆芽在在生长过程中对这些离子的吸收率,以及添加这些外源离子对黄豆芽品质的影响。试验结果表明:黄豆芽在生长初期对NO_2^-、Fe^(2+)的吸收率增长较快;生长中期增加缓慢;豆芽成熟以后,吸收率达到稳定值,几乎不再吸收离子。NO_2^-浓度为5μg/mL时,黄豆芽对其的吸收率最小;而低浓度的NO_2^-溶液促进了黄豆芽的生长,高浓度会抑制它的生长,甚至使其腐烂变质停止生长。低浓度Fe^(2+)溶液可以促进黄豆芽生长,且在试验中用浓度为5 mg/L的Fe^(2+)溶液培养黄豆芽时,黄豆芽生长状况与蒸馏水培养下生长情况大致相同;而当溶液浓度为10 mg/L时,黄豆芽对Fe^(2+)吸收率最大,豆芽黄豆芽的生长状况也较好。

Sprouts are welcomed by consumers of food with higher nutritional value. In this paper, bean sprouts as the research object, introduces exogenous NO2-, Fe2＋ after the bean sprouts in the growth process of these ions absorption rate, and add the impact of these exogenous ions on the quality of the bean sprouts. The experiment results show that： bean sprouts in the early growth of nitrite, ferrous ion absorption rate increased rapidly; increase slow growth medium; later sprouts mature,the absorption rate reached a stable value, almost no absorption of ions. When the nitrite concentrations of 5 μg/mL, the absorption rate of bean sprouts its maximum; low concentration of nitrite solution growth, promote a high concentration of yellow bean sprouts inhibit its growth. At low concentrations of ferrous ion solution to promote the growth of bean sprouts,and the concentration of ferrous ions in solution is 5 mg/L, bean sprouts grown under culture conditions with distilled water sprouts grown in similar situations; And when the solution concentration of 10 mg/L, the yellow sprouts for ferrous ion absorption maximum.