Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish
Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish
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DOI：
10.3390/horticulturae7120525
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发表时间：
2021-12-01
期刊：
影响因子：
3.1
通讯作者：
Suzuki, Takahiro
中科院分区：
文献类型：
--
作者：
Sakamoto, Masaru;Komatsu, Yoshiki;Suzuki, Takahiro
在水培法中，矿质养分的持续供应对植物生长至关重要。然而，营养成分丰富的条件也增加了植物中的硝酸盐含量，这可能对人体健康有害。本研究通过改变水培液中营养物去除的时间，研究了营养物缺乏对水培萝卜生长和成分组成的影响。将14 d的萝卜植株转入4个不同的营养条件，分别为14 d营养缺乏（WW）、14 d营养充足（NN）、最后7 d营养缺乏（NW）和前7 d营养缺乏（WN）。处理后，NW植株的主根生长与NN植株相似。与此相反，西施植物显著降低了主根生长。WW植株降低了地上、主根重量和水分含量。NW和WW植株主根硝酸盐含量降低。WW植株的总酚含量较低，抗坏血酸和糖含量较高。这些结果表明，幼龄阶段营养矿物质的吸收对萝卜主根的生长至关重要。营养缺乏管理是调节萝卜生长和组成的最有效工具之一。
In hydroponics, a continuous supply of mineral nutrients is essential for plant growth. However, constitutive nutrient-rich conditions also increase the nitrate content in the plants, which can be harmful to human health. Here, we investigated the effect of nutrient deficiency on the growth and component composition of hydroponic radish by changing the timing of nutrient removal from the hydroponic solution. Radish plants that were 14 days old were transferred to four different nutrient conditions for 14 days: nutrient deficiency for 14 days (WW), full nutrient for 14 days (NN), nutrient deficiency for the last 7 days (NW), and nutrient deficiency for the first 7 days (WN). After the treatments, the NW plants had similar taproot growth to NN plants. In contrast, the WN plants significantly reduced taproot growth. The WW plants reduced the shoot and taproot weight and their water contents. The nitrate content in the taproots was reduced in the NW and WW plants. The WW plants contained lower total phenol and higher ascorbic acid and sugar contents. These results suggest that the uptake of nutrient minerals at the young growth stage is important for the growth of radish taproot. Nutrient deficiency management can be one of the most effective tools for regulating radish growth and composition.