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首页> 外文期刊>Acta Horticulturae >Effect of sulfate anions on nitrates accumulation and total Kjeldahl nitrogen content in lettuce plants cultivated in peat-perlite mixture
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Effect of sulfate anions on nitrates accumulation and total Kjeldahl nitrogen content in lettuce plants cultivated in peat-perlite mixture

机译：腐植植物中盐酸植物硝酸盐积聚对硝酸盐积累和总KJELDAHL氮含量的影响

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摘要

Intensive agriculture is characterized by increased use of synthetic nitrogen fertilizers. If the supplied nitrogen fertilizers are excessive, many vegetables, particularly leafy vegetables, accumulate high levels of nitrates. Increased vegetable nitrate content is related to possible implications for health, as nitrate metabolites can cause carcinogenesis, infantile methaemoglobinaemia and possibly even teratogenesis. The aim of the present study was to investigate the effect of sulfate ions on nitrate accumulation and total Kjeldahl nitrogen (TKN) content in lettuce {Lactuca sativa var. crispa 'Lollo Bionda'), as an attempt to suggest possible ways to reduce nitrate levels. Plants were grown in peat-perlite mixture and fertilized by nutrient solutions under glasshouse conditions. Three levels of nitrogen concentrations (100, 200 and 400 mg L1 N) have been applied in combination with three levels of sulfate anions {15,150 and 300 mg L 1 S as SO42). At harvest stage, the fresh weight of leaves, nitrate accumulation, total sulfur concentration and TKN tissue content were determined. As expected, foliar biomass, nitrate accumulation and TKN content were enhanced when nitrogen concentration was increased. However, the increased levels of sulfates (150 and 300 mg L1 S) had no effect on plant weight whereas a decline of nitrate accumulation was observed when sulfate fertilization increased. Moreover, a concentration of 150 mg L1 S caused TKN increase while the reverse was the case for the concentration of 300 mg L1 S. The results of the present study indicate that the enhanced concentrations of sulfates resulted in decreased nitrate accumulation in lettuce leaves. This may be due to interference in the uptake of nitrates by sulfates ions and may be proposed as a possible way to decrease nitrate content in lettuce, resulting in consumer safety.
机译：密集农业的特点是使用合成氮肥的使用增加。如果供应的氮肥过多，许多蔬菜，特别是叶茂脂，积累了高水平的硝酸盐。随着硝酸盐代谢物可引起致癌，婴儿甲基葡萄球菌血症和甚至畸形，增加植物硝酸盐含量与对健康的可能影响有关。本研究的目的是探讨硫酸根离子对莴苣中硝酸盐积累和总Kjeldahl氮（TKN）含量的影响（Lactuca sativa var。 Crispa'Lollo Bionda'），试图建议降低硝酸盐水平的可能方法。植物在泥炭珍珠岩混合物中生长，并在玻璃条件下通过营养溶液受精。三种水平的氮浓度（100,200和400mg L1 n）已与三级硫酸盐阴离子（15,150和300mg L 1）组合施用。在收获阶段，确定叶片的鲜重，硝酸盐积聚，总硫浓度和TKN组织含量。随着预期的，当氮浓度增加时，提高了叶状生物量，硝酸盐积聚和TKN含量。然而，硫酸盐水平增加（150和300mg L1 S）对植物重量没有影响，而硫酸盐施肥增加，则观察到硝酸盐积累的下降。此外，浓度为150mg L1 S导致TKN增加，而浓度为300mg L1 S的情况。本研究的结果表明，增强浓度的硫酸盐浓度导致莴苣叶中的硝酸盐积累降低。这可能是由于硫酸盐离子的硝酸盐摄取的干扰，并且可以提出作为降低生菜中硝酸盐含量的可能方法，导致消费者安全性。

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  • 来源
    《Acta Horticulturae》 |2019年第1期|共7页
  • 作者

    Ch. Karipidis; D. Douma; P. Yfanti;

  • 作者单位

    Technological Education Institute of Epirus Department of Agricultural Technology Arta Greece;

    Technological Education Institute of Epirus Department of Agricultural Technology Arta Greece;

    Technological Education Institute of Epirus Department of Agricultural Technology Arta Greece;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 园艺;
  • 关键词

    nitrate accumulation; Lactuca sativa;

    机译：硝酸盐积聚;乳酸裂变苜蓿;

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