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首页> 外文期刊>Pedosphere: A Quarterly Journal of Soil Science >Effects of Amino Acids Replacing Nitrate on Growth, Nitrate Accumulation, and Macroelement Concentrations in Pak-choi (Brassica chinensis L.)
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Effects of Amino Acids Replacing Nitrate on Growth, Nitrate Accumulation, and Macroelement Concentrations in Pak-choi (Brassica chinensis L.)

机译：氨基酸替代硝酸盐对小白菜生长，硝酸盐积累和宏观元素含量的影响

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摘要

A hydroponic experiment was carried out to determine the influence of replacing 20% of nitrate-N in nutrient solutions with 20 individual amino acids on growth, nitrate accumulation, and concentrations of nitrogen (N), phosphorus (P), and potassium (K) in pak-choi (Brassica chinensis L.) shoots. When 20% of nitrate-N was replaced with arginine (Arg) compared to the full nitrate treatment, pak-choi shoot fresh and dry weights increased significantly (P ≤ 0.05), but when 20% of nitrate-N was replaced with alanine (Ala), valine (Val), leucine (Leu), isoleucine (He), proline (Pro), phenylalanine (Phe), methionine (Met), aspartic acid (Asp), glutamic acid (Glu), lysine (Lys), glycine (Gly), serine (Ser), threonine (Thr), cysteine (Cys), and tyrosine (Tyr), shoot fresh and dry weights decreased significantly (P ≤ 0.05). After replacing 20% of nitrate-N with asparagine (Asn) and glutamine (Gin), shoot fresh and dry weights were unaffected. Compared to the full nitrate treatment, amino acid replacement treatments, except for Cys, Gly, histidine (His), and Arg, significantly reduced (P ≤ 0.05) nitrate concentrations in plant shoots. Except for Cys, Leu, Pro, and Met, total N concentrations in plant tissues of the other amino acid treatments significantly increased (P ≤ 0.05). Amino acids also affected total P and K concentrations, but the effects differed depending on individual amino acids. To improve pak-choi shoot quality, Gin and Asn, due to their insignificant effects on pak-choi growth, their significant reduction in nitrate concentrations, and their increase in macroelement content in plants, may be used to partially replace nitrate-N.
机译：进行了水培试验，以确定用20种单独的氨基酸替代营养液中20％的硝酸盐-N对生长，硝酸盐积累以及氮（N），磷（P）和钾（K）浓度的影响在小白菜（Brassica chinensis L.）的芽中。与完全硝酸盐处理相比，当用精氨酸（Arg）代替20％的硝酸盐N时，小菜的鲜嫩和干重显着增加（P≤0.05），但是当用硝酸盐代替20％的硝酸盐N时，丙氨酸（ Ala），缬氨酸（Val），亮氨酸（Leu），异亮氨酸（He），脯氨酸（Pro），苯丙氨酸（Phe），蛋氨酸（Met），天冬氨酸（Asp），谷氨酸（Glu），赖氨酸（Lys），甘氨酸（Gly），丝氨酸（Ser），苏氨酸（Thr），半胱氨酸（Cys）和酪氨酸（Tyr）的鲜重和干重均显着降低（P≤0.05）。用天冬酰胺（Asn）和谷氨酰胺（Gin）替代20％的硝酸盐N后，鲜嫩和干重均不受影响。与完全硝酸盐处理相比，除Cys，Gly，组氨酸（His）和Arg以外的氨基酸替代处理可显着降低（P≤0.05）植物芽中的硝酸盐浓度。除Cys，Leu，Pro和Met外，其他氨基酸处理的植物组织中的总N浓度均显着增加（P≤0.05）。氨基酸也影响总磷和钾的浓度，但效果因单个氨基酸而异。为了提高小白菜的苗期质量，Gin和Asn对小白菜的生长影响不显着，硝酸盐浓度的显着降低和植物中大型元素含量的增加，可用于部分替代硝酸盐N。

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