A field experiment with double cropping rice was carried out to study the foliar application effects of dicarboxylicdimethylammonium chloride (DDAC) on cadmium (Cd) and arsenic (As) accumulation in rice grains. The results showed that the spraying of DDAC could significantly reduce the accumulation of Cd and As in rice grains. The highest reductions in Cd and As content were observed when 1.5 mmol L−1 DDAC was sprayed, with 49.1% and 27.4% reductions in Cd and As content in early rice grains and 56.5% and 28.1% reductions in Cd and As content in late rice grains, respectively. In addition, the content of calcium (Ca) in rice grains increased significantly after DDAC foliar application, which was also conducive to the synthesis of amino acids such as glutamate (Glu), glycine (Gly) and cysteine (Cys) in rice grains. The results indicated that the foliar spraying of DDAC can inhibit the absorption, transport, accumulation and toxicity of Cd and As in rice grains by increasing amino acid synthesis and regulating the absorption and transport of essential elements.
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机译：以双季稻为原料，开展田间试验，研究二羧二甲基氯化铵（dicarboxydimethylamium， DDAC）对稻谷中镉（Cd）和砷（As）积累的叶面施用影响。结果表明，喷施 DDAC 可显著减少米粒中 Cd 和 As 的积累。当喷施 1.5 mmol L-1 DDAC 时，观察到 Cd 和 As 含量降低最高，早稻谷中 Cd 和 As 含量分别降低 49.1% 和 27.4%，晚稻谷中 Cd 和 As 含量分别降低 56.5% 和 28.1%。此外，叶面喷施DDAC后，稻谷中钙（Ca）含量显著增加，这也有利于稻谷中谷氨酸（Glu）、甘氨酸（Gly）和半胱氨酸（Cys）等氨基酸的合成。结果表明，叶面喷施DDAC可通过增加氨基酸合成和调节必需元素的吸收和转运，抑制稻谷中Cd和As的吸收、运输、积累和毒性。
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