钼硒配施对小白菜钼硒形态及硒价态的影响

Effects of Co-application of Molybdenum and Selenium on Valence of Selenium and Chemical Forms of Molybdenum and Selenium of Chinese Cabbage

通过盆栽试验研究钼硒配施对水培小白菜钼硒形态及硒价态的影响。结果表明:施硒增加了小白菜地上部及地下部醇溶态和水溶态钼含量,降低了小白菜地上部及地下部盐溶态及醋酸溶态钼的含量,增加了地下部盐酸溶态钼含量,对地上部盐酸溶态钼含量没有太大的影响。施钼对小白菜地上部醇溶态、水溶态硒含量影响不大,增加了盐溶态及盐酸溶态硒的含量,降低了醋酸溶态硒的含量;施钼对小白菜地下部醇溶态硒含量影响不大,降低了水溶态硒的含量,增加了盐溶态、醋酸溶态及盐酸溶态硒的含量。施用四价的亚硒酸钠对小白菜可食部位硒的有机化较为有利,并且施钼也能促进高硒水平下小白菜体内硒的有机化。因此,钼硒配施虽然对小白菜体内钼和硒的各赋存形态有拮抗作用也有协同作用,但是有利于生产富含有机硒的作物。

A solution culture experiment was conducted to determine the effects of co-application of Mo and Se on valence of Se and chemical forms of Mo and Se. The results showed that application of Se increased alcohol soluble and water soluble Mo concentrations in roots and shoots and decreased salt soluble and acetic acid Mo concentrations in roots and shoots of Chinese cabbage. Application of Se had no significant effect on shoot hydrochloric acid Mo concentration, but increased root hydrochloric acid Mo concentration. Application of Mo had no significant effects on shoot alcohol soluble and water soluble Se concentrations, but increased salt soluble and hydrochloric acid Se concentrations and decreased acetate acid Se concentration. Application of Mo had no significant effect on root alcohol soluble Se concentration, but decreased water soluble Se concentration and increased salt soluble, acetate acid and hydrochloric acid Se concentrations. Application of tetravalent Se was conducive to the conversion of inorganic Se to organic Se and application of Mo can promote inorganic Se transform to organic Se in high Se level. Therefore, co-application of Mo and Se had antagonism and synergies on Mo and Se chemical forms, but conducive to the production of organic Se-rich crops.