Effect of selenium applications on the selenium accumulation and yield on several kinds of vegetables
2007
Wang Jinmin | Zhao Zhizhong | Duan Bing
chinois. 以青花菜、胡萝卜和大蒜为试材，叶面喷施不同质量浓度的Na2SeO3，每种蔬菜均设5个Na2SeO3喷施水平，其质量浓度分别为0.1～100 mg/L，0.5～500 mg/L和0.5～1 000 mg/L，蔬菜收获后测定其中全硒、有机硒和无机硒的含量及蔬菜产量。结果表明，叶面施硒可以显著提高各蔬菜中全硒、有机硒和无机硒的含量，有机硒转化率随硒质量浓度的提高而增加；3种蔬菜均喷施质量浓度为100 mg/L Na2SeO3时，以青花菜有机硒富集最高，为对照的135.7倍；除在Na2SeO3质量浓度≤10 mg/L时大蒜产量和Na2SeO3质量浓度为0.1 mg/L时青花菜产量有所增加外，其余Na2SeO3质量浓度均与各蔬菜产量呈负相关。综合分析认为，既有利于有机硒富集又不致产量降低的Na2SeO3叶面喷施浓度以不超过0.5 mg/L为宜。
Afficher plus [+] Moins [-]anglais. The experiment was carried out by spraying selenium (Na2SeO3) of difference quality concentration on the leaves of broccoli, carrot and garlic with in which five treatments with three ranges of quality concentration of 0.1-100 mg/L, 0.5-500 mg/L and 0.5-1 000 mg/L, respectively, were designed for every vegetable. The contents of total Se, organic Se and inorganic and yields of vegetable were analyzed after harvest. The results showed that blade application selenium can increase the content of total Se, organic Se and inorganic Se of tested vegetable. With the increasement of application rate of Se, the transformation rate of organic Se went up. The highest accumulation of organic Se was broccoli, which was 135.7 times of the control group, among three vegetable with 100 mg/L of Na2SeO3. Se application decreased the kinds of vegetables yield compared with control group except Se concentration ≤10 mg/L on garlic and 0.1 mg/L on broccoli. Comprehensive analysis of the effects of Se application on the selenium accumulation and yield indicated that the appropriate application concentration of Se should not be more than 0.5 mg/L.
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