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通过野外调查、样品采集与数据分析,对四川省巴中市各区县代表性作物及产地根系土壤Se元素含量和作物对Se的富集特征进行分析。结果表明,巴中地区平均硒含量为0.165μg/g,高于四川地区土壤平均值。巴中市各县区中土壤平均含硒量最高的是通江县(0.0189μg/g),最低的是南江县(0.0072μg/g)。不同土壤类型硒含量大小顺序为黄棕壤>黄壤>紫色土。不同耕作程度土壤硒含量大小顺序为水耕>旱作>水旱。经检测,巴中富硒作物有木耳、茶叶、水稻。茶叶对硒的富集系数最大,为24.48%,其次是水稻,为14.31%,番茄富集系数最小,为0.24%。巴中市代表性作物中木耳、茶叶、水稻属于富硒作物,茶叶、水稻对硒富集能力最强,可在巴中富硒地区广泛种植以获得富硒农产品。
Through the field investigation, sample collection and data analysis, Se element content of the soil and the enrichment characteristics of Se in the soil of the representative crops and the origin of each district in Bazhong, Sichuan Province were analyzed. The results showed that the average selenium content in Bazhong was 0.165 μg / g, which was higher than that in Sichuan. The average soil selenium content in all counties of Bazhong was Tongjiang (0.0189μg / g), and the lowest was Nanjiang (0.0072μg / g). Selenium content of different soil types in the order of yellow brown soil> yellow soil> purple soil. The order of selenium content in different tillage degrees was hydroponics> drought> water and drought. After testing, Ba selenium crops have fungus, tea, rice. The enrichment coefficient of selenium in tea was the largest, 24.48%, followed by rice, which was 14.31%. The enrichment coefficient of tomato was the lowest, which was 0.24%. Among the representative crops in Bazhong, edible fungus, tea and rice belong to selenium-enriched crops. Tea and rice have the strongest enrichment ability for selenium, and can be widely planted in Se-rich areas in Pakistan and Pakistan to obtain selenium-enriched agricultural products.