青海高原富硒区土壤硒含量对蔬菜营养品质的影响

Effect of Selenium Lontent on Vegetable Quality in Selenium-Rich Area of Qinghai

为综合利用富硒资源,提高青海省主要蔬菜产品附加值,通过分析青海富硒区土壤硒含量与5种主要蔬菜的总硒、部分矿质元素及可溶性糖和VC含量,研究土壤不同硒水平对蔬菜硒吸收及营养品质的影响。结果表明:青海富硒区土壤硒含量为100.00~563.00μg·kg^(-1),其中达到足硒及富硒水平土样分别为76.53%和18.88%;大蒜采样区土壤硒含量相对较高,甜菜采样区土壤硒含量相对较低。蔬菜硒含量范围为11.00~340.94μg·kg^(-1);大蒜中总硒含量最高,平均含量高达170.40μg·kg^(-1),萝卜总硒平均含量最低为73.00μg·kg^(-1)。该区域蔬菜90.63%达到足硒水平,70.31%达到富硒水平。测试样品蔬菜的Ca、Mg平均含量均高于全国平均水平。土壤及蔬菜硒含量与营养品质间未呈明显的相关性。

In order to improve the added value of the main vegetable products in Qinghai province,it is a comprehensive utilization of selenium resources.Through the analysis of Qinghai selenium-rich soil selenium content and 5 kinds of main vegetables corresponds to the total selenium,part of the mineral elements and soluble sugar and VC content,the effects of soil selenium levels on selenium absorption and nourishment quality of vegetables were researched.The results showed that the Qinghai selenium-rich soil selenium content in the range of 100.00~563.00μg·kg-1,among them,the soil samples of sufficient selenium and rich selenium were 76.53%and 18.88%respectively.Soil selenium content of garlic sampling area was relatively high,beet sampling area was relatively low.Vegetables selenium content in the range 11.00~340.94μg·kg-1,the average content of the total selenium content of radish was 73.00μg·kg-1.90.63%of the vegetables in the region reached the level of sufficient selenium,and 70.31%reached the level of selenium enrichment.The average content of Ca and Mg was higher than the national average.There was no significant correlation between selenium content of soil and vegetable and nutritional quality.