Abstract
To study selenium (Se)-enriched characteristics of maize in Ziyang area and to select cultivars, six cultivars were planted on three different soils with high-Se, middle-Se and low-Se. The Se content of grain, stalk & leaf and cob were tested separately, and the relationship between Se content in soil and the capability of Se-enrichment in different organs of six cultivars were analyzed. The result showed that the Se content of maize organs is positively correlated with the Se in soil. Meanwhile, on the soil with different Se content, the trends of Se-enriching capacity in different organs of maize cultivars were as follows: stalk & leaf > grain > cob. Further comparison of the ratio of the Se content of various organs to the Se content of soil showed that, the maize planted on the middle-Se soil has the highest capability of Se-enrichment. Considering the biomass, the accumulation of Se in the grains of sweet maize Shaan K512 and waxy maize Shaan K818 were relatively higher. This study has implications for Se-rich maize and comprehensive utilization of Se in Ziyang.
Highlights
Selenium (Se) is an essential micronutrient for human health
The selenium content in the low-Se area is less than 0.125 mg/kg, which is much lower than the international average soil Se content (0.4 mg/kg) [4]
As Se-rich agricultural products are beneficial to human health, people increase the Se content by foliar application, seed soaking and seed dressing with selenium fertilizer [5,6], but there are few reports about natural selenium enrichment in agriculture
Summary
Selenium (Se) is an essential micronutrient for human health. The deficiency of Se is closely related to many diseases, such as Keshan disease, white muscle disease, cardiovascular disease and cancer [2]. The distribution of selenium in the world’s soil is extremely uneven. The report of World Health Organization has pointed out that at least more than 40 countries and regions lack Se in soil [3]. In China, 72% of the soil is in Se-deficiency. As Se-rich agricultural products are beneficial to human health, people increase the Se content by foliar application, seed soaking and seed dressing with selenium fertilizer [5,6], but there are few reports about natural selenium enrichment in agriculture
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