Effects of two different selenium fertilizers on accumulation of selenium and heavy metals in rice grains in field trials

Abstract

Selenium (Se) is a nutritionally important micronutrient for humans. The use of Se fertilizers is often the most feasible approach to precisely increase Se contents in rice grains, but the effects of common commercial Se fertilizers on producing Se-rich rice remain to be investigated. In this study, we compared the effects of liquid and granular Se fertilizers on the accumulation of Se and heavy metals in rice grains of four different varieties in field. Results showed that Se accumulation in rice grains was affected by the form of fertilizers, applied concentrations of Se fertilizers, and rice varieties. Liquid fertilizer displayed significantly higher Se transfer efficiency than granular fertilizer, whereas the granular fertilizer had a slightly higher effect on organic Se accumulation. More than 95.5% Se in grains were organic Se, with selenomethionine (SeMet) being the dominant one. The proportion of organic selenocysteine (SeCys2) in grains was significantly higher in treatments with liquid fertilizer. Both forms of fertilizers significantly reduced the accumulation of cadmium, lead, and arsenic. Collectively, our study provides a reference for producing Se-rich rice in a more competitive manner in practice.

Accumulation of Co, Ni, Cu, Zn and Cd in Aboveground Organs of Chinese Winter Jujube from the Yellow River Delta, China

“…It was worth mentioning that foliar fertilization is an important pathway for the improvement of yield and quality of fruits [ 15 , 35 ]. Some foliar fertilizers contain trace elements such as Zn, Se and Ni [ 36 , 37 ]. Therefore, our findings tended to infer that the heavy metals in the above organs of the winter jujube were from both the soil and the foliar fertilizer.…”

“…Its application rate might vary among different orchards leading to a wide range of BAF values. In recent years, foliar fertilizer has gradually become a new hot spot in the study of inhibiting the absorption of heavy metals by crops because of its high solubility, good absorption and obvious effect of alleviating the absorption of heavy metals [ 15 , 35 , 36 , 37 ]. On the other hand, the residual Cu on the leaf surface would be easily brought into the soil by rainfall and further enriched by plants.…”

Effects of increasing dietary sodium selenite and selenium yeast levels on growth performance, meat quality and muscle anti-oxidative capacity of broilers

“…At the same time, Se is also irreplaceable in the body's immune function, and has the effects of enhancing human immunity, anti-aging, and anti-tumor (Nguyen et al, 2022;. Related studies have found that Se supplementation is important for animal and human health as well as for ecological improvement (Liu et al, 2022). Adequate amounts of Se in the organism have an important role in maintaining normal muscle function (Pappas et al, 2012;Chen et al, 2017;Zoidis et al, 2018).…”

Optimization of submerged fermentation conditions for biosynthesis of ergothioneine and enrichment of selenium from Pleurotus eryngii 528

“…The selenoprotein in the diet can be absorbed by the human body after being digested and hydrolyzed into selenomethionine and selenocysteine (Seale et al, 2018). Liu et al (2022) pointed out that more than 95.5% of selenium in grains was organic selenium, and selenomethionine was dominant. Scholars have studied the Selenium enriched Hypsizygus marmoreus as a potential food supplement (Hu et al, 2021).…”