Selenium fertilization strategies for bio-fortification of food: an agro-ecosystem approach

Determining the fate of selenium in wheat biofortification: an isotopically labelled field trial study

“…Despite the wide range of application rates employed in cereal crop Se biofortification studies, from <10 to 500 g ha et al 2010, Chilimba et al 2012aGalinha et al 2012;Wang et al 2013); this is also true of herbage sward studies (Whelan 1989;Rimmer et al 1990;Shand et al 1992;Valle et al 2002). It is also widely accepted that crop uptake of selenate (Se VI ) exceeds that of selenite (Se IV ) (Shand et al 1992;Chen et al 2002;Zhao et al 2005;Galinha et al 2012, Ros et al 2016) mainly because selenate is more soluble in soil within the pH range of arable soils (Fleming 1980;Jacobs 1989;Neal 1995) making it more bioavailable (Zayed et al 1998;Li et al 2008;Stroud et al 2010b). Yläranta (1983) observed that application of just 10-20 g ha −1 Na 2 SeO 4 (Se VI ) was sufficient to produce barley grain Se concentrations of 100-200 μg kg −1 , whereas over 100 g ha…”

Selenium speciation and bioavailability in Dutch agricultural soils: the role of soil organic matter

“…3A and B). This finding confirms the results of a meta-analysis of Se fertilizations, showing that organic matter content, acidity and total Se content of the soils only had a minor influence on the effectiveness of Se fertilization (Ros et al, 2016). Nevertheless, in sandy soils, the unit efficiency of Se fertilization tends to have a larger range and a higher mean than that in the clay soils and organic rich soils in both experiments ( Fig.…”

“…The findings in this study correspond to the results of a metaanalysis of Se fertilization that indicated that total Se content, acidity and organic matter content of the soils and crop species only had a minor influence on the effectiveness of Se fertilization (Ros et al, 2016).…”

“…Both soil compaction and irrigation decreased Se uptake in wheat grains, in which soil compaction impedes root growth and restricts nutrient (including Se) uptake, whereas irrigation leads to increased grain yield, therefore dilution of Se in grains, competition between sulphate from the irrigation water and Se, and leaching of Se . In relation to agro-ecosystem properties, the effectiveness of Se fertilization is strongly affected by local agro-ecosystem properties, such as climate and bioavailable Se pools in soil, but only slightly affected by soil properties, such as acidity and soil organic matter content, and total Se content in soil (Ros et al, 2016).…”

Foliar application: from plant nutrition to biofortification

“…Additionally, these studies included roles of nutrients in plant nutrition and then changed to the plant biofortification towards crop production (Singh et al 2016;Bouis and Saltzman 2017;Díaz-Gómez et al 2017). The biofortified crops include mainly zinc (Barrameda-Medina et al 2017), iron (Vasconcelos et al 2017), iodine (Gonzali et al 2017), selenium (Bañuelos et al 2015;Ros et al 2016;El-Ramady et al 2016a, b;Bañuelos et al 2017;Li et al 2017;Sharma et al 2017), manganese (Ullah et al 2016), folate (Strobbe Several ways could be used in delivering nutrients for plants including soil and foliar or spraying methods. Foliar application could be considered one of the most common methods, which used to deliver the needed nutrients to plants in adequate concentrations and improve plant nutritional status as well as increase the crop yield and its quality (Smoleń 2012).…”