Effects of Selenium Fertilizer Application on Yield and Selenium Accumulation Characteristics of Different Japonica Rice Varieties

Abstract

In this study, three japonica rice varieties—Nanjing 9108, Jiahua 1 and Wuyunjing 29—were supplied with different levels of nano-foliar selenium fertilizers (0, 40 and 80 kg Se ha−1) under field conditions. Their rice yield and absorption, accumulation, transportation and utilization of selenium were studied to find suitable selenium-rich rice cultivars and optimal selenium supply levels, while providing references for the development of selenium-rich rice. On an average basis, the Nanjing 9108, Jiahua 1 and Wuyunjing 29 yielded 8755 ± 190, 8200 ± 317 and 9098 ± 72.7 kg ha−1, respectively. The selenium content in polished rice of the three rice varieties is between 0.210 and 0.933 mg kg−1. When 40 g Se ha−1 nano-selenium fertilizer was used, the selenium accumulation in the shoots of Nanjing 9108, Jiahua 1 and Wuyunjing 29 was, respectively, 11.4 g Se ha−1, 12.3 g Se ha−1 and 12.2 g Se ha−1, and when 80 g Se ha−1 selenium fertilizer was applied, the total selenium accumulation of three rice varieties was, respectively, 2.45, 1.75 and 2.40 times that of 40 g Se ha−1 selenium fertilizer. No evident diversity was observed in the selenium transport coefficient and the apparent utilization rate of selenium among the three varieties. The three rice varieties in this experiment had a strong selenium enrichment capacity, and they could be planted as selenium-enriched and high-yield rice varieties. Further, the amount of selenium fertilizer should not exceed 40 g Se ha−1.

Advances in selenium supplementation: From selenium-enriched yeast to potential selenium-enriched insects, and selenium nanoparticles

“…The easiest way to enrich products of plant origin is to use Se fertilizers. Although several studies have been conducted worldwide ( Alfthan et al., 2015 ; Grant et al., 2007 ; McLaren and Clucas, 2006 ; Yan et al., 2021 ; Yuan et al., 2022 ), this strategy is mainly used in Finland, where the problem of Se deficiency in soil is widespread. Biofortification can be carried out in different ways, such as application on leaves ( Graham, 2018 ; Kápolna et al., 2007 ; Ros et al., 2016 ; Xiong et al., 2018 ) or directly in the ground ( Broadley et al., 2010 ; Larsen et al., 2006 ; Ros et al., 2016 ).…”

Highly Selenite-Tolerant Strain Proteus mirabilis QZB-2 Rapidly Reduces Selenite to Selenium Nanoparticles in the Cell Membrane

“…Selenium (Se) is an essential trace nutrient for humans and plays an important role in maintaining body health and preventing diseases ( Dinh et al, 2018 ; Yan et al, 2021 ). However, globally, 0.5–1 billion people suffer from Se deficiency ( Li et al, 2021 ).…”

Effects of Selenium-Enriched Rape Returning Amount on Available Selenium Content in Paddy Soil and Selenium Accumulation in Rice

“…In addition, the selenium absorbed by the selenium-rich rape could be directly used as a source of activated organic selenium for rice to absorb and utilize. However, little was known about the effects of selenium-enriched rape returning on the release dynamics of soil available selenium, and the characteristics of absorption and accumulation of selenium in rice [ 14 ]. Therefore, it is of great significance to study the effects of the amount of selenium-rich rape returned to the field on the available selenium content in soil and the accumulation of selenium in rice.…”