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Selenium as an inorganic biostimulant in onion grown in a semi-arid climate

2024; UNIVERSIDADE FEDERAL DE CAMPINA GRANDE; Volume: 28; Issue: 4 Linguagem: Inglês

10.1590/1807-1929/agriambi.v28n4e279061

1807-1929

Laíza Gomes de Paiva, Leílson Costa Grangeiro, Clístenes Williams Araújo do Nascimento, Romualdo Medeiros Cortez Costa, Natali Almeida Evangelista Pereira, Renner Bento de Lima, Bruna de P. Souza, Luiz Henrique de Araujo Carmo, Renata Ramayane Torquato Oliveira, Éric G. Morais,

Selenium in Biological Systems

ABSTRACT The common climatic characteristics in semi-arid regions can cause abiotic stress and be a limiting factor for crops. Under these conditions, the use of beneficial elements such as selenium (Se) is an alternative to mitigate the harmful effects of abiotic stresses and increase yield. Therefore, this research aimed to evaluate the agronomic performance of onion grown in a semi-arid region under the application of Se. A field experiment was performed in a randomized block design, where five doses of Se (0, 15, 30, 45, and 60 g ha-1), by foliar application, were tested on two onion hybrids (Andrômeda and Rio das Antas). Growth, nutritional and yield variables were analyzed. Se increased the height and accumulation of dry mass in onion plants, with a maximum at the 60 g ha-1 dose of Se, the same dose at which the highest commercial (78.15 t ha-1) and total (86.03 t ha-1) bulb yields were obtained in Rio das Antas; however, for Andrômeda, there was no effect of Se on yield. Applied Se doses also increased the content of this element in the bulbs. Despite increasing bulb yields only in the Rio das Antas hybrid, 60 g ha-1 of Se is recommended for onions due to its effects on plant growth and the biofortification of bulbs with Se.