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Fertigation with copper in beet crop in a semi-arid region/Fertirrigacao com cobre na cultura da beterraba em regiao semiarida

Copper is an essential element for beet; however, it needs to be made available in adequate quantities since this nutrient, which is a heavy metal, can cause toxicity to plants and/or humans. This study aimed to evaluate the agronomic performance of beet fertigated with copper in a semi-arid region...

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Published in:Revista brasileira de engenharia agrĂ­cola e ambiental 2024-03, Vol.28 (3), p.1
Main Authors: Costa, Romualdo M. C, Grangeiro, Leilson C, de Lima, Renner B, Pereira, Natali A. E, da Costa, Joao P.N, Alves, Anderson A, Bezerra, Larisa R.F.C, de Lacerda, Rodolfo R.A, da Sa, Francisco V.S, Fernandes, Bruno C. C, das Chagas, Paulo S.F
Format: Article
Language:English
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Summary:Copper is an essential element for beet; however, it needs to be made available in adequate quantities since this nutrient, which is a heavy metal, can cause toxicity to plants and/or humans. This study aimed to evaluate the agronomic performance of beet fertigated with copper in a semi-arid region of Brazil. Two experiments were carried out in complete randomized blocks, with five treatments (0,1.5, 3.0, 4.0, and 6.0 kg [ha.sup.-1] of copper) and four replicates. In 2019, the copper content was within the adequate range for beet. In 2021, fertigation with copper above 0.8 kg [ha.sup.-1] led to contents in the phytotoxicity range, which may explain the reduction in total and tuberous root dry mass accumulation. Fertilization with copper increased marketable yield in 2019 (17.321 [ha.sup.-1] at the dose of 3.9 kg [ha.sup.-1] of copper), while, in 2021, there was no fit of the equations. Copper fertilization altered the tuberous root pH but did not influence the other tuberous root quality components. Plants fertilized with copper accumulated more copper in the leaves than in the tuberous root, with a maximum accumulation of 6.0 kg [ha.sup.-1] of copper in 2019 and 2021. Fertilization with 3.9 kg [ha.sup.-1] suits soils with low copper content. Key words: Beta vulgaris, heavy metal, micronutrient, postharvest O cobre e um elemento essencial a beterraba, no entanto, e necessario disponibiliza-lo em quantidade adequada uma vez que esse nutriente, que e um metal pesado, pode causar toxicidade as plantas e, ou, ao ser humano. Esta pesquisa teve como objetivo avaliar o desempenho agronomico de beterraba fertirrigada com cobre em uma regiao semiarida do Brasil. Foram conduzidos dois experimentos em delineados em blocos casualizados ao acaso, com cinco tratamentos (0, 1.5, 3.0, 4.5 e 6.0 kg [ha.sup.-1] de cobre) e quatro repeticOes. Em 2019, o teor de cobre estava dentro da faixa adequada para a beterraba. Em 2021, a fertirrigacao com cobre acima de 0.8 kg [ha.sup.-1] proporcionou teores na faixa de fitotoxicidade, o que pode explicar a reducao no acumulo de massa seca total e de raizes tuberosas. A adubacao com cobre aumentou a produtividade comercial em 2019 (17.32 t [ha.sup.-1] na dose de 3.9 kg [ha.sup.-1] de cobre) enquanto que, em 2021, nao houve modelo ajustado. A adubacao alterou o pH da raiz tuberosa, mas nao influenciou nos demais atributos de qualidade pos-colheita da raiz tuberosa. Plantas adubadas com cobre acumularam mais cobre nas folhas do que na ra
ISSN:1415-4366
DOI:10.1590/1807-1929/agriambi.v28n3e276908