LEAF GAS EXCHANGE AND FLOWERING OF MANGO SPRAYED WITH BIOSTIMULANT IN SEMI-ARID REGION

Laiane Eugênia Delmondes Mudo; Jackson Teixeira Lobo; Daniel de Almeida Carreiro; Jeferson Antônio Cavacini; Luan dos Santos Silva; Ítalo Herbert Lucena Cavalcante

doi:10.1590/1983-21252020v33n206rc

Authors

Laiane Eugênia Delmondes Mudo Center of Agrarian Sciences, Universidade Federal do Vale do São Francisco, Petrolina, PE https://orcid.org/0000-0002-3721-0592
Jackson Teixeira Lobo Center of Agrarian Sciences, Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0002-6978-083X
Daniel de Almeida Carreiro Center of Agrarian Sciences, Universidade Federal do Vale do São Francisco, Petrolina, PE https://orcid.org/0000-0003-1048-7038
Jeferson Antônio Cavacini Center of Agrarian Sciences, Universidade Federal do Vale do São Francisco, Petrolina, PE https://orcid.org/0000-0002-0627-7962
Luan dos Santos Silva Center of Agrarian Sciences, Universidade Federal do Piauí, Bom Jesus, PI https://orcid.org/0000-0003-4419-6669
Ítalo Herbert Lucena Cavalcante Center of Agrarian Sciences, Universidade Federal do Vale do São Francisco, Petrolina, PE https://orcid.org/0000-0003-1610-1546

DOI:

https://doi.org/10.1590/1983-21252020v33n206rc

Keywords:

Mangifera indica L. Abiotic stress. Shoot maturation. Production system.

Abstract

The aim of the present study was to evaluate the effect of biostimulant containing amino acids and yeast extract on the physiological and reproductive characteristics of mango cv. Tommy Atkins during the shoot maturation phase in tropical semi-arid region. The experimental design consisted of randomized blocks with five treatments, five replications and five plants per plot. Treatments consisted of: T1) two foliar sprays with [biostimulant + KCl] + two foliar sprays with K₂SO₄; T2) No biostimulant and four foliar sprays with K₂SO₄; T3) three individual foliar sprays with biostimulant and one foliar spray with K₂SO₄; T4) two foliar sprays with biostimulant and two foliar sprays with K₂SO₄; and T5) two foliar sprays with [biostimulant + K₂SO₄] + one foliar spray with K₂SO₄. There is a positive effect of the biostimulant containing amino acids and yeast extract on transpiration, internal CO₂concentration, water-use efficiency and number of reproductive and non-differentiated shoots of mango cv. Tommy Atkins cultivated under tropical semi-arid condition, with attenuating effect on plant abiotic stress. For shoot maturation of mango cv. Tommy Atkins, three foliar sprays with biostimulant containing amino acids and yeast extract (10 mL per plant) and one with K₂SO₄ (3%), starting at 45 days after paclobutrazol application (T3), can be recommended.

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