Effect of carbohydrate content on shoot maturation and yield of Palmer mango submitted to potassium fertilization and biostimulant

Mariela Medeiros Lopes Silva,Ana Clara Pimenta Pereira,José Carlos Moraes Rufini,Miriã Cristina Pereira Fagundes,Paulo Antônio Santana Júnior,Willian Gonçalves Souza,Victor Martins Maia

doi:10.33448/rsd-v9i9.7948

Abstract

Mango production in the Brazilian semiarid region has gained prominence in the national scenario due to the high yield and long production period using techniques that help in the main culture stages. The aim of this work was to evaluate the use of two alternative techniques in the production of ‘Palmer’ mango in the vegetative phase. It was evaluated whether commercial potassium-based Multipotássio® fertilizer could be used as an alternative source of potassium nutrient in the maturation process of mango branches, and whether Ascophyllum nodosum algae extract MultiTurbo® biostimulant would be good alternative for fruit production. Two experiments were conducted in the same area, the first experiment with factors represented by four Multipotássio® concentrations (0; 1; 2 and 3 L ha-1) and two assessment periods in the maturation of mango branches and leaves. In the second experiment, conducted in the same area, factors Multipotássio® concentration (0; 1; 2 and 3 L ha-1) and four MultiTurbo® concentrations (0; 0.625 ml ha-1; 1. 25 ml ha-1 and 2.50 ml ha-1) were evaluated. Number and length of panicles, carbohydrate content in branches and leaves, fruiting rate, fruit mass, length and diameter and yield were evaluated. The use of potassium-based fertilizer helps to increase sugar content in 'Palmer' mango branches, which has been increasing in relation to the doses used. Biostimulants result in positive effects on the number of panicles, fruits and yield of 'Palmer' mango.

Highlights

Mango (Mangifera indica L.) is a very important fruit species for the Brazilian economy, which is the sixth largest producer and one of the largest exporters (FAO, 2019)
The aim of this work was to evaluate the use of two alternative techniques in the production of ‘Palmer’ mango in the vegetative phase
The phase preceding floral induction is called maturation of vegetative mango tree branches, which is of paramount importance for production, as it is at this time that plants most feel stress caused by high temperatures and low water availability (Ramírez & Davenport, 2016)

Summary

Introduction

Mango (Mangifera indica L.) is a very important fruit species for the Brazilian economy, which is the sixth largest producer and one of the largest exporters (FAO, 2019). In 2018, the main mango producing states were Pernambuco, Bahia, São Paulo and Minas Gerais (semiarid region), representing 38%, 29%, 15% and 6% respectively (IBGE, 2019) In all these regions, the use of techniques to manipulate mango flowering has become a common practice with the aim of staggering the production of this fruit tree (Ripardo et al, 2009). The phase preceding floral induction is called maturation of vegetative mango tree branches, which is of paramount importance for production, as it is at this time that plants most feel stress caused by high temperatures and low water availability (Ramírez & Davenport, 2016) At this stage, understanding the allocation of photoassimilates between mango leaves and branches may be important to identify the periods of greatest demand for photoassimilates during the reproductive stage. Management techniques are necessary to maintain carbohydrate reserves

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