NITROGEN AND ORGANIC FERTILIZATION ON GRAPEVINE PRODUCTIVITY IN THE BRAZILIAN SEMIARID REGION

Franciezer Vicente De Lima,Francisco Mickael De Medeiros Câmara,Toni Halan Da Silva Irineu,Vander Mendonça,Francisco Sidene Oliveira Silva

doi:10.1590/1983-21252019v32n113rc

Franciezer Vicente De Lima, Francisco Mickael De Medeiros Câmara + Show 3 more

Open Access

https://doi.org/10.1590/1983-21252019v32n113rc

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Abstract

ABSTRACT Nitrogen fertilization is a limiting factor for grapevine production; its excess or deficiency can cause changes in fruit quantity and quality. Thus, the objective of this work was to evaluate productive parameters of grapevines of the Isabel-Precoce cultivar subjected to nitrogen and organic fertilization in the western semiarid region of the state of Rio Grande do Norte (RN), Brazil. The experiment was conducted at the Experimental Farm of the Federal Rural University of the Semi-Arid Region, in Mossoró, RN, Brazil, during two production cycles. The soil of the area used was classified as dystrophic Red Argissolo (Udult) of sandy texture. The experiment was conducted in a randomized block design with six replications, using a 5×2 factorial arrangement, with 5 nitrogen fertilizer rates (0, 30, 60, 90, and 120 kg ha-1) and two organic fertilizer rates (0, and 20 m3 ha-1 of bovine manure). The production components number of bunches per plant, grape production per plant, grape yield, weight, length and width of bunches, number of berries per bunch, and ten-berry weight were evaluated. The nitrogen rates and organic fertilizer rates used were significant (p=0.05) for all evaluated components. The N rate of 60 kg ha-1 combined with the organic fertilization generated the best results for the analyzed variables. N rates from 60 to 120 kg ha-1, applied singly or combined with organic fertilizer, hindered the production components of the Isabel-Precoce grapevines.

Highlights

The irrigated production of tropical fruits in the West region of the state of Rio Grande do Norte, Brazil, mad this region one of the most dynamic regions of fruit production in the Brazilian Northeast region
Grapevine is one of these species; it has a well-established production in the São Francisco Valley, which is a region that presents very similar conditions to those found in the semiarid region of Rio Grande do Norte
The objective of this work was to evaluate productive parameters of grapevines of the Isabel-Precoce cultivar subjected to nitrogen and organic fertilization in the western semiarid region of the state of Rio Grande do Norte (RN), Brazil

Summary

Introduction

The irrigated production of tropical fruits in the West region of the state of Rio Grande do Norte, Brazil, mad this region one of the most dynamic regions of fruit production in the Brazilian Northeast region. Several other native and exotic fruit species produced in other Brazilian northeastern states have potential in this region, since these states have similar climatic characteristics, well-established production chain for tropical fruits, and possibility of production in the whole year due to their soil and climatic conditions. Grapevine is one of these species; it has a well-established production in the São Francisco Valley, which is a region that presents very similar conditions to those found in the semiarid region of Rio Grande do Norte. Few studies have been carried out on viticulture in the Brazilian semiarid region outside the Sub-mid São Francisco Valley, making it difficult to find detailed information about the benefits and difficulties of producing grapevines under the soil and climatic conditions of the semiarid region to expand this crop production area in the country. N deficiency reduces productivity, N excess decreases fruit quality by stimulating competition between vegetative and reproductive activity of the plant (LORENSINI et al, 2015)

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