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Fruit yield and composition in orange trees cv. 'Lane Late' in response to nitrogen fertilization in Sandy Typic Hapludalf soil

Authors :
Gustavo Brunetto
Cesar Cella
Alcione Miotto
Eduardo Girotto
Felipe Lorensini
Auri Brackmann
Carlos Alberto Ceretta
Márcio Renan Weber Schorr
Vanderlei Both
Vítor Gabriel Ambrosini
Source :
Ciência Rural, Vol 47, Iss 3
Publisher :
Universidade Federal de Santa Maria.

Abstract

ABSTRACT: Little is known about the impact of N fertilization on fruit production and composition in orange groves grown in soils with low or medium organic matter content in Rio Grande do Sul (RS). This study aimed to evaluate how N fertilization of orange trees cv. 'Lane Late' in a sandy soil may interfere in fruit yield and composition of fruit and juice. The experiment was conducted with orange trees cv. 'Lane Late' growing in Sandy Typic Hapludalf soil, in Rosário do Sul (RS). The plants received applications of 0, 20, 40, 60, 80, 100, 120, 140 and 160kg N ha-1. Total N in leaves, number of fruits per plant, yield, fresh weight, fruit diameter, peel thickness, percentage of fruit juice, peel color, juice color, ascorbic acid content, total soluble solids (TSS) and total titratable acidity were evaluated in 2010/2011 and 2011/2012 crops. In the first crop, especially yield, number of fruits per plant, TSS content in fruit juice and ratio decreased with increasing N rate applied. However, in the second crop, the total titratable acidity of the fruit juice prominently increased with the dose of N applied. In both crops, results were highly influenced by rainfall distribution, which affect the plant physiology, soil N dynamics and, consequently, probability of response to N applied and the loss of mineral N in the soil.

Details

Language :
English, Portuguese
ISSN :
16784596 and 01038478
Volume :
47
Database :
Directory of Open Access Journals
Journal :
Ciência Rural
Publication Type :
Academic Journal
Accession number :
edsdoj.7b14b89a4a584ef2a657c58296ac9ace
Document Type :
article
Full Text :
https://doi.org/10.1590/0103-8478cr20140869