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Different planting spacings for tangelo Nova

Grant number: 15/18621-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2015
Effective date (End): November 30, 2016
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal researcher:Evandro Henrique Schinor
Grantee:Nataly Alessandra Bellan
Home Institution: Centro de Ciências Agrárias (CCA). Universidade Federal de São Carlos (UFSCAR). Araras , SP, Brazil

Abstract

Brazil is the fourth largest world producer of tangerine, however, Ponkan mandarin (Citrus reticulata) and Murcott tangor (C. reticulata x C. sinensis) represent over 80% of the planted area. With the purpose of increasing the number of citrus varieties cultivated aims to study different planting spacings and fruit thinning to Nova tangelo [C. clementine x (C. paradisi x C. tangerina)]. The plants were grafted onto citrumelo Swingle (Poncirus trifoliata x C. paradisi) and the orchard was installed in Capão Bonito city, São Paulo State, in 2009, in a completely randomized block design with four replications and plots consisting of 12 plants arranged in three lines, using the two center for evaluation. Five spacing will be studied: 1.5; 2.0; 2.5; 3.0 and 3.5 m between plants and 6.0 m between lines. Will be assessed height, diameter and volume of the tree canopy, as well as fruit production (kg plant-1), production efficiency (kg m-3 fruit cup) and productivity (kg ha-1). The fruit thinning will be evaluated within each spacing, with three treatments: control, 25 and 50% of thinning performed after physiological fruit drop (December/January). At the time of maturity, the fruits will be counted, weighed and classified into different calibers. It will also be assessed whether the planting density alters the quality of the fruits and incidence and severity of Alternaria brown spot in fruits. For statistical analysis of the variables measured in this study, the averages will be submitted to ANOVA and compared by Tukey test (5%), through SISVAR program. (AU)

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