LIBRO-CONGRESO-CITRUS

S11P03
Evaluation of rootstocks for the ‘Tahiti’ lime in the municipality of Jaíba, Brazil
Alves R.R., Machado D.L.M., Salomão L.C.C., Siqueira D.L., and Silva S.D.R.
Universidade Federal de Viçosa (UFV), Departamento de Fitotecnia, Brazil. lsalomao@ufv.br
The ‘Tahiti’ lime (Citrus latifolia) is one of the most produced fruits in the irrigated region of Jaíba perimeter,
Minas Gerais State. The fruit is for the domestic market and export. However, ‘Rangpur’ lime (C. limonia) is
the only rootstock used in the region. Rootstock diversification is important. The aim of this study was to
evaluate the influence of twelve cultivars of rootstocks on the development and fruit quality of ‘Tahiti’ lime
grown in the municipality of Jaíba (latitude: -20° 15’ 18’’ and longitude: -43° 40’ 28’’). The experimental
design consisted of randomized blocks, with twelve treatments (rootstocks) and five replications. The trees
were evaluated for annual productivity, diameter of rootstock, diameter of the scion, and height and diameter
of the canopy. The fruits were evaluated for color, soluble solids content in the juice, juice titratable acidity,
percentage of juice and levels of vitamin C. The largest productivity was induced by rootstocks ‘Volkamer’
lemon (C. volkameriana), ‘Cleopatra’ mandarin (C. reshni) and ‘Citrandarin 1710’ (C. reticulata x Poncirus
trifoliata). The greatest tree height and best fruit quality were observed in trees grafted on ‘Limeira’ trifoliate
(P. trifoliata), ‘Citradia 1708’ (C. aurantium x P. trifoliata), ‘Cleopatra’ mandarin and ‘Citrandarin 1710’. The
latter two had better potential as alternative rootstocks to ‘Rangpur’ lime.
S11P04
Development and production of ‘Tahiti’ lime IAC-5 grafted on ‘Flying Dragon’ (Poncirus trifoliata
var. monstrosa), grown in high planting densities
Machado D.L.M., Alves R.R., Siqueira D.L., Salomão L.C.C., and Silva S.D.R.
Universidade Federal de Viçosa (UFV), Fitotecnia, Brazil. siqueira@ufv.br
The high citrus density planting using the rootstock ‘Flying Dragon’ (Poncirus trifoliata var. monstrosa) is possible
because it is a rootstock that has the ability to induce dwarfing and produce small size trees, resulting in greater
ease of orchard management and increased productivity of the plantings. Thus, the objective of this work was
to evaluate tree growth and fruit quality of ‘Tahiti’ lime (Citrus latifolia), cultivar IAC-5, grafted on ‘Flying Dragon’
using spacings of 1 m, 1.5 m, 2 m, 2.5 m or 3 m between trees in the row by 6 m between tree rows. The
experiment was conducted in the city of Jaíba (latitude 20° 15’ 18’’, longitude 43° 40’ 28’’) in a randomized block
design with six repetitions. The trees were evaluated for annual productivity, diameter of the rootstock and
of the scion, and height and diameter of the canopy. The fruits were evaluated for juice content, total soluble
solids, titratable acidity and vitamin C. In the period 2010-2012, productivity per hectare in 6 m x 1.5 m spacing
was higher than that of the other spacings. Effect of spacing was minor on fruit quality, being that the spacing
6 m x 3 m provided greater contents in fruit juice, vitamin C and total soluble solids. No significant differences
were found regarding tree growth characteristics between treatments. The results suggest the possibility that
increased planting density will be used in future citrus plantings using ‘Flying Dragon’ rootstock.
S11P05
Effect of shade screen on production, fruit quality and growth parameters in ‘Fino 49’ lemon
trees grafted on Citrus macrophylla and sour orange
Gimeno V. 1 , Simón I. 2 , Martínez V. 1 , Lidón V. 2 , Shahid M.A. 3 , and García-Sánchez F. 1
1 Centro de Edafología y Biología Aplicada del Segura (CEBAS), Plant nutrition, Spain; 2 Escuela Politécnica Superior de Orihuela (EPSO),
Spain; and 3 University of Sargodha, Pakistan. vicente@cebas.csic.es
Spain ranks as the second-largest lemon fruit producing country in the world and it is one of the largest
exporters. About 80% of the production is located in the arid southeast (Murcia and Alicante). In citrus, it is
known that 50% shade screens reduce leaf temperature and light intensity at midday in summer and spring
periods in these areas, resulting in an increase in the photosynthetic leaf water use efficiency (WUEphy =
ACO2/Eleaf). In this experiment the effect of shading with Aluminet-50 screen (which reduces about 50% of
incident photosynthetically active radiation) on the production, fruit quality, leaf water relations, leaf mineral
XII INTERNATIONAL CITRUS CONGRESS 2012 - 181
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