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Revista Brasileira de Fruticultura

Print version ISSN 0100-2945On-line version ISSN 1806-9967

Abstract

VILLAS BOAS, ROBERTO LYRA et al. Nutrients levels of leaf, juice quality and roots fresh weight of orange due irrigation and fertigation. Rev. Bras. Frutic. [online]. 2002, vol.24, n.1, pp.231-235. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452002000100049.

The present work was developed in the Experimental Area of Irrigation of University of Agrarian and Veterinary Sciences of Jaboticabal/Unesp, with the objective of evaluating the effect of the fertigation on the foliar teor of macro and micronutrients, the fresh weight of roots and the juice quality of fruits in an orange "Valência" orchard. The used treatments were: (SI) without irrigation and manuring with solid fertilizer parceled out in four times; (MI-100) micro sprinkler fertigation with 100% of the evapotranspiration; (MI-50) micro sprinkler fertigation with 50% of the evapotranspiration; (G-100) drip fertigation with 100% of the evapotranspiration and (G-50) drip fertigation with 50% of the evapotranspiration. The foliar analysis showed no difference of macro and micronutrients by treatments for this parameter. Total soluble solids was higher in the treatment without irrigation, and fruit juice percent and "ratio" were not affected by treatments with and without irrigation. The fresh weight of roots was higher in the irrigated treatments, but no differences were observed between drippers and micro sprinklers treatments. The root concentration was higher at 10 cm deep and 30 cm from the emissor.

Keywords : fertigation; irrigation; orange; roots; juice quality.

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