Avaliação de plantas de Lima Ácida Tahiti e Limão Siciliano em diferentes portaenxertos na fase inicial do desenvolvimento

Abstract

In Brazilian pigeons, the genetic basis is reduced in number of cultivars, either as canopy or exporto, providing great vulnerability of the crop to pests and diseases, also restricting the harvest period.It is widely known that the portagrafx influences the agronomic performance of fruit plants, for the 'Sicilian' lemon tree and the acidic lime that are produced in all regions of Brazil, this relationship is not well understood.The objective of this study was to evaluate the initial agronomic performance of 'Tahiti' and 'Siciliano' lemon tree cultivars on Limão Cravo (Citrus limonia Osbeck), Citrus 'Swingle' (P. trifoliataRaf. X C. paradisi Macf.) and Trifoliata 'EEL' (Poncirus trifoliata Raf.). The experiment was conducted in the didactic orchard of the Agricultural Center of Palma (CAP) at the Federal University of Pelotas, municipality of Capão do Leão, RS. The orchard was implanted in November 2015, with the cultivar 'Tahiti' (Citrus latifolia Tanaka), grafted on the citrus limb (Citrus limonia osbeck) and Poncirus trifoliata (L.) Raf. The cultivar Sicilian canopy (Citrus limon), grafted on Citrumelo 'Swingle' (P. trifoliata Raf. X C. paradisi Macf.) And Trifoliata 'EEL' (Poncirus trifoliata Raf.). The spacing between 6m lines and between 4m plants, totaling a density of 400 ha-1 plants, was used. The experimental design was randomized blocks, each plot being composed of six plants. The height and width of the canopy, the diameter of the trunk of the portagrafx and the cultivar crown were analyzed. In order to cultivate 'Tahiti' acidic canopy it was verified that for 'Trifoliata' canopy height it was superior in all analyzed months, as well as for most canopywidth analyzes. Already for the 'Trifoliata' grafted portal was also superior to 'Lemon Cravo' for stem diameter of graft and stem cultivar. There was no significant difference between Trifoliata 'EEL' (Poncirus trifoliata Raf.) And Citrumelo 'Swingle' treatments (P. trifoliataRaf. X C. paradisi Macf.) At the height of the 'Sicilian' lemon crown. As for crown width trifoliate, it was superior for all analyzed months. The stem diameters of the portagrafx and the canopy behaved similarly, where trifoliate was superior between the months of April 2016 and October 2016, for both canopy cultivars.