Produção e Comportamento Fenológico da videira ‘Niagara Rosada’ (Vitis labrusca L.) no Norte do Estado do Rio de Janeiro

Abstract

The work was done in particular vineyard Pioneer Site, located in the municipality of Cardoso Moreira, Northern Rio de Janeiro State and will aim to characterize phenological phases, as well as knowing the vegetative and productive behavior of ‘Niagara Rosada’ two pruning times. Settled the experiment in the field of Niagara Rosada (Vitis labrusca L.) on the rootstock ‘IAC 572-Jales’ in spacing of 2.70 x 1.50 m, conducted in trellis system and irrigated by microsprinkler. The same was the evaluation of two production cycles (pruning-harvest), conducted separately in two modules, with the implementation of pruning August 01st 2011 to module A and September 07th 2011 to module B. We used a completely randomized design with 20 replications, each experimental unit consists of a single plant and the results submitted to analysis of variance, with comparison of means by Tukey test at 5% probability. The results showed that under the conditions where the study was conducted, the duration of pruning to harvest varies according to the pruning time. Pruning on 08-01-2011 (A), the cycle length was 121 days, with the accumulation of 1845.5 degree-days and to the prune held on 09-07-2011 (B) cycle lasted 125 days, accumulating a total of 2009.5 degree-days. It was also found that the development of the branches of the pruning vines received on 08-01-2011 (A) was lower than the pruning vines received on 09-07- 2011 (B). While the plant branches of module A reached during the cycle on average 54.2 cm long, 6.5 mm in diameter and 1837 cm² leaf area, the plant branches module B had an average growth of 63.5 cm, 8.7 mm and 3447 cm², respectively. The average yield observed for the two pruning times were 9.41 and 12.47 kg plant-1, allowing to estimate the productivity of 23,643 kg ha-1 for the cycle A and 31,856 kg ha-1 for the production cycle B. This productivity equivalent or even superior to that obtained by vines in the Niagara Rosada traditional regions of Brazil. Since, in the pruning on 08- 01-2011, the fruits showed a content of soluble solids more appropriate