The objective of this trial was to evaluate the influence of the cordon training and trellis, on bud fertility of the grapevine Niagara Rosada in the Region of Dourados, MS, during the period from May to June, 2004. The shoots were collected from 24 vineyards conducted on cordon-training or trellis. The bud fertility index was determined by the following ratios: number of primordia of inflorescence/primary buds, and the total number of buds/compound buds, and by the number of necrosed buds, from the first to the tenth dormant buds on the mature vine cane. The experimental design was complete randomized blocks with 12 repetitions, in a factorial 2x10. The factors studied were the cordon training and the trellis, and the bud position along the cane. The blocks consisted of 12 grapevines conduced on cordon-training and 12 conduced on trellis. The experimental unity consisted of 10 canes. Means were compared by the Tukey test at 5%. It has been concluded that grapevines conducted on the trellis presented higher averages on bud fertility when compared with cordon-training. The bud fertility presented increasing averages from the basis to the terminal portion of the shoot, in both training systems.
Vitis; Niagara Rosada; bud fertility
