Comportamento da cultivar folha de figo (Vitii labrusca'L) sobre diferentes porta-enxertos de videira

Abstract

The present work was intented to evaluate the behavior ofthe cultivar Folha de Figo on different grapevine rootstocks for the conditions ofCaldas, south of Minas Gerais. The experiment was developed on the Caldas Experiment Farm - MG, belonging to EPAMIG. The completely randomized design (CRD) withfive treatments represented by four rootstocks (Kober 5BB, IAC 313, RR 101-14 andJacquez) was utilized in addition to the ungrafted plant (' Folhade Figo'), four replications and useful plants perplot. Tothe variables - growth ofsarmentun, soluble solids and acidity, the very design was utilized but, in a split plot scheme in time. The weight of prunning wood did not show significam differences among the rootstocks, butto the production, significant differences were found among the grafted treatments and ungrafted plants. In the two crops observed (94/95 and 95/96) a trend forthe rootstocks to induce higher yields and number of stock clusters, being that 'IAC 313' proved to be superior to the others. By means of the growth curve ofsarmentuns, the stock 'Folha deFigo' inthe cycle 94/95 showed increased vigor, induced by the rootstock 'IAC 313' , followed by the ungrafted plant and 'RR 101-14' , with average vigor and finally 'Kober 5BB' and Jacquez' with the poorest vigor. Concerning the production cycle 95/96, year with best cropping conditions (rainfall and fertilization), there were no statistical differences among thetreatments. Bythe data of the production cycle 95/96, it was found that the rootstocks induced a larger leafárea of the stock, when 'IAC 313' once again showed its superiority. As to the soluble solids content, for production cycle 95/96, the rootstock 'RR 101- 14' induced a lower sugar content ofthe stock. The phenological record showed a trend ofthe rootstocks 'RR 101-14' and 'Kober 5BB' induced earliness in sprouting, at the beginning of flowering and "verasion". Under the condictions the studies were conducted, Latosol with low fertility, it followed that use ofrootstocks proved efficient in increasing yield being that the rootstock 'RR 101-14' can come to be the best choose, before the conditions ofCaldas (organic and very fertil soils).