EVALUATION OF THE QUALITY OF SOME VINE GENOTYPES WITH TABLE GRAPES IN THE SANDY SOILS CONDITIONS OF SOUTHERN OLTENIA

Abstract

The objective of this study is to present the biochemical composition of 6 table grapes genotypes: Victoria, Prima Cl. 1022, Otilia, Napoca, Transilvania, Splendid, in the conditions of sandy soils in southern Oltenia. The observations were made during 2022-2023 at SCDCPN Dabuleni. The climatic conditions at SCDCPN Dabuleni were favorable for the development of vine culture.The following observations and determinations were made: the soil content in: total nitrogen, extractable phosphorus, exchangeable potassium, organic carbon, pH; the biochemical content of the grapes: total dry matter, water, dry soluble substance, simple soluble carbohydrates, titratable acidity, vitamin C; the weight of 100 grains. The soil content in total nitrogen and exchangeable potassium was reduced, and in extractable phosphorus it was normal. Following the determinations carried out in the period 2022-2023, the best results regarding the quality of the grapes were obtained for the genotypes: Transilvania (21.09% total dry matter, 16% simple soluble carbohydrates, 3.97 g/l H₂SO₄ titratable acidity, 18.6% soluble dry matter), Otilia (19.13% total dry matter, 16.86% simple soluble carbohydrates, 4.97 g/l H₂SO₄ titratable acidity, 19.6% soluble dry matter). The grape varieties with a content of soluble simple carbohydrates higher than 15% were: Otilia (16.86%), Splendid (16.43%), Transilvania (16%).