The Influence of Mineral Fertilization on Apple Quality

Abstract

The studies the production quality of three varieties of apples, Generos , Florina and Delicios de Voinesti  under the influence of differential nutrition based on macroelements. The nutritive elements came from complex fertilizers (NPK) 120 and 240 kg s.a./ha. The size of the fruits was directly influenced by mineral fertilization and it was established by taking into account two evaluating factors like diameter and average weight. The spore of average diameter apples was between 7.82 - 14.58 mm in Florina variety, 9.4 - 24.02 mm in Delicios de Voinesti variety and 29 - 33.4 mm in Generos variety. The average spore of weight varied according to variety and doses from 1.2 to 1.9 g in Florina variety, 1.5 - 3.2 g in Delicios de Voinesti variety and 3.7 - 5.3 g in Generos variety . The sugar content was between 16.90±0.41 % in Generos variety and 22.10±0.56 % in Delicios de Voinesti variety  . The total acidity is in reverse raport with the sugar content and has the following values: 0.26 % in Delicios de Voinesti variety and 0.58 % in Generos variety.