Influence of planting distances on biological-commercial characteristics of mature cultivar ‘Auksis’ fruit trees on rootstock P60

Investigations of the planting distance effect on the growth, productivity and fruit quality of dwarf apples in 14–15-yearold orchard were carried out at the Experimental Orchard of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, in 2014–2015. The aim of the study was to evaluate the influence of planting distances on the growth, productivity and fruit quality of ‘Auksis’ apple trees on rootstock P60 in the mature 14–15 year old orchard. Fruit trees were spaced at the following distances: 3 × 1.5 m, 3 × 1.2 m, 3 × 1 m and 3 × 0.75 m. Based on the obtained results apple trees spaced at 3 × 1.25 m (2667 trees/ha) could be recommended for achieving high yields and good-quality fruits. If cultivated apple cultivars are not winter hardy or not resistant to bark diseases, apple trees on P60 rootstock could be planted at the distance 3 × 1 m or even more densely in order to achieve as high as possible yield in the young orchard.

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Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v19n10p967-972 ◽

2015 ◽

Vol 19 (10) ◽

pp. 967-972 ◽

Cited By ~ 1

Author(s):

João M. de S. Miranda ◽

Ítalo H. L. Cavalcante ◽

Inez V. de M. Oliveira ◽

Paulo R. C. Lopes ◽

Joston S. de Assis

Keyword(s):

Fruit Quality ◽

Skin Color ◽

Titratable Acidity ◽

Soluble Solids ◽

Economic Viability ◽

Fruit Firmness ◽

Fruit Characteristics ◽

Apple Cultivars ◽

Fruit Mass

ABSTRACTThe production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp firmness, titratable acidity (TA), soluble solids (SS) and the SS/TA ratio, were recorded. Nitrogen doses do not affect fruit quality of studied apple cultivars. The fruit quality attributes are different between apple cultivars: fruit firmness, SS/TA ratio, fruit mass and fruit diameter are superior for Princesa cultivar, while the fruit length for Eva cultivar is superior.

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The effect of nitrogen supply on specific yield and fruit quality of apple (Malus domestica Borkh.)

International Journal of Horticultural Science ◽

10.31421/ijhs/11/2/571 ◽

2005 ◽

Vol 11 (2) ◽

Cited By ~ 1

Author(s):

J. Racskó ◽

J. Nagy ◽

Z. Soltész ◽

M. Soltész ◽

P. T. Nagy ◽

...

Keyword(s):

Fruit Quality ◽

Dry Matter ◽

Shape Index ◽

Matter Content ◽

Nitrogen Supply ◽

Specific Yield ◽

Dry Matter Content ◽

Canopy Density ◽

Apple Cultivars

The aim of the present study was to determine the effect of nitrogen supply on yield and fruit quality of apple cultivars and to explore the relationships between canopy density and the different fruit quality parameters. The experiments were carried out at Kálmánháza, in Eastern Hungary in a private orchard in 2003-2004. The response of four apple cultivars ('Elstar', 'Gala Prince', 'Granny Smith', 'Idared') to different nitrogen dosages was studied. The assessed and calculated indices were: yield, fruit diameter, fruit height, shape index, fruit mass, firmness, dry matter content and colouration. The results indicated that nitrogen fertilization has a significant effect on the yield and fruit quality of apple cultivars. The calculated specific yield values were reduced by the application of nitrogen via the increase in the volume of the canopy. An opposit trend was observed for fruit diameter, fruit height and fruit weight, which increased with increasing nitrogen supply. The reduced shape index caused flattening of fruits. However, the improvement of fruit quality via increasing nitrogen dosage is only virtual, since these dosages increase the fruit size, but firmness, dry matter content and colouration are diminished, which decreases the value of the fruits on the market. The authors also studied the relationships between canopy density responsible for assimilation and light supply of the fruits and the different fruit quality parameters. The closest linear inversely proportional relationship was found in the case of colouration. There was a negative linear relationship between canopy density and firmness or dry matter content. The relationship between canopy density and fruit mass could be described by a quadratic polinomial function.

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