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1

Results of experiments with densely-planted sour cherry trees for harvesting with a continuously moving combine harvester

100%
Mika A., Wawrzynczak P., Buler Z., Krawiec A., Bialkowski P., Michalska B., Plaskota M., Gotowicki B.
Journal of Fruit and Ornamental Plant Research
|
2011
|
tom 19
|
nr 2
Sour cherry trees cultivars Debreceni Botermo, Nefris, English Morello and local Sokówka Serocka were densely planted at4x1.4x1.5 and 4 x 2 m, and the leader trained for mechanical harvesting with a self-propelled straddle harvester working in continuous motion. From the 3rd year onward the trees were renewal-pruned. Branches older than 3 years were cut back and replaced by young wood. All the culti­vars were suitable for mechanical harvesting, although the trees of 'English Morello' were the most difficult to train because of weak growth and trailing shape. Growth measurements over six years indicated that the optimal planting density for 'English Morello' trees was 4 x 1.5 m, and for the other cultivars 4x2m. The harvester designed at the Institute of Horticulture, Skierniewice, was operated by 4 people and appeared to be able to harvest fruit with 95% effectiveness, delivering about 2000 kg of fruit per hour. Fruit quality was good for industrial processing, but not as good as that of hand-picked cherries suitable for freezing.
2

Biology of flowering and fruiting of sour cherry trees grown at high density

80%
Mika A., Buler Z., Michalska B.
Journal of Fruit and Ornamental Plant Research
|
2011
|
tom 19
|
nr 1
A study was carried out of shoot growth and branching, fruit bud setting and fruiting in four sour cherry cultivars: 'Debreceni Botermo', 'Nefris', 'Schatten- morelle' and 'Serocka'. Trees were planted at a high density (4 x 1.5 m), trained with a leader and pruned with the renewal method. A relationship was shown to exist be­tween shoot length and fruit bud setting density. Trees of 'Debreceni Botermo' were found to be the most vigorous, setting fruit buds on weak shoots and two-year-old spurs. 'Nefris' and ' Serocka' were medium in vigour, setting fruit buds mostly on one-year-old shoots irrespective of shoot length. They were characterized by heavy branching. 'Schattenmorelle' trees were small, slowly growing, setting fruit buds on one-year-old shoots with only one terminal leaf bud. This type of fruiting led to bare wood. Pruning appropriate to tree morphology is suggested.
3
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The effect of hybrid drying (convective-microwave-ultrasound) on the bioactive properties of osmo-treated sour cherries

80%
Celejewska K., Mieszczakowska-Frac M., Konopacka D.
Journal of Horticultural Research
|
2018
|
tom 26
|
nr 1
4
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Comparison of three sour cherry cultivars grown in Central-Eastern Poland

70%
Borowy A., Chrzanowska E., Kaplan M.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2018
|
tom 17
|
nr 1
Sour cherry is one of the most important fruit crops in Poland and cultivar is an important factor in its cultivation. The experiment was conducted in a commercial family orchard in a year characterized by a warm and wet spring and also by a very hot and dry summer. Fruit yields harvested from well fertilized 19-years old ‘Kelleris 16’, ‘Nefris’ and ‘Łutówka’ trees grafted on Mahaleb cherry and protected against pests using integrated plant protection system were medium high and of good quality, however productivity index of a tree was low. The fruits attained high weight and diameter and contained big amounts of sugars, vit. C, anthocyanins and flavonoids and medium amount of phenolic acids. Among anthocyanins the most important were cyanidin 3-glucosyl-rutinoside and cyanidin 3-rutinoside. Antioxidant activity of fruits measured as percent of DPPH inhibition was high and similar among compared cultivars. Łutówka was the most productive cultivar of medium leaf and fruit size and with fruits of highest vit. C and flavonoids content and lowest total sugars and monosaccharides content. The least productive cultivar was Nefris, though its fruits were the biggest and contained dry matter, soluble solids, anthocyanins and phenolic acids in the highest amounts of all and vit. C at the lowest level of all. Kelleris 16 was the medium productive cultivar characterized by widest leaf blades and smallest fruits. Content of total sugars and monosaccharides in its fruits was the highest and content of anthocyanins and phenolic acids was the lowest. Residues of dodine and thiacloprid determined in the fruits immediately after harvest were much lower than the permissible residue maximum level.
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