Articles

THE INFLUENCE OF DRIP IRRIGATION ON YIELDS OF SOME CULTIVARS OF APPLE TREES IN CENTRAL POLAND UNDER DIFFERENT RAINFALL CONDITIONS DURING THE VEGETATION SEASON

Article number
537_113
Pages
929 – 936
Language
Abstract
In the field experiments carried out in a production orchard near Bydgoszcz during five vegetation seasons the influence of surface drip irrigation on yield of apple trees (cv. ‘Melba’, ‘McIntosh’, ‘Spartan’) under differentiated rainfall conditions during the vegetation season was examined.
Under the influence of drip irrigation the mean five year increase of yield for the summer ‘Melba’ cultivar was 3.76 t/ha (19%), for autumn ‘McIntosh’ cultivar it was 4.72 t/ha (22%) and for winter ‘Spartan’ 4.64 t/ha (25%). Conducted correlation and regression analysis showed that the higher rain-precipitation during the vegetation season, the smaller was the yield increase due to drip irrigation.
The relationship calculated for the cv. ‘McIntosh’ was r = -0.918 but in case of ‘McIntosh’ and ‘Spartan’ cultivars it was smaller (r = – 0.697). The positive correlation dependences between the amount of seasonal irrigation rate applied by the drip system and increases of the apple yield caused by irrigation were as follows: 0.949 for cv. ‘McIntosh’, 0.894 for cv. ‘Spartan’, 0.863 for the late cultivars together (‘McIntosh’ and ‘Spartan’) and in case of all the three cultivars tested it was 0.704.

Publication
Authors
C. Rzekanowski, S. Rolbiecki
Keywords
Malus domestica, ‘Melba’, ‘McIntosh’, ‘Spartan’, surface drip irrigation, production orchard.
Full text
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