Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 1
Written by Inna BILICI
The given work relates to the study of the light regime and the structure of the vegetative composition in the Golden Delicious Reinders and Red Velox apple tree varieties. The solar regime in the crown of the apple trees of the studied varieties in the 4th year after their planting differs depending on the position of the sun in the sky, the distance from the ground and the length of the tree rows. The intensity of the solar radiation gradually increases from 9 o’clock till 13-15 o’clock, then decreases. The penetration of the solar energy into the crown increases from the base of the crown to the top of the tree. Based on the data obtained during the study, it can be asserted that the orchards in which trees have a height of 3.5-4.0 m and a crown width at the base of 1.0-1.2 m which decreases towards the top up to 0.8-1.0 m, form well-lit fruit-growing ecosystems, which receive in all areas of the vegetative ensemble more than 0.2 cal/cm2 x min, i.e. as much as it is necessary for the photosynthesis process. The volume of the crown of the studied varieties depends on the vigour of the variety and the size of the trees. It provides light penetration to all elements of the crown, which allows.
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