ISHS Acta Horticulturae 192: VIII International Symposium on Apricot Culture and Decline
EFFECTS OF FERTILIZATION ON NUTRIENT SUPPLY, YIELD, GROWTH AND FROST HARDINESS OF APRICOT TREES |
| Author: | E. Szücs |
| Abstract:
Leaf analysis showed effects of NPK-fertilizations on the potassium content in leaves but not on nitrogen and phosphorus. Positive correlations were established between the potassium level in leaves and the condition of the foliage, as well as the rate of the bloom, yield and vegetative growth too. The excess nitrogen (N.K-1 above 1.2) has a negative effect mainly on yield, flower frost hardiness and growth. In the second part of July the optimal potassium concentration of apricot leaves is 2.6–3.2% with N.K-1 ratio 0.8–1.2. | |
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