EFFECT OF POTASSIUM FERTILIZATION ON ANNA APPLE TREES GROWN IN SANDY SOILS OF EGYPT | ||
| Egyptian Journal of Agricultural Research | ||
| Article 18, Volume 75, Issue 4, December 1997, Pages 1069-1080 PDF (2.8 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1997.426487 | ||
| Author | ||
| EMAN S. ATTALA | ||
| Horticultural Research Institute, Agricultural Research Centre, Giza, Egypt | ||
| Abstract | ||
| The effect of applying different doses from 0 to 2 kgs of potassium sulphate/tree, divided in four applications, was investigated on Anna apple trees on M.M. 106 stock grown at newly reclaimed sandy soils under a drip irrigation system. No significant effect in leaf N and P content occurred in response to fertilizer addition yet, K, Fe. 7n and Mg content were increased by application of 1.5 or 2.0 Kgs of K2 SO4 Likewise, obvious increases in leaf total soluble and non soluble carbohydrates were evident. Significant increase in fruit set and decrease in fruit drop were also noticed. Fruit weight, volume, flesh firmness and T.S.S. values were increased by 1.5 and 2.0 Kgs rate of the fertilizer rendering higher values of T.S.S. /acidity that caused earlier fruit ripening. However, acid content was not affected. Yield was highly increased by the high rates of potassium sulphate additions. | ||
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