Evaluation of Nutrient Removal from Different Parts of Koroneiki Olive Trees Grown in Sandy Soil as a Base of Fertilizer Recommendation in Egypt

The aim of this study was to assess the nutrient status of Koroneiki olive trees grown in sandy soils and measure the amount of nutrients that the olive tree removes each year.

Costate Statistical Package was used to measure means, maximums, minimums, and standard deviations (SD) using 12 replicates.

Between January 2011 and December 2012, researchers studied El-FIFA farm, which is located at km 48 of the Cairo-Alexandria road in Egypt’s northwestern region.

The experiment was conducted on ten-year-old olive trees cv. Koroneki that were grown in a loamy sand soil. The trees are planted at a 6 x 6 metre spacing (278 tree/ha-1) and are pruned moderately every year using traditional cultural practises. Separating the flesh from the pit, weighing it, and drying it was over. Nutrient concentrations in the flesh and pit were determined, and the nutrients removed by fruit were quantified. Pruning materials were divided into branches and leaves, measured, and dried. The quantities of nutrients extracted annually in pruning is determined based on the dry matter and nutrient concentration in the various tissues. For each organ, nutrient removals were determined by multiplying dry weight by nutrient concentration. The total nutrient removal/tree was calculated by adding these figures together.

The contents of N, P, K, Ca, Na, Mn, Zn, Cu, and B in the leaves are adequate, whereas the levels of Fe and Mg are high. When the yield was 77.33 kg/tree, the nutrients extracted were: 265.24 g N; 37.93 g P; 353.93 g K; 122.67 g Ca; 76.94 g Mg, 74.78 g Na; 7.288 g Fe; 0.773 g Mn;0.514 g Zn, 0.213 g Cu and 0.663 g B.

Conclusion: It was discovered that moderate pruning extracted large quantities of nutrients from fruit and pruned content, which can become inadequate for high oil yields in sandy soils. The obtained results can be used to calculate fertiliser recommendations.

Author (s) Details

Mohamed M. El-Fouly
Department of Fertilization Technology, National Research Centre, Egypt.

A. A. El-Taweel
Horticulture Research Institute Giza, Egypt.

I. M. S. Osman
Horticulture Research Institute Giza, Egypt.

Ikram Saad El-Din
Horticulture Research Institute Giza, Egypt.

S. H. A. Shaaban
Department of Fertilization Technology, National Research Centre, Egypt.

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