تأثير مستويات مختلفة من السماد الآزوتي المضافة ضمن شبكة الري بالتنقيط في الاستهلاك المائي و بعض المؤشرات الإنتاجية لأشجار الزيتون

Abstract EN

Under the intensive use of water and fertilizers in agricultura, and the water shortage conditions that face the region, there was a necessity to determine the crop fertilizer needs and the irrigation schedule to increase the efficiency of water and fertilizer use and reduce the production costs.

This study was carried out during 2011-2012, 2012-2013 seasons in Swiedain order to determine the water consumption of olive trees under different levels (75, 100, 125)% of nitrogen fertilizer (Amonium Nitrate 33%) through a drip irrigation network, and its relation with some productivity indicatorsof olive trees.The Moisture content was measuredusing the Nitron-Prop, where the irrigation was applied at 70% of the field capacity.

Results showed an increase of 7% in the water consumption as the level of the applied fertilizer increasedbecause of the increase in the amount of the irrigation water.The crop coefficient ranged between 0.62 and 0.75 based on the growth stages.The mixed effect of the increase in irrigation water and the fertilizer level was accompanied with an increase in the average productivity of ttrees by 30%, and with an increase in the average of fruit weight by 23% in coparsion to the results obtained when 75 and 125% of the fertilizer were applied.

It was concluded that the productivity indicators of oil trees can be improved by the good management of the services operations