استجابة البصل للرش الورقي بمستخلص أعشاب البحر و حمض الجبريليك عند مستويات مختلفة من الري

الملخص EN

Yhis study was investigated at Agriculture Faculty of Damascus university during the agricultural season of 2012/2013 in order to determine the effect of foliar spray with seaweed extract (5 and 10 g/l) and GA3 (50 and 100 ppm) on the growth and production of local red onion (Baladi) at different levels of irrigation (100, 75, and 50% of field capacity).

Onion bulblets were planted in pots and plants were treated when they had 3-4 leaves and every two weeks until full vegetative growth.

Water supply levels were applied at the stage of 6-7 leaves for 20 days.

Foliar treatments reduced the adverse effect of water deficit and enhanced growth and production.

High concentrations of seaweed extract and GA3 increased significantly plant length (34.52, 34.71 cm, respectively), leaf area (234.46, 239.64 cm2 ), bulb weight (49.84, 49.9g), dry matter content (21.78, 21.84%) and water use efficiency (3.414, 3.562 g/l) compared to control (31.81 cm, 202.03 cm2 , 38.71g, 20.16%, and 2.650 g/l).