أثر الرش الورقي ببعض المستخلصات الطبيعية و GA3 في نمو نبات البصل (Allium cepa L.)‎ و إنتاجه من البذور

Abstract EN

The experiment was carried out during the growingseason (2013/2014) at a nursery belonging to Damascus governorate next to Faculty of Agriculture, Damascus University to study the effect of foliar spraying with two concentrations (10 and 15g/l) of liquorice roots, seaweed extracts dry yeast bread suspension, and GA3 (150 and 250 mg/l) on the growth and seed production of the local red onion.

Spraying treatments took place once every two weeks and for a total of 4 times during the whole season, starting at the stage of 3-4 true leaves until the onset of bolting.

The experiment was designed according to the complete randomized blocks design, with four replicates per treatment and 15 plants/repea.

All treatments were significantly superior to controlin most vegetative growth and flowering indicators.

This was positively reflected on the seed production indices.

Foliar spray with solution GA3 (250 mg/l) and liquorice roote xtract (15 g/l) were significantly better than all other treatments including control in most studied indicators.

Average per-plant seed yield reached in the previous two treatments (44.38 and 43.64 g/plant), respectively and the per-area unit seed yield reached (443.8 and, 436.4g/m2 ).