Abstract



An experiment was conducted inside a plastic house (500m2) at the olericulture research field of the protected cultivation department in Technical Institute of Zakho, Dohuk Polytechnic University, Kurdistan Region-Iraq within Autumn season of (2018-2019) to find out the influence of seaweed extracts applied with three levels (0, 2 and 4) ml/L and the licorice extract with three levels (0, 2 and 4) ml/L on the growth and yield of strawberry crop grown under greenhouse conditions. The seaweed extracts and licorice extracts were sprayed three times about 10 days' intervals. The obtained results have shown that spraying the strawberry plants with the seaweed extract at (4) ml/L and the licorice extract at (4) ml/L caused a significant enhancement in the chlorophyll content of leaves as well as yield parameters (fruit number per plant, fruit weight (gm) and total yield (ton. ha-1) and percentage total soluble solids (TSS) in comparison with control and other treatments. Our results suggesting that both seaweed extracts and licorice extracts are recommending for production of the healthier and higher crop with fewer costs and environmental hazards.