Abstract
An experiment was carried out in the Cloth Canopy, Agricultural Research Station, College of Agriculture, University of Basrah, during the agricultural season 2018-2019, to study the effect of the seaweed extract spray (0, 2 and 4 m.L-1) on vegetative and flowering growth of two Narcissus species. Local white flowers (Narcissus tazetta) and the imported yellow flowers (N. eastertide). A factorial experiment with Randomized Completely Block Design (R.C.B.D) were used, with three replicates, the averages were compared using Least Significant Difference (L.S.D). When the plants reached treated at the emergence completion, leaves were sprayed to wetness full, with three times, the process was repeated every 15 days. The results showed that the white variety was significantly higher as well as plants treated with 4 m.L-1 extract showed significant superiority in all studied traits, the interaction between the white variety and spraying with seaweed extract concentration of 4 m.L-1 had a significant on the number of leaves5.00 leaf plant-1, leaf area 818 cm2, fresh and dry weights (30.16 and 15.70 g) of the vegetative total, flower stem length 45.55 cm, vase life 17.29 day. while the interaction between the yellow species and spraying with seaweed extract concentration of 4 m.L-1 had a significant on fresh and dry weight of the flowers (16.80 and 1.73 g).
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