A field research was directed in one of vegetable fields of Horticulture Department / Agriculture faculity / University of Al-Qasim Green for reduction season 2023-2024, with aim of study was effect of seaweed extract on the growth and yield of spinach plants. experimentation included 2 factors: one of it was spraying seaweed extract at three levels (1.5, 3, 4.5) Ml/L, and the other factor: the local and French variety (Virofly). Experiment was implemented according to a (R.C.B.D.) and means were compared using the (L.S.D.) test at the possibility level of 0.05.
The outcomes showed a significant increase, as the French variety of spinach V2 (8.22) leaf.plant-1 was superior to the local variety V1 (7.11) leaf.plant-1 in the number of leaves only, while the local variety V1 (27.11) cm.plant-1 was superior to the French variety V2 (22.89) cm.plant-1 in terms of plant height (cm.plant-1) and weight of the total wet yield (gm.m2-). The local variety V1 (398) gm.m2- gave the highest results compared to the French variety V2 (329 gm.m-2).
As the interaction results between variety and seaweed extracts showed, that was a significant increase in leaves number. We note that there were differences significant between treatments, like V2S2 action excelled and gave the highest value (9.67) compared to the treatment control V1S1, which provided (7.00), and the plant height recipe, as the comparison treatment V1S1 excelled (28.00) cm.plant-1, which provided the highest rate compared to V2S1 treatment. (21.33) cm.plant-1 and treatment V2S3 (22.33) cm.plant-1, which presented a lowest result, and the recipe for total plant yield. We note from the table above a superiority significant of the control treatment V1S1, which gave a highest value (468) gm.m2- compared to V1S2treatment, which offered the lowest rate (275) gm.m2- and the treatment. V2S1 (284) gm.m2- and treatment V2S3 (334) gm.m2-.
As for the dry matter and chlorophyll percentage, there are no differences significant between all treatments.