Effects of nitrogen doses and organic Alga 600 fertilizer on spinach, Spinacia oleracea growth and yield

This study was aimed to study the impacts of nitrogen and organic fertilization on the growth and yield of the spinach, using two levels of N (Urea) (0 and 40kg/donum) and organic fertilizer Alga 600 at (0, 2, 4, and 6g/L.). The results showed that the application of 40kg N /donum had a significant effect on the leaf length, chlorophyll, fresh weight plant, total yield kg/ha., inflorescences length, and seeds weight/plot. Application of Alga 600 at 6 gm/l had a significant increase in most studied traits except the no. of inflorescences/plant and weight of 100 seeds. Based on the findings, the interaction between 40kg N /donum and 6g/l of Alga600 revealed a significant increase in leaf length (cm), leaves number/plant, chlorophyll, plant weight (g), total yield (kg/ha). Inflorescences length (cm), seed weight /plot, seeds weight/plant (g).