Effect of Nitrogenous, Organic and Biological Fertilizers on some Vegetative and Qualitative Characteristics of Spinach Plant Spinacea oleracea L.

Abstract

The experiment was conducted in the fields of the Department of Horticulture and Landscape / College of Agriculture / University of Karbala in Al-Hussainiya district of Karbala governorate during the autumn season 2021-2022 to study the response of some chemical and qualitative characteristics of spinach variety Viroflay, with 2 factors, the levels of nitrogen fertilizer (urea) represent the main plots and the sub plots the fertilization treatments of the secondary panels (Sub plot) and the experiment included 54 experimental units, and the differences were compared using the least significant difference test (L.S.D) at a probability level of 0.05. The results of the fertilizer addition (biological fertilizer + poultry manure) to the T6 treatment showed a significant superiority in the characteristics of vegetative growth, as it gave the highest rates and reached in plant height (23.71 cm. plant -1) And the average number of leaves (11.77 leaves. Plant-1) and the dry weight of the shoot (8.97 g. plant-1). The addition of nitrogen fertilizer (urea) when treated with N100% resulted in a significant superiority in the characteristics of vegetative growth, and the highest rates were in plant height (22.71 cm. Plant- 1) And the average number of leaves (10.89 leaves. Plant-1), and the dry weight of the shoot (10.23 g. plant-1), The same treatment had a significant effect on the chemical indicators, as it recorded a clear decrease in the content of nitrates and oxalates, which amounted to (110.0 mg g-1 and 81.20 mg g.100 ml) Plant respectively.