THE IMPACT OF WATER QUALITY, BIO FERTILIZERS AND SELENIUM SPRAYING ON SOME VEGETATIVE AND FLOWERING GROWTH PARAMETERS OF CALENDULA OFFICINALIS L. UNDER SALINITY STRESS

The experiment was conducted in one of the fields belonged to the Department of Horticulture and Landscape Gardening, College of Agriculture, Al-Qasim Green University in the autumn season 2019-2018. Calendula seed hybrid Costa Yellow was cultivated on 24/9/2018. After the plant is reaching a couple of real leaves, the plants were transferred to plastic pots. The experiment was conducted by the randomized complete block design (RCBD) according to the split-split plot design system with three replicates and the averages were compared according to the Least Significant Difference (LSD). Irrigation with salt water W2 led to a decrease in some traits of vegetative growth (Leaf area, leaves content of chlorophyll and the percentage of dry matter in leaves) as well as a decrease in most traits of flowering growth. Biofertilizer achieved a significant increase in the leaf area and leaves content of chlorophyll and increase the number of flowers and the flower weight, that spraying with selenium concentration (20) mg.L-1 resulted in a significant increase in the leaf area, flower diameter, number of flowers and the flower weight.