Effect of cultivation system, fertilization with calcium and organic nutrient (Tecamin Tex-fruit) on growth, yield and quality of two lettuce cultivars Lactuca sativa L.

Abstract

            The experiment was carried out at vegetables field of Horticulture and landscape Design department. College of Agriculture and Forestry. University of Mosul during the growing season 2021-2022 to study the physiological effect of some treatments on vegetative growth, quantitative and qualitative yield, quality traits, physiological damages, leaves content of nutrients, and economic feasibility of lettuce plants. The experiment included a study of the effect of three different factors, the first: Cultivation system ( growing lettuce plants under the conditions of the unheated plastic house and cultivation in the open field) , as for the second factor: It included the type of fertilizer, as this factor included two types of fertilizers Calcium fertilizer with two concentrations of 150 and 300 mg L^-1 and the organic nutrient (Tecamin Tex-fruit) with two concentrations of 3 and 6 ml L^-1 in addition to the comparison treatment, while the third factor included two lettuce cultivars (Rawaa and  Fajr). The results were analyzed statistically according to Dunkin's multiple range test at the probability level of 0.05%. The most important results can be summarized as follows: The plants grown in the open field were significantly superior to the plants grown inside the plastic house in the total head weight, the total yield per square meter, the total yield of the experimental unit, and the plants treated with both concentrations of the organic nutrient Tecamin Tex-fruit 3 and 6 ml L^-1 achieved significant increase in all studied yield traits. plants Rawa  cultivar were significantly superior to Fajr cultivar plants in all quantitative yield traits.