STM Article Repository

The field experiment was carried out in the winter season 2016-2017 in the project of developing tomato cultivation with modern technologies of the Directorate of Basra Agriculture in Khor Al-Zubayr, it included three factors that are interaction between four dates to plant Fajr lettuce seeds in the field (22/10/2016, 22/11/2016, 22/12/2016 and 22/1/2017) and the organic nutrients which are Algaton in 1.5 and 2 ml L-1 concentrations and Agrosign in 2 and 3 ml L-1 concentrations as well as the comparison treatment (zero) without addition, using two methods which are spraying on the total vegetative or adding it by watering through the soil, after 30 days from planting seedlings in the field with the date mentioned for each date and by two weeks between treatment and another and for three times.

Randomized Complete Block Design (RCBD) was used to factorial experiment with split plot design with three replications; the mean results were analyzed statistically using Genstat, V. 10.3 (2011) application, and the Least Significant Difference test (L.S.D.) was used to compare the means at a probability level of 0.05. The results showed that the first date (22/10) exceeded in the percentage of total soluble solids, nitrogen and potassium in the leaves, the second date (22/11) in stem diameter, the fresh and dry weights for it and the concentration of chlorophyll in the leaves, the third date (22/12) exceeded in the fresh and dry weights of the roots, and the fourth date (22/1) in the number of wrapped and total leaves and leaf area. The second (22/11) and first (22/10) dates without a significant differences between them exceeded in the number of wrapped leaves (38.92 and 39.83), fresh weight (504.77 and 501.59 g), dry weight (19.34 and 19.22 g) of the leaves, the weight of the marketing head (662.61 and 658.67 g), total marketing production (15.55 and 15.46 ton ha-1), total carbohydrate concentration (132.16 and 131.69 mg g-1 dry weight), and the percentage of phosphorus (0.244 and 0.238), while the second date (22/11) and the fourth (22/1) exceeded in stem diameter. The method of adding organic nutrients by spraying the total vegetative was superior in most of the traits except for the number of unwrapped leaves and the fresh and dry weights of the roots and the stem. The treatment of Agrosign at a concentration of 3ml L-1 exceled in most traits except for the superiority of the Agrosign treatments at a concentration of 3ml L-1 and Algaton at a concentration of 1.5 ml L-1 in plant height, fresh and dry weights, and the percentage of potassium in leaves, also the superiority of Algaton treatment at the 2 and 1.5ml L-1 concentrations in the number of total leaves in the plant, while the Agrosign at 3ml L-1 concentration and Algaton at of 2ml L-1 concentration exceeded in fresh and dry weights and the percentage of potassium in leaves. Most of the bilateral interactions between treatments as well as the triple interaction were significant in the growth indicators and traits under study.