Assess Yield and Physiological Parameters of Lettuce Affected Different Types and Amounts of Some Organic Wastes

The use of agricultural waste as organic fertilizers is important for soil fertility and plants health production. The aims of this study were to examine the effects of different types and rates of vermicompost on physiological and morphological properties of lettuce. Present study was conducted according factorial experiment based on complete randomized design with three replication at green house condition. Treatment included different type of vermicompost (1-Carrot vermicompost 2-Sugar beet vermicompost and 3- date fruit composts) and different application rate of vermicompost (Zero or control, 2, 4 and 6 percent of medium dry weight). The results showed that, the type and amount of organic wastes had significant effects on fresh and dry weight, leaf area, plant height, marketability, carotenoid and chlorophyll b content of lettuce. Sugar beet and carrot vermicompost was more effective on most lettuce properties than date fruit waste. The organic compost rate had a sigmoid trend effects on most lettuce properties. The highest and lowest lettuce dry weight was observed respectively in 2% carrot vermin compost (500% more than control) and in date fruit compost (50% lower than control). The highest amount of carotenoid (0.49 mg.gr-1 fresh weight) was in sugar beet vermicompost (6%), which increased by 40% with respect to control. The highest marketable index was observed at (2% and 4%) both in sugar beet, which were increased by 400 and 380 present respectively in compared to control. Sugar beet and then carrot vermicompost were evaluated as the best raw materials for vermicompost production; also 4 and 6 percent had the greatest effect on the growth and yield of lettuce.