PJB-2018-699
Effect of different type and amounts of converted wastes on yield and physiological parameters of lettuce
Somaieh Afsari Yeganeh
Abstract
The use of agricultural waste as organic fertilizers is needed for soil fertility and plants health production. Therefore, the present study were conducted to evaluate the effects of three kinds of organic waste on lettuce properties in a complete randomized design at green house condition. Organic waste were carrot , sugarbeet and date fruit in four levels of zero, 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. Sugarbeet and carrot vermicompost was more effective on most lettuce properties with respect to 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 vermicompost (500% more than control) and in date fruit compost (50% lower than control). The highest amounts of carotenoids (0.49 mg/gr fresh weight) was in sugar beet vermicompost (6%), which increased by 40% with respect to control. The highest marketable indices was observed in sugar beet and date fruit compost (both at 2%) which were increased by 400 and 380 percent respectively in compared to control.
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