Abstract:
This experiment was conducted to study the influence of refused tea, charcoal and saw dust
on growth and yield of lettuce (Lactuca sativa L.) is a leafy vegetable. It was arranged in a
randomized complete block design (RCBD) with eight treatments contained various
concentrations of organic materials and each treatment had 6 replications. Potting mixtures
were soil: cow dung: organic material in different ratios as treatments. Seeds were sown in
nursery trays and then healthy plants were transplanted to each polybag. Observation was
made every week. Growth parameters were taken in regular interval and lettuce yield was
calculated based on fresh weight of plant. The results showed that addition of refused tea
and saw dust to the potting mixture positively influenced and improved the plant growth
characteristics such as plant height, number of leaves, length and width of leaves, leaf area
and also fresh and dry weights of shoot and root. Low results were observed in the
treatment contained charcoal than refused tea and saw dust. At the harvest, treatment T4
and T7 which had refuse tea in the potting mixture and treatments T5 and T8 which had
saw dust in their potting mixture attained positive result than other treatments. The highest
yield of lettuces was obtained with the influence of refused tea(1.9ton/ha inT4 and 1.61
ton/ha in T7) and saw dust (1.18 ton/ha in T4 and 1.35 ton/ha in T8). The highest value of
overall acceptability was noted in treatments T7 followed by T5, T4 and T3. The T7
treatment had better overall acceptability than other treatments based on the sensory
evaluation.
