Abstract:
Tomato (Solanum lycopersicum) belongs to the family Solanaceae is one of the important vegetable
crop grown in Sri Lanka. A field experiment was conducted to evaluate the effect of different
mulching materials on the growth and yield performance of tomato (Solanum lycopersicum) varieties.
Two factor factorial experiment was carried out in Randomized Complete Block Design (RCBD) with
three replicates. Six mulches (un-mulch - control, mulch film, white polythene, paddy straw, sunhemp and Gliricidia) and three varieties (KC1, Mahesha, and Rajitha) were used as treatment
combinations. All other management practices were performed based on the recommendation of
Department of Agriculture except weed control. The effect of mulching materials on weed
population, modification of soil microclimatic condition, growth and yield parameters were recorded
and data were analysed in ANOVA using SAS 9.1 package. The means were compared by using
Duncan Multiple Range test. Mulches were proved their effectiveness in weed control, ameliorating
the soil temperature and soil moisture conservation than un-mulch treatment, but the least weed
population was observed under the polythene mulch. There was a significance difference in vegetative
growth traits (Plant height and number of branches) and yield parameters (fruit weight, circumference
number of fruits per plant and yield) of tomato among mulches and varieties. In growth and yield
parameters, the highest growth and yield parameters were observed under Gliricidia mulch in
Mahesha variety. The usage of organic mulches economically profitable compare to un-mulched and
plastic mulched cultivation. It can be concluded that Gliricida mulch and Mahesha variety can be
recommended as the best combination for growing of tomato in Kilinochchi District during Yala
season based on the growth and yield performance of the plant.
