Municipal Solid Waste (MSW) Compost as a Tomato Transplant Medium

For 3 years, different types of growing media were evaluated in nursery-produced tomatoes (Lycopersicum esculentum Mill. cv “Atletico”). Five mixtures of substrates were used: old peat (65%) + white peat (30%) + perlite (5%), old peat (65%) + MSW compost (30%) + perlite (5%), MSW compost (65%) + white peat (30%) + perlite (5%), MSW compost (95%) + perlite (5%) and MSW compost (50%) + cocofiber (50%). Various seedling indices were measured in order to assess the quality of the nursery-produced plant. The quality of the MSW compost used (pH, salinity, organic matter) bore a strong influence on results. Electrical conductivity (EC) values of the MSW compost of over 9 dSm−1 produced poorer quality tomato seedlings in the mixture of substrates with peat. The use of MSW compost as the only substrate and the mixture of MSW compost with cocofiber had a lower growth index and poorer performance than the standard peat mixture. However, growth and development of the tomato seedlings in the mixture: old peat (65%) + MSW compost (30%) + perlite (5%) were similar to that obtained with the standard mixture: old peat (65%) + white peat (30%) + perlite (5%).