Avaliação de substratos para a produção de mudas de tomate e pepino/Evaluation of substrates for the production of tomato and cucumber seedlings

The aim of this study was to evaluate the response of tomato and cucumber seedlings to different compositions of organic substrates formulated with compost of poultry slaughterhouse wastes, tree pruning residue, and sand. Experiments were performed in 200-cell trays in a randomized block design. The treatments for tomato seedlings were: T^sub 0^ (Plantmax HT); T^sub 1^ (compost); T^sub 2^ (compost + sand, proportion 3:1 weight); T^sub 3^ (compost + sand, proportion 1:1 weight) and T^sub 4^ (compost + sand, proportion 1:3 weight); and for cucumber seedlings were: T^sub 0^ (Plantmax HA) and the same composition of organic substrates used for tomato seedlings. Seedling emergence (EP), root length, dry mass of the root, and shoot (MSPA) were evaluated. Substrates T^sub 0^ and T^sub 4^ provided a faster EP for tomato seedlings, thus increasing the CR. The MSPA of cucumber of plants from T^sub 3^ and T^sub 4^ showed a higher accumulation of dry mass comparing with those from T^sub 0^ and T^sub 1^.