Effect of Rootstock and Different Amounts of Vermicompost In Media on Yield and Qualitative Characteristics of Tomato

The effects of grafting and vermicompost on yield and quality of tomato were studied by a factorial experiment based on completely randomized design with 4 replication in research greenhouse of Mohaghegh Ardabili University at 2013. Rootstocks (none-grafting, grafting on ‘Yedi’ and ‘KingKong’) and five volume of vermicompost (0, 15, 30, 45 and 60%) in substrate were considered as experimental factors. For this purpose, traits such as number of flower and truss, growth duration of fruits, number of fruits, fruits mean weight, fruit yield, TSS and TA of fruits, phosphorous and potassium content of aerial parts of plants were measured. Results showed that flowering in grafted plants significantly retarded in comparison to non-grafted plants. Addition of vermicompost into substrate significantly increased number of flowers, panicles and fruits per each plant, TSS and TA but mean weight and size of fruits was decreased. Application of vermicompost improved phosphorous and potassium content in aerial parts of plants. Interaction between grafting and vermicompost was significant on yield and growth duration of plants. In general, we can say that grafting on ‘KingKong’ and ‘Yedi’ rootstocks and application of vermicompost can improve yield and quality of tomato plants.