Effect of Different Level of Nitrogen Fertilizer on Growth Yield and Yield Component of Tomato ( Lycopersicon esculentum Mill.) at West Showa Zone, Oromia, Ethiopia

摘要

The field experiment was conducted in West showa zone, Toke kutaye district of Ormia region,Ethiopia with the objective to determine the optimum nitrogen fertilizer rate on different growth parameters, yieldand yield component of tomato crop. To attain the objective, four level of nitrogen fertilizer Viz., 0, 50, 100 and150 kg/ha were used as treatments. The experiment was laid out in randomized complete block design (RCBD)with three replications. Data on plant height, primary branches per plant, number of leaves per plants, numberof cluster per plant, number of fruits per cluster and fruit yield were collected from five plants of the middle rowsof each plot and subjected to statistical analysis software (SAS) version 9.3 and LSD at 5% was used for meancomparison. The statistical analysis showed that, there was the significant (P0.05) difference among treatmentsfor all parameters except for number of fruit per cluster. For growth variables, 150 kg/ha revealed the highestvalue but there was no significant (P0.05) difference between 100 and 150 kg/ha of nitrogen except for theheight of the plant. The treatment 150 kg/ha nitrogen fertilizer provided 22.41, 35.57 and 25.40% over the controltreatment in height, number of leaves and primary branches, respectively. The treatment 150kg/ha nitrogenfertilizer increased the number of cluster per plant and yield of tomato fruit per hectare by 34.50 and 70.79% overthe control treatment, respectively. However, there was no significant difference in both number of cluster perplant and yield per hectare between 150 and 100kg N/ha.