Integrated impact of micronutrients and potassium humate applications on growth, yield and fruit quality of tomato

Micronutrients play vital role in improving fruit quality due to their physiological role in metabolism and plant growth. Integrated effect of different rates of micronutrients (0, 50, 75 and 100% of recommended dose) and potassium humate (0, 5, 10 and 15 kg ha(-1)) on growth, yield, fruit quality and leaf mineral composition of tomatoes was investigated through pot experiments for two years. Results showed significant improvement in growth attributes, leaf mineral contents and finally yield of tomato due to integrated use of potassium humate and micronutrients. Chemical analyses of red-ripe fruits showed improvement in their nutritional characters due to more nutrient accumulation in fruits. Application of Zn, Fe and B mixture along with potassium humate as soil amendment enhanced fruit pulp, total soluble solids, titratable acidity and ascorbic acid of red-ripe fruits and fruit yield over control ones. Our investigation highlights an existing unexploited potential of potassium humate as soil organic amendment in improving tomato nutrition and supports non-conventional programs to improve tomato nutritional value.