Effect of organic manures, biofertilizers and micronutrients on growth, yield and quality of onion (Allium cepa L.)

A field experiment was conducted during the Rabi season to find out the effect of organic manures, biofertilizers and micronutrients on growth, yield and quality of onion cv. NHRDF Red - 2. There were 13 treatments viz. , T 0 (Recommended dose of fertilizers), T 1 Poultry manure, T 2 vermicompost, T 3 Azotobacter , T 4 VAM, T 5 Azotobacter +RDF (50%)+zinc, T 6 Azotobacter +RDF(75%)+zinc, T 7 VAM+RDF(50%)+boron, T 8 VAM+RDF (75%)+boron, T 9 RDF (25%)+VAM+poultry manure (50%)+ Azotobacter +boron, T 10 (RDF (25%)+VAM+vermicompost (50%)+ Azotobacter +boron, T 11 RDF (25%)+VAM+poultry manure (50%) Azotobacter +zinc, T 12 RDF (25%)+VAM+vermicompost 50% Azotobacter +zinc and the experiment was laid out under RBD with three replications. The study clearly revealed that there were significant effects of various treatments on the growth, yield and quality attributes of onion. The number of leaves per plant (12.15), plant height (73.02cm), neck thickness (22.00mm), bulb length (6.46 cm), bulb diameter (7.20cm), yield (398.36 kg/ha -1 ) were recorded maximum in treatment T 12 whereas T.S.S (14 °B), vitamin C (12.11mg/100g), total sugars (10.52%), reducing sugar (6.23%) and non-reducing sugar (4.28%) were found maximum in T 10 treatment as compared to other treatment. However, T 12 was good for higher yield improvement and T 10 was the best for quality improvement among the all treatments under study, the application of T 12 (RDF (25%)+VAM+Vermicompost 50% Azotobacter +Zinc) may be suggested for successful cultivation of onion in Lucknow.