Effect of nitrogen and phosphorus on growth parameter, flowering parameter and content of NPK in African marigold

Abstract

This research was conducted to investigate the Effect of nitrogen and phosphorus on growth parameter, flowering parameter and content of NPK in African marigold, during ‘Kharif’ season 2019-2020 at Horticulture Section, College of Agriculture, Nagpur. The fertilizers applied as per the treatments to evaluate the growth, flowering parameter and content of nitrogen, phosphorus and potassium in African marigold flower and plant. The Experiment was laid out in factorial randomized block design with sixteen treatment replicates thrice. The treatments comprised of four levels of nitrogen viz. N1 -0 kg ha-1, N2 -80 kg ha-1, N3 -100 kg ha-1, N4 -120 kg ha-1 and four levels of phosphorus viz. P1 -0 kg ha-1, P2- 40 kg ha-1, P3 -50 kg ha-1, P4-60 kg ha-1. The maximum vegetative growth viz. plant height, stem diameter, plant spread and flowering parameters viz., days required for 50 per cent flowering, days required for first harvest were significantly found superior with the treatment combination of N3P3 (100 kg N ha-1 with 50 kg P ha-1). In respect of content of NPK in African marigold flower and plant increased with individual application of N3 (100 kg N ha-1) and P3 (50 kg P ha-1) and content of NPK in plant of African marigold was improved significantly with the combined application of N3P3 (100 kg N ha-1 with 50 kg P ha-1).