Growth, flowering and bulb yield of tuberose (Polianthes tuberosa l.) cv. mexican single as affected by nitrogen and phosphorus under varying spacing

An field experiment on tuberose cultivar Mexican Single was conducted at Research Farm, Crop Cafeteria Unit (CCU) of Krishi Vigyan Kendra, Hastinapur, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (UP) India during the year 2014- 15 and 2015–16. The treatments compared three levels of N (100, 150 and 200 kg N/ha), three levels of P₂O₅ (100, 150 and 200 kg P₂O₅/ha) and with two spacing i.e., 10 × 20 and 20 × 20 cm in a Randomized Complete Block Design (RCBD) with the three replications. To the results obtained that for the maximum yield of spikes flowers and bulbs production of tuberose to be planted at a closer spacing of 10 × 20 cm and with a fertilized 200 kg of N and 150 kg P₂O₅ per hectare. The effect of spacing on vegetative growth and floral characters was observed to be non-significant. The spikes per plant were found to be maximum under wider spacing (20 × 20 cm). To the application of nitrogen at 200 kg/ha recorded significantly the highest value of vegetative and floral parameters. The number of days to first flowering was earlier at higher level of nitrogen. The response of phosphorus was non- significant on vegetative characters while floral characters viz., rachis length and number of florets per spike were found significant. Tuberose bulb yield in the case of clumbs weight tonne per hectare was also found significant and 200 kg phosphorus per hectare recorded the higher values.