Effect of nitrogen and phosphorus levels on growth, flowering and yield of China aster

A field experiment was conducted during winter season of November 2004 to March 2005 to find out effect of nitrogen and phosphorus doses on the performance of China aster cv. Poornima under Western Uttar Pradesh conditions. Three levels, each of nitrogen (100, 200 and 300 Kg/ha) and phosphorus (100, 150 and 200 Kg/ha) and a control were tested in Factorial R.B.D. with three replications. Application of nitrogen and phosphorus at their higher levels, i.e. 300 Kg N and 200 Kg P₂O₅, respectively, resulted in the tallest plant, maximum number of leaves, branches and flowers, thickest stem, largest sized flower, longest flowering duration, maximum fresh and dry weight of flower and the highest yield of flowers.