Department of Horticulture, Punjab Agricultural University, Ludhidna
In this experiment, 12 fertilizer combinations comprising three levels of N (0.50, 1.00 and 1.50 kg/tree) and two levels (0.50 and 1.00 kg/tree) each of P and K were tested under light, medium and heavy prunning severities. Heavy pruning produced significantly more growth than the light and medium pruning in terms of cumulative girth and the shoot length. By increasing the N dose from 0.50 to 1.50 kg per tree, the trunk circumference increased significantly. P and K had no effect on tree growth. The lightly-pruned trees gave significantly higher cumulative yield than the medium-and the heavily-pruned trees. Heavy-pruning yielded significantly heavier fruits than the light-pruning in both the years. The cumulative yield was the highest in N2P1K1 treatment. The pruning and fertilizer treatments had no significant effect on TSS and acidity in both the years of study. The pruning × fertilizer interaction did not significantly affect the tree growth, fruit yield, TSS, acidity and TSS/acid ratio.
