Influence of biofertilizers with different levels of nitrogen on growth of young arecanut

摘要

The investigation was carried out at Horticultural Research Station, Mondouri, BCKV, Nadia on young arecanut (1 year 10 months old) cv. Mangala during 2001-02 to find out the effect of biofertilizers on growth of arecanut when applied with different doses of inorganic fertilizers. Biofertilizers were applied @ 25 g/palm with 5 kg FYM during June and February and nitrogenous fertilizers were applied 15 days after biofertilizer application. Palms were inoculated with Azotobacter, Azospirillum and theircombination with four levels of nitrogen as inorganic (25, 50, 75 and 100%). Azotobacter with 75% N recorded maximum increase in plant height (104.67 cm) and basal girth (5.60 cm) but the plants with Azospirillum inoculation at the same nitrogen level recorded maximum increase in leaf number (6.67) as compared to full dose of N (74.00 cm 4.30 cm and 6.00). The experimental results clearly indicate that there is a chance of saving of 25% nitrogenous fertilizer through biofertilizers.