Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

EFFECT OF NITROGEN ON PHENOLOGY, LIGHT INTERCEPTION AND GROWTH IN AROMATIC RICE (Pages : 1 - 6)

A field experiment was conducted to study the effect of nitrogen fertilizer on yielding ability of indigenous aromatic rice cultivars under stacking and non-stacking conditions. Rice cultivars were grown during Aman season, 2002. There were four cultivars, namely, Shakkorkhora, Chinigura, Kalijira and Kataribhog, each with three levels of nitrogen fertilizer (0, 60 and 120 kg N ha-1 ). At the time of heading the experimental plots were equally divided into two parts. The crop in the half of the plot was left on the fate of the nature and that in the other half of the plot was mechanically supported by stacking to prevent lodging. Irrespective of cultivars, the days required to flowering and maturity significantly increased with the increase in the amount of nitrogen applied. Throughout the growth period Shakkorkhora with 120kg N ha-1 produce the tallest plant and Chinigura without nitrogen application produced the shortest plants. The internode length and culm hollowness significantly increased with the increase in N fertilizer levels. The lodging score was higher with the higher amount of nitrogen fertilizer applied. The cultivar Shakkorkhora remained erect up to 60 kg N ha-1 . Lodging occurred at different stage of grain development, Kataribhog lodged within four days after heading at 120 kg N ha-1 while it took 26 days to lodge at 0 kg N ha-1 . Irrespective of cultivars and nitrogen levels, higher N dose produced higher number of tillers. Leaf area index increased sharply after transplanting attaining a peak at heading stage and then decreased gradually. In non-stacking plant, all the cultivars showed lower LAI at maturity stage than stacking plant. At heading stage the higher light interception was found in all the cultivars with the increment of N levels. Download