Effects of Nitrogen Doses on Aromatic Rice Varieties' Performance

Abstract

At the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh, two aromatic rice varieties, Kalizira and Chinisagar, were examined for their nitrogen needs during the Aman season. The nitrogen concentrations were as follows: N0= 0 kg ha-1, N20= 20 kg ha-1, N40= 40 kg ha-1, N60= 60 kg ha-1, and N80= 80 kg ha-1. The use of nitrogen significantly improved the harvest components, grain harvest, and straw harvest of both varieties of rice. When comparing grain and straw yields, the Chinisagar cultivar was superior to the Kalizira. There was no discernible difference between the rice varieties with regard to the nitrogen concentration of grain and straw. Total nitrogen absorption was much higher in chinisagar compared to related to Kalizira species. The nitrogen application yielded a grain harvest of 1.8 t ha-1 for both varieties. At 60 kg N ha-1, the highest yields of 3.1 t ha-1 were recorded in Kalizira, whereas in Chinisagar they were 3.2 t ha-1. Both types of grain had a steady increase in yield as N treatments increased up to 60 kg N ha-1, but a decline at 80 kg N ha-1 and beyond. Forty kilograms of nitrogen per hectare may be the sweet spot for both varieties.