EFFECT OF NITROGEN AND SULPHUR ON THE GROWTH, YIELD AND QUALITY OF BORO RICE (BRRL iThan 28)

Abstract

The experiment was conducted at Sher-e-Bangla Agricultural University (SAU) farm, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the period of December 2007 to April 2008 to study the effect of nitrogen and sulphur on the growth. yield and quality of Boro rice. BRRI dhan 28 was used as the test crop in this experiment. The experiment was laid out in randomized complete block design (RCBD). There were twelve treatment combinations comprising of four levels of N (0, 120, 140 and 160 kg hi') designated as N o, N1 . N, and N3 and three levels of S (0,20 and 30 kg S hi') designated as S 0. S, and S2. There was a positive impact of each nutrient and their interactions on yield, yield parameters and nutrient contents of boro rice BRRI dhan 28 with increasing rate of nitrogen and sulphur. In case of individual effect of nitrogen the maximum plant height (87.4 cm) was observed in N 2 (140 kg N hi') treatment, and number of filled grains panicle' (102.8) and grain yield (6.9 t hi') were recorded in N3 (160 kg hi') treatment. The straw yields were almost similar in different levels of N except N o treatment. Application or 30 kg S hi' produced the highest number of effective tillers hilF' (11.9), filled grains paniel&' (90.1). straw yield (7.8 1 ha4 ) and grain yield (6.5 t hi'). There was no significant single effect of S on plant height and 1000-grain weight of BRRI dhan 28. The treatment combination of N352 (160 kg N hi' + 30 kg S ha 4) performed better than other treatments in present trial considering number of filled grains

grain and straw yield of Boro rice BRRI dhan 28. The uptake and concentration of N, P. K and S in grain and straw increased with increasing levels of N and S. ibe post harvest soils of N3S2 (160 kg N hi' + 30 kg S hi') resulted the highest total N and available S content. From the view point of grain yield, nutrient concentration and the quality of post harvest soils, the treatment combination of N 3S2 (160 kg N ha' + 30 kg S hi 5 was considered to be the suitable dose of fertilizer for boro rice in Deep Red Brown Terrace soil.