INFLUENCE OF NITROGEN AND ZINC ON GROWTH, YIELD AND NUTRIENTS CONTENT OF BRRI dhan33

Abstract

An experiment was conducted at the experimental held of' the Department of Agronomy in Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during T. oman season in 2012. The study was to find out the effect of nitrogen (N) and zinc (Zn) application on growth. yield and nutrient content of BRR1 dhan33. The experiment was laid out in a randomized complete block design with three replications. Five nitrogen levels viz. 0 (control). 75, 100, 125 and 150 kg N ha" were applied where urea was used as nitrogen source. On the other hand two levels of' zinc i.e. 0 (control) and 2.5 kg ha" Zn were applied as ZnSO4.71-120. From the result it was observed that all the growth and yield components significantly increased with nitrogen and zinc application. Eff'ect of' nitrogen levels showed a significant variation on plant height, total tiller production, panicle length, number of' filled grain panicie anc i uuv grain-veigm. Among inc ciitrerent nitrogen teveis me highest grain yield 5.07 t ha" was obtained from the application of 100 kg N ha''. On the other hand zinc application iiE 2.5 kg ha" gave a significant variation regarding growth characteristics and yield contributing characteristics hence result higher yield (4.63 t ha''), was obtained. From the combined effect it was found that the highest grain yield (5.57 t ha'') was obtained from the combined application of 125 kg N ha" and 2.5 kg Zn ha". Among different combinations. 125 kg N ha" along with 2.5 kg Zn ha' scored the highest nitrogen content (1.84%) in grain. A significant variation was observed on nitrogen and potassium content in straw due to the combined elièct of' nitrogen and zinc but there was no significant eiftct on phosphorus and sulphur content.