INFLUENCE OF DIFFERENT FORMS OF NITROGEN ON THE PERFORMANCE OF SOME INBRED AND HYBRID VARIETIES OF RICE

Abstract

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from November, 2011 to May, 2012 to study the 'Influence of Different from of Nitrogen on the Performance of Some Indred and Hybrid Varieties of Rice'. The experiment comprised of two factors viz. Factor A- source of N: (I) N o = Control (No Urea application) (ii) N, = 2.7 g size. N 2 = Prilled Urea (PU) at three installments and (iv) N3 = NPK Super Granule. Factor B-Variety: (i) V 1 = BRRI hybrid dhan 2 (ii) V2 = ACI hybrid dhan I (iii) V3 = Hybrid Hira Rice and (iv) V4 =BRRJ dhan. Analysis is done considering the factors viz. Effect of variety, forms of N and their interaction. From the experimental analysis it can be Concluded that among the four varieties, Results showed that BRRI Dhan29 (inbred) (I 4) Showed the highest grain yield (6.74 t hi'). biological yield (15.32 t hi') and highest Harvest index (43.49%) where hybrid hira dhakn (v 3 ) showed the lowest grain yield (6.22), lowest biological yield (14.49 t hi') and lowed Harvest index (42.29%). But BRRT hybrid dhan 2 (V1 ) Showed the highest straw yield (8.59 t ha d ) and AC! hybrid rice (V2 ) showed the lowest straw yield (8.42 t hi'). Among the treatments. N 3 ( NPK Super Granule) Showed the highest number of effective tillers hiW 1 (18.25), lowest number of non-effective tillers hilF' (2.12), highest number of panicle (18.65), highest number of grains panicle'' was recorded by N 3 (NPK Super Granule) (174.60), Highest 1000 seed weight was recorded N 3 (NPK Super Granule) (27.85 g), highest grains yield (7.87 t hi'), highest straw yield (9.00 t hi'), highest biological yield (16.80 t hi'), and highest Harvest index ((46.65%) where N o (Control) treatment showed the lowest number of effective tillers hilt' (9.05), highest number of noneffective tillers hilt' (3.84), lowest number of panicle at harvest (9.56), lowest number of grains ppanicl&' (140.30) lowest 1000 seed weight (21 .22g), lowest grain yield hi' (4.18 t hi'), the lowest straw hi'(7.37 t hi), lowest biological yield hi' (11.53 t hi 5 and lowest Harvest index (36.16%), The combination effect study N 3V4 (BRRI dhan29 x NPK Super Granule) Showed the best performance regarding growth, yield and yield contributing. So, N 3V4 (BRRI Dhan29 x NPK Super Granule) was the best treatment for the present study.