STUDY OF NERICA-1 AND TWO AMAN VARIETIES UNDER DIFFERENT LEVEL OF FERTILIZERS

Abstract

A field experiment was conducted at the experimental field of Sher -e- Bangla Agricultural University during July to December 2010 to evaluate the performance of introduced rice variety NERICA-1 along with HYVs in aman season under different levels of NPK fertilizers. The experiment was laid out in a split-plot design with three replications. Rice varieties differed significantly where BR11 produced higher grain yield (3.74 t ha yield (5.39 t ha -1 ) than BRRI dhan46 (3.16 t ha respectively) and NERICA-1 (2.33 t ha -1 -1 and 4.33 t ha -1 ) and straw and 4.98 t ha -1 , respectively). Fertilizer dose also significantly influenced all the growth and yield attributes except 1000-grains weight. Higher fertilizer dose (140-90-90 kg ha and K ha -1 2 O) increased the yield in all the varieties. The highest grain yield (3.83 t ) and straw yield (5.28 t ha -1 -1 N, P ) were obtained from higher fertilizer dose which was statistically at par with recommended fertilizer dose (120-80-80 kg ha -1 N, P 2 O 5 and K grain yield (4.72 t ha 2 O). Interaction results showed that significantly higher -1 ) and straw yield (5.86 t ha along with higher fertilizer dose (140-90-90 kg ha -1 -1 ) were given by BR11 N, P 2 O 5 and K was statistically at par with the same variety along with recommended fertilizer dose (120-80-80 kg ha -1 N, P 2 O 5 and K 2 2 2 -1 O O) which O). NERICA-1 produced comparatively lower grain yield, straw yield and harvest index which could not improve with any one of the fertilizer dose. , 5