EFFECT OF NITROGEN AND PHOSPHORUS ON THE GROWTH AND YIELD OF BRRI dhan38

Abstract

The experiment was conducted in the Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from July to November, 2013 to study the effect of nitrogen and phosphorus on the growth and yield of BRRI dhan38. The experiment comprised of two factors- Factor A: Levels of nitrogen 0 : 0 kg N ha -1 i.e. control; N 1 : 45 kg N ha -1 , N 2 : 55 kg N ha : 65 kg N ha -1 ; Factors B: Levels of phosphorous 0 : 0 kg P 2 O i.e. control, P 1 : 25 kg P 2 O 5 ha -1 and P 2 : 35 kg P 2 O 5 ha -1 5 . The experiment was laid out in a randomized complete block design 2 , P 2 and treatment combination N 2 P , whereas, the treatments N 0 , P 0 and treatment combination N 0 P showed the smallest plant height in each case, respectively. Side by side, the highest number of effective tillers per hill, highest length of panicle and the maximum number of filled grains per panicle were found in N 2 , P 2 treatments and N 2 P 0 treatment combination. The highest weight of 1000 grains 2 -1

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2 P 2 and also found highest in each individuals N treatments. N, P, K, S and Zn concentration in case of grain and straw were found the highest in N 2 , P 2 treatments and N 2 P treatment combination. The organic matter content 2 2 P treatment combination and

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ha 2 -1 -1 , N 3 2 and P 2 also found highest in each individual N 2 and P 2 treatment. Application of 120 kg N ha -1 and 35 kg P 2 O was more potential in regarding yield contributing characters and yield of BRRI dhan38. 5