EFFECT OF NITROGEN AND PHOSPHORUS ON THE GROWTH, YIELD AND NUTRIENT UPTAKE OF BAR! TOMATO-2 (RATAN)

Abstract

The experiment was conducted at the Research Farm of Sher-e-Bangla Agricultural dd siA University, Dhaka- 1207. during November 2010 to March 2011 to evaluate the effect of nitrogen (N) and phosphorous (P) on the growth and yield of BAR] tomato-2 (Ratan). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments used were: four levels of nitrogen as No : o kg N/ha, Nico: 100 kg N/ha, N 15 0: 150 kg N/ha and N200: 200 kg N/ha and four levels of phosphorous as P0: 0 kg P205/ha, P50: 50 kg P205/ha. P100: 100 kg P205/ha and P150: ISO kg P205 Tha with 16 treatment combinations. Yield and yield contributing characters. N. P and K concentration in plant and post harvest soil were recorded. Plant height at 60 days after transplanting, number of branches per plant. number of flowers per plant, number of fruits per plant and fruit weight per plant increased significantly with increasing N level up to 150 kg /ha, whereas fruit yield increased significantly up to 200 kg N/ha. All these parameters also increased significantly with increasing the level of P application up to 150 kg /1ia. 1-lowever. the treatment combination N2 P350 showed the maximum plant height at harvest (93.62 em), number of flowers per plant (49.86),number of fruits per cluster(3.99), number of fruits per plant (38.30) and rate of fruits setting (76.82%). On the other hand, the treatment combination N200P1 00 produced (lie maximum fruit weight (2.5 kg/plant) and fruit yield (89.93 1./ha). N, P and K concentrations in straw and fruit were the highest in N200P150 treatment. The treatments had no significant effect on pH of post harvest soil. 1-lowever, increasing the N application up to 200 kg/ha increased soil total N and available K o significantly and P content up to N 150 treatment. Application of' P had no significant effect on total nitrogen but P1 50 produced the highest P and K content in soil. N 200P150 combination had the highest N (0. 119%) and P (44.77 ppm) concentration in plant.