EFFECT OF NITROGEN AND PHOSPHOROUS ON THE GROWTH AND YIELD OF TOMATO (Lvcopersiccm escuIena'uin Mill.)

Abstract

The experiment was conducted in the experimental field of Bangladesh Agricultural Research Institute (BAR!), Joydevpur, Gazipur, Bangladesh during the period from November 2006 to March 2007 to find out the effect of nitrogen and phosphorous on the growth and yield of tomato. The experiment considered of two factors as Factor A (Four levels of nitrogen): No. 0 kg N/ha; N1: 80 kg N/ha; N2: 160 kg N/ha and N3: 240 kg N/ha, Factor B (Four levels of phosphorous): P1 : 0 kg P2Oilha: P2: 25 kg P205/ha: P3: 50 kg P205/ha and P3: 75 kg P205/ha. The maximum plant height (126.92 cm) was recorded from N2 treatment consisting of 360 kg N/ha and the minimum plant height (112.23 cm) was recorded from No treatment i.e. control condition. The maximum yield (63.39 1./ha) was recorded from N3 treatment and the minimum yield (32.60 t/ha) was recorded from No treatment. The highest nitrogen content (1.88%) in shoot was recorded from N3 treatment and the lowest nitrogen content (0.82%) was recorded from No treatment. The highest phosphorous content (0.553%) in shoot was recorded from N3 treatment and the lowest phosphorous content (0.209%) was recorded from No treatment. The maximum total nitrogen (0.10%) was recorded from No and the minimum total nitrogen (0.09 kg/ha) in soil was recorded from N1, N2 and N3 treatment. The maximum total phosphorous (42.80 ppm) was recorded from N3 treatment and the minimum total phosphorous (39.97 ppm) in soil was recorded from N0 treatment. The maximum plant height (123.55 cm) was recorded from P2 treatment comprising of 50 kg P205/ha, while the minimum plant height (117.17 cm) was recorded from P0 treatment. The maximum yield (53.65 t/ha) was recorded from P3 treatment and the minimum yield (43.98 t/ha) was recorded from P0 treatment. The highest nitrogen content (1 .44%) of shoot was recorded from P3 treatment and the lowest nitrogen content (1.20%) in shoot was recorded from the P0 treatment. The highest phosphorous content (0.420%) of shoot was recorded from P3 treatment and the lowest phosphorous content (0.338%) in shoot was recorded from the P0 treatment. The maximum plant height (135.17 cm), maximum yield 68.35 kg/ha were recorded under the treatment combination of N2P3 as 160 kg N Tha + 75 kg P205 /ha. The height nitrogen content (2.020,lo) in shoot was recorded under the treatment combination of N3P3 where as maximum phosphorus content (0.599 %) was recorded under the treatment combination N2P3. Minimum yield and yield attributes were ihund under the treatment combination of N0P0