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Ninety Starbro broilers of one month age having
an initial live weight 1150-1320 g for 15 days (finisher period) were
randomly assigned to six treatment which were fed on different levels
of soybean oil. In the finisher period (30th to 45th day), total live
weight gain of the broilers fed 4% (920 g) and 6% (961 g) soybean oil
diet were significantly higher than the broilers fed 0 (764 g), 2 (870
g), 8 (867 g) and 10% (782 g) soybean oil diets. Total feed intake was
gradually decreased with increasing levels of soybean oil in the diets.
Feed conversion efficiency (FCE) was gradually improved with increasing
levels up to 6% of soybean oil and then decreased with above the levels
(e.g. 8 and 10%) of soybean oil in the diets. Similarly, the cost benefit
ratio (CBR) of T2 (2.15) and T3 (2.17) groups
were significantly more satisfactory than the other treatment groups
(T0 = 1.92, T1 = 2.09, T4 = 1.97 and
T5 = 1.72). So, up to 6% soybean oil may be added in the
broiler finisher diet during hot weather in Bangladesh.