Conducted by BIPSU
, Started on 2014 -
Completed on 2014
Completed
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A feeding trial was conducted to study the effect of microbial phytase on the production
performance and energy, protein, calcium and phosphorus utilization in the three broiler strains
(Starbro, Arbor Acre-70 and Lohmann). Phytase was incorporated in the broiler diet at the
recommended rate of 0.020% in T2 diet, 0.015% in T1 diet and 0.025% in T3 diet. Data
were analyzed using the analysis of variance (ANOVA) in a randomized complete block design
(RCBD). The least significant difference (LSD) test was used to compare treatment means.
Consistently, Arbor Acre-70 fed with T3 diet consumed more feed (2651.00 g), significantly
obtained the highest body weight (1313.33 g), body weight gain (1271.67 g) and average daily
gain (36.33 g). The feed conversion of the birds in the different treatments was not significantly
different. However, Arbor Acre-70 on T3 diet showed the lowest feed conversion ratio (2.10)
which indicates that this strain is a better feed converter. Among the strains, Arbor Acre-70 on
T3 diet had the highest metabolizable energy availability (89.08%) and the highest percentage
of available calcium for utilization (90.00%). The utilizable protein of Starbro on T2 diet
(70.37%) and Arbor Acre-70 fed with T3 diet (70.34%) was comparable. The percentages of
phosphorus utilized by Arbor Acre-70, Starbro and Lohmann on T2 diet were 68.03, 59.18 and
58.50%, respectively. Raising Arbor Acre-70 broilers using a diet supplemented with 0.025%
phytase is very profitable. Supplementation of broiler diets with phytase improved production
performance and nutrient utilization of the birds.