INTRODUCTION
Major advances have occurred in poultry in the last decades, thus making it one of the most developed segments of world agriculture. Many researchers have been conducted in nutrition area in search of alternatives to enable the formulation of rations and more efficient economical, in view of that power has the largest cost in the production of broilers.
The use of enzymes improves the nutritional value of diets based on soybean meal and corn, due to the ability of these enzymes to neutralize the anti-nutritional factors such ingredients thereby promoting better animal performance.
Enzymes in the diet and improves the efficiency of poultry production by increasing the digesting products of low quality and reducing the loss of nutrients in the faeces as reductions in levels of energy, protein and amino acids in the formulation of diets for broilers (Torres et al., 2003).
Thus, the objective was to evaluate the effect of using an enzyme complex on the performance of broilers from 1 to 35 days of age.
MATERIAL AND METHODS
A total of 640 male Cobb broilers will be evaluated from 1 to 35 days post hatch. The birds will be assigned to 4 treatments, with 8 replicates of 20 animals each, distributed in a randomized experimental design. The feed will be provided in 3 phases as follow: Starter (1 to 10 days) and Grower (11 to 35 days).
A Positive Control (PC) diets will be formulated to fulfill the requirements for each phase. The Negative Control (NC) diets will be formulated considering the matrix value of the enzyme combination (Phytase+ Amylase+ Xylanase+ Protease) however without any enzyme complex added.
The treatment 3 will be the Treatment 1 (Positive Control) plus the enzyme combination (PC-E) and the treatment 4 will be the treatment 2 (Negative Control) plus the enzyme combination (NC-E). Enzyme Combination: 200g ProAct + 400g Ronozyme A + 100g Ronozyme WX + 20g HiPhos (M) per metric ton. This enzyme combination will be provided mixed, ready to use.
Statistical analyzes were performed using the Statistical Analysis System and
Genetic (SAEG-8.0), developed by Federal University of Viçosa (1999), and comparisons performed by means of the SNK test at 5% probability.
RESULTS AND DISCUSSION
The weight gain and feed conversion were influenced by treatments (P<0.05) (Table 1). The weight gain of Negative Control was different (P<0.05) to others treatments, but the PC, PC-E and NC-E didn’t differ (P>0.05).
Table 1. Final weight (FW, g/bird), weight gain (WG, g/bird), feed intake (FI, g/bird) and feed conversion (FC, g/g) of broilers from 1 to 10 days of age
Means followed by same letter do not differ statistically by SNK test at 5% level of probability.
The weight gain and feed intake were influenced by treatments (P<0.05). The Negative Control shows a poor weight gain and feed intake, but the values aren’t differing the Positive Control plus enzyme complex. In the feed intake, the behavior was similar, but the Negative Control was similar (P>0.05) to Positive Control.
The weight gain and feed intake observed at treatment Negative Control plus enzyme complex was similar the Positive Control (P>0.05). The results showed the efficiency at enzyme complex in improve the availability of nutrients to broiler fed with diets with nutritional reductions, especially in calcium and available phosphorus
Table 2. Final weight (FW, g/bird), weight gain (WG, g/bird), feed intake (FI, g/bird) and feed conversion (FC, g/g) of broilers from 11 to 35 days
Means followed by same letter do not differ statistically by SNK test at 5% level of probability.
CONCLUSION
The enzyme complex improves the availability of nutrients, retrieving the performance of broilers fed with nutritional reductions.
REFERENCES
TORRES, D.M., TEIXEIRA, A.S., RODRIGUES, P.B. (2003) Eficiência das enzimas amilase, protease e xilanase sobre o desempenho de frangos de corte. Ciências Agrotecnica, Lavras. v.27, n.6, p.1401-1408, nov./dez.
UNIVERSIDADE FEDERAL DE VIÇOSA – UFV. (1999) Manual de utilizaqção do programa SAEG – Sistema de Análise Estatística e Genética. Viçosa, MG: Universidade Federal de Viçosa, 59p.
