Enzyme complex containing carbohydrases and phytase improves growth performance and bone mineralization of broilers fed reduced nutrient corn-soybean-based diets

Abstract

One experiment was conducted to investigate the benefits of a multi-enzyme complex, containing carbohydrases (from Penicillium funiculosum) and phytase (bacterial 6-phytase) activities, on the performance and bone mineralization of broiler chickens fed corn-soybean meal diets. A total of 2,268 male broilers were allocated to 9 treatments, replicated 6 times, in a randomized complete block design from 1 to 43 d. A positive control (PC) diet formulated to be adequate in nutrients and 4 reduced nutrient diets (NC1 to NC4), with gradual decrease on AME, CP, and digestible amino acids (CP-dAA) and available P (avP) and Ca contents, with or without enzyme supplementation, were tested. The nutrient reductions applied were NC1 (-65 kcal/kg, -1.5% CP-dAA) and NC2 (-85 kcal/kg, -3.0% CP-dAA) both with -0.15 percent point avP and -0.12 percent point Ca and NC3 (-65 kcal/kg, -1.5% CP-dAA) and NC4 (-85 kcal/kg, -3.0% CP-dAA) both with -0.20 percent point avP and -0.16 percent point Ca. Supplementation of the NC diets with the enzyme complex increased ADFI (P<0.001), ADG (P<0.001), and reduced feed:gain (P<0.01). The magnitude of the enzyme effect in increasing feed intake and weight gain was greater for the diets with greatest reductions in avP and Ca. Enzyme supplementation increased (P<0.001) feed intake of birds fed on NC diets close to the level of feed consumption of the PC. Enzyme supplementation to NC diets resulted in all cases in lower (P<0.05) feed:gain than the PC. Enzyme supplementation to NC1 and NC3 diets restored bone mineralization to that of the PC, whereas ash and Ca with NC2 and NC4 diets and P with NC4 diet remained lower (P<0.05). These results suggest that the dietary supplementation with a multi-enzyme complex containing nonstarch polysaccharide enzymes and phytase is efficient in reducing the P, energy, protein, and amino acid specifications of corn-soybean meal diets.

Enzyme Supplementation of Broiler Feeds with Reduced Mineral and Energy Levels

“…Birds supplemented with enzymes presented similar tibial calcium weight. Francesch & Geraert (2009) found that reducing dietary nutrient levels resulted in reduced bone ash, calcium, and phosphorus contents in comparison with a standard diet. In addition, those authors observed that supplementing the nutrient-deficient diet with a xylanase, glucanase, and phytase blend, improved the bone mineralization of 21-d-old broilers, promoting similar results as those obtained with a standard diet.…”

Performance and some intestinal functions of broilers fed diets with different inclusion levels of sunflower meal and supplemented or not with enzymes

“…Results on the use of exogenous enzyme in broiler diets are contradictory. Some researchers undoubtedly point out that the increase in body weight gain is due to the effect of the use of carbohydratases (Mathlouthi et al, 2002;Francesch & Geraert, 2009;Hajati, 2010). Other authors reported an increase in diet digestibility, but not in broiler performance (Marsman et al, 1997;Kocher et al, 2000;Preston et al, 2000), whereas some did not observe any effect (Aftab, 2009).…”

The effects of phytase supplementation and dietary phosphorus level on performance and on tibia ash and phosphorus contents in broilers fed maize-soyabased diets

“…Several alternative methods have been devised over recent years in order to reduce the negative impact of phytate P on the environment and poultry performance. The use of one of these strategies, which includes the administration of microbial phytase, has increased remarkably since the early 1990s and has become a standard practice (Ceylan et al, 2003;Francesch and Geraert, 2009).…”