Effects of Phytase and Enzyme Complex Supplementation to Diets with Different Nutrient Levels on Growth Performance and Ileal Nutrient Digestibility of Weaned Pigs

Y H Shim,J H Lee,B J Chae

doi:10.5713/ajas.2004.523

Abstract

An experiment was conducted to investigate the effect of microbial phytase (Natuphos  ) supplementation in combination with enzyme complex (composed of enzymes targeted to SBM dietary components such as α-galactosides and galactomannans; Endo-Power  ) to diet with low nutrient levels on growth performance and ileal nutrient digestibility of weaned pigs. A total of 210 crossbred weaned pigs (Landrace×Yorkshire×Duroc), 6.68±0.98 kg of initial body weight, were randomly allotted to five dietary treatments, based on weight and age, according to a randomized complete block design. There were three pens per treatment and 14 pigs per pen. The dietary treatments were 1) CON (Control diet with no phytase and enzyme complex (EC)), 2) LP+EC 100 (Control diet with 0.15% unit lower available phosphorus (aP) level+0.1% phytase (500 FTU/kg diet) and 0.1% enzyme complex), 3) LP+EC 80 (Control diet with 0.15% unit lower aP level+0.08% phytase (400 FTU/kg diet) and 0.08% enzyme complex, 4) LPEA+EC 100 (Control diet with 0.15% unit lower aP and 3% lower ME and amino acid levels (lysine, methionine, threonine and typtophan)+0.1% phytase (500 FTU/kg diet) and 0.1% enzyme complex), 5) LPEA+EC 80 (Control diet with 0.15% unit lower aP and 3% lower ME and amino acid levels+0.08% phytase (400 FTU/ kg diet) and 0.08% enzyme complex). For the determination of ileal nutrients digestibility, a total of 15 T-cannulated pigs (initial body weight; 7.52±1.24 kg; 3 replicates per treatment) were used in the present study. Piglets were weighted and allotted into same dietary treatments as one in growth trial and phase I experimental diets were provided for ileal digestibility study. There was no significant difference (p>0.05) in average daily gain (ADG) and average daily feed intake (ADFI) among dietary treatments during the whole experimental period (0 to 5 weeks). However, piglets in LP+EC 100 group had a significantly higher gain/feed ratio (G:F) than piglets had in control (p<0.05). Crude protein, energy and phosphorus digestibilities were significantly improved when both of phytase and enzyme complex were supplemented at the revel of 0.1%, respectively to diets with low nutrient level (aP or (and) ME and amino acids) (p<0.05). Piglets in LP+EC 100 and LPEA+EC 100 groups showed significantly higher phosphorus content (%) in bone than that of piglets in control group (p<0.05). Supplementation of both of phytase and enzyme complex at 0.1%, respectively, to diet with low nutrient levels (aP or (and) ME and amino acids) significantly improved total ileal essential amino acid and nonessential amino acid digestibilities compared to control group (p<0.05). In conclusion, the results from the present study suggest that the simultaneous inclusion of phytase and enzyme complex to diets at recommended level is advantageous with respect to improving growth performance and nutrient digestibility of weaned pigs and may contribute to increased economic return when added to corn-soy based weaned pig diets. (Asian-Aust. J. Anim. Sci. 2004. Vol 17, No. 4 : 523-532)

Highlights

With the advancements in enzyme-producing technology as well as a better understanding of the role of enzymes in animal nutrition, the use of enzymes in pig diets is becoming more widespread and contributes to the reduction of environmental pollutants from animal manure.Microbial phytase is one of the most commonly used enzymes in monogastric animal diets
The dietary treatments were 1) CON (Control diet with no phytase and enzyme complex (EC)), 2) LP+EC 100 (Control diet with 0.15% unit lower available phosphorus level+0.1% phytase (500 FTU/kg diet) and 0.1% enzyme complex), 3) LP+EC 80 (Control diet with 0.15% unit lower aP level+0.08% phytase (400 FTU/kg diet) and 0.08% enzyme complex, 4) LPEA+EC 100
(500 FTU/kg diet) and 0.1% enzyme complex), 5) LPEA+EC 80 (Control diet with 0.15% unit lower aP and 3% lower ME and amino acid levels+0.08% phytase (400 FTU/ kg diet) and 0.08% enzyme complex)

Summary

Introduction

With the advancements in enzyme-producing technology as well as a better understanding of the role of enzymes in animal nutrition, the use of enzymes in pig diets is becoming more widespread and contributes to the reduction of environmental pollutants from animal manure. Microbial phytase is one of the most commonly used enzymes in monogastric animal diets. The efficacy of microbial phytase in improving overall phosphorus availability in monogastric animals is clearly established (Coelho and Kornegay, 1996). Current evidence shows that there are the additional benefits of improved amino acids and energy utilization Received February 12, 2003; Accepted December 19, 2003 al., 1999ab). Not all of the data indicate that phytase affects AA and energy availability. Not all of the data indicate that phytase affects AA and energy availability. Biehl and Baker (1997) reported no effect of phytase on true nitrogencorrected ME in cecectomized roosters fed dehulled SBM

Objectives

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