EFFECT OF FEEDING FIBROLYTIC ENZYME MIXTURE IN DRY AND SOLUBILIZED FORMS ON THE PERFORMANCE OF RAM LAMBS FED JOWAR STOVER BASED TOTAL MIXED RATION
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Date
2017-11
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SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA
Abstract
ABSTRACT :
An enzyme cocktail containing Exogenous Fibrolytic Enzymes (EFE) was tested in a Completely Randomized Design (CRD) in 30 ram lambs (15.5±0.57 Kg) of about 3 months age, randomly divided in 5 equal groups and each group containing 6 animals to evaluate effect of supplementing EFE to TMR on the growth performance, nutrient digestibility, plane of nutrition, carcass characteristics and cost economics. Five treatments were formulated with TMR containing Concentrate:Roughage ratio 50:50 with no enzyme cocktail supplementation as T1 (control), T1 supplemented with 2.5 g of enzyme cocktail per animal per day in dry form (T2), T1 supplemented with 2.5 g of enzyme cocktail incubated overnight per animal per day in dry form (T3), T1 supplemented with 2.5 g of enzyme cocktail soluble in 50 ml of water per animal per day (T4) and T1 supplemented with 2.5 g of enzyme cocktail soluble in 50 ml of water incubated overnight per animal per day (T5). A growth trial for 120 days was conducted. After the end of the growth trial, a digestion trial was conducted to evaluate the effect of cocktail enzyme containing Cellulase, Hemicellulase, β-glucanase, Amylase and Protease on the nutrient utilization. A basal ration was formulated as control and EFE was added at different forms to make treatments 2 to 5. T5 recorded highest (P<0.05) weight gain (kg) indicating that feed incubated with enzymes would be utilized better for improving the performance. The weight gains (kg) for the treatment groups were in the decreasing order from T5 to T1. There was about 15% hike in the total weight gain (kg) for T5 as compared to T1. ADG (g) was in the order of T5>T4>T3>T2>T1 (105, 100, 101, 99 and 90 g/d, respectively). There was an increase (%) of 15, 6, 4 and 5 for T5 as compared to T1, T2, T3, T4, respectively. FCR was recorded lowest (P<0.05) for T5. EFE incubated groups recorded lowest FCR. The enzyme incubated group recorded more ADG (g) with lowest FCR, indicating the advantage of use of pre-ingestion enzyme substrate complex before entering the rumen. FCR was in the order of T1>T2>T3>T4>T5. No significant differences were observed for treatments in terms of ADFI (Kg). The digestibility of all nutrients with the exception of CF, were found to be non-significant. The CF digestibility was highest (P<0.05) for T5 followed by T4, T3, T2 and T1. They were in the order of T5>T4>T3>T2>T1. However the digestibility of DM, OM, EE and NFE linearly increased non-significantly from T1 to T5. The NDF digestibility was highest (P<0.05) for enzyme incubated group (T5).
Supplementation of enzymes increased (P<0.05) TDN (Kg/day), DE (Mcal/day) and ME (Mcal/day). Except for DMI and DCP, the digestibilities of other parameters were found to be significant at 5% level. The values of TDN, DE and ME were highest for T5 indicating that the feed incubated with EFE in solubilized form had higher digestibility. None of the carcass parameters like pre-slaughter weight (Kg), empty body weight (Kg), hot carcass weight (Kg), dressing percentage and the weights of other visceral organs were affected by enzyme treatment. Enzyme added treatments recorded higher (P<0.05) total feed cost (Rs) as compared to the control, indicating that enzyme supplementation increased the feed intake. However, the cost of the feed per kg gain showed a decreased trend for EFE added groups. It was the lowest but non-significant for the enzyme incubated feed in solubilized form. It was concluded that EFE added to TMR can promote the growth by increasing nutrient utilization and reducing the cost of production. EFE applied in solubilized form and fed to the lambs after incubation recorded higher growth rate and improved nutrient digestibility of certain nutrients.
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