Efficacy of Multi-Enzymes in Poultry Diets
Multi-enzyme representation to broilers resulted in comparable growth performance.
With the increasing prices of raw materials used in poultry diets, the efficiency of production must rely on acquiring maximum nutrient utilization from different available feed materials. These raw materials entail maximizing the use of conventional and alternative ingredients which may contain a wide array of fibrous materials which are pervious to the animal’s endogenous enzymes. Exogenous multi-enzyme preparations capable of degrading a wide variety of substrates found in different raw materials are now being used to increase the value of feed materials and in turn, decreasing feed cost. In this regard, a series of trials were conducted to determine the effectiveness of a multi-enzyme preparation containing high enzymatic activities of xylanase, glucanase, galactosidase and mannanase in poultry.
Research and commercial farm data on the use of multienzymes in broiler diets
A university study was conducted to determine the effect of a multi-enzyme preparation tr.naopower, r.asy tsio Systems, Inc.) on the growth performance of broiler chickens fed low energy diets (Kunkuk University, 2000). A total of 300 broilers were utilized and randomly assigned to one of 3 treatments which consisted of 1.) PC contained adequate levels of all nutrients, 2.) NC which contained low levels of energy (96% ME), and 3.) NC + multi-enzyme at 0.02% (Grower diets ME 3100 Kcal/kg while finisher diets contained 2980 ME Kcal/kg. Results indicated that multi-enzyme supplementation to broilers fed low-energy diets (96% ME) resulted in comparable growth performance to those birds fed diets adequate in energy (Table 1).
This is further supported by a study conducted at the Central Luzon State University (Philippines) comparing the growth performance of broiler chickens fed diets with or without multi-enzyme supplementation in low energy diets. These data indicate that multi-enzyme supplementation resulted in improved nutrient utilization. The multi-enzyme preparation was able to compensate for the decrease in energy by releasing more from feed not normally available to the animal due to the lack of necessary enzymes capable of degrading different substrates found in different raw materials.
Research reports show that multienzyme releases not only energy but protein fractions as well. In this regard, an experiment was conducted at Harim farms in Korea to determine the efficacy of the same multi-enzyme supplemented at 0.02% on the growth performance of broilers fed low energy (4% ME down-specification) and CV (3% down-specification) diets. Control diets contained 320o kcal ME/kg, 22% CP and 3070 kcal ME/kg, 21% CP for the starter and finisher diets, respectively. Results indicate that broiler chickens fed low energy and CP diets supplemented with the multienzyme performed equally to those fed nutrient and energy adequate diets (Table 2). It further shows the efficacy of the multi-enzyme compared to several other available commercial enzymes on the growth performance of broilers. Collectively, these results suggest that not all commercially available enzyme preparations perform equally. This also indicates that appropriate testing and continuous evaluation of enzyme preparations should be done.
Another trial was conducted at MaruBeni Nishin Feed (Japan) using 200 birds (5 reps/treatment and 10 birds/rep). Treatments consisted of 1) PC or Positive control (Starter: 22% CP, 3050 ME Kcal/ Grower: 21% CP, 3150 ME Kcal. 2) PCE or PC + 0.02% EndoPower f3. 3)NC or negative control (Starter: 22% CP, 3000 ME Kcal,
Grower:21% CP,3050 ME Kcal) and 4) NCE or NC + 0.02% EndoPower B. All diets were supplemented with phytase. Consistent with previous data, results show the efficacy of the multi enzyme preparation in low energy broiler diets.
Research and commercial farm data on the use of multi-layer enzymes in layer diets
A study was conducted at the University of the Philippines at Los Banos to determine the effect of multienzyme supplementation on egg production performance of Whiteleghorn layers (i8 to 32 wks). Treatment diets were composed of a corn-soy based diet with (add-on application) or without multi-enzyme supplementation at 0.05% (Endopower,_Easy Bio Systems, Inc.). Results indicate that birds receiving diets supplemented with the multienzyme preparation consistently outperformed those receiving the basal corn-soy diets in terms of egg production, FCR, and occurrence of abnormal eggs (soft shelled, cracked, etc).
Two commercial farm trials were also conducted to further determine the efficacy of the same multi-enzyme preparation (Endopower) and a commercial multi-enzyme preparation on the egg production performance of both H&N (Trial 1) and Babcock (Trial 2) layer chickens. Birds were supplemented with their respective enzyme preparations with dietary energy levels lowered by at least 50 kcal. For trial 2, a negative control group was added to determine whether energy levels were, indeed low enough to accurately determine energy compensation by the enzymes under consideration. Results indicate that although both enzyme preparations were effective in compensating for the decrease in energy, however, EndoPower was
more effective in terms of improving egg production.
Commercial trials were continued to determine the efficacy of EndoPower and a commercial multi-enzyme preparation on the egg production performance of 16,490 H&N layer diets. Layer chickens supplemented with their respective enzyme preparations had their energy levels lowered by at least 50 kcal . As expected, results indicate that although both enzyme preparations were effective in compensating for the decrease in energy, Endopower was more effective in terms of improving egg production. These results also indicate the multi-enzyme under consideration can be applied at different stages of production.
Collectively, these experiments ‘indicate that the multi-enzyme supplementation using Endo-Power can increase animal performance and feedstuff value by removing ANF’s present in feed thereby improving nutrient availability and animal performance.
Table 1. Efficacy of a multi-enzyme preparation broiler chickens fed low energy diets
Item PC NC NC + Endopower
ADG, g 37.1b 35.2a 36.9b
Feed:gain 1.71 1.8 1.74
PC, consisted of a basal diet adequate in all nutrients; NC, consisted of a low energy diet (down-specified by 4% ME); Endonase was supplemented at o.02%. a,b P < 0.05
Table 2. Efficacy of Endonase on performance of broilers fed low energy and CP diets
Initial BW, g 43 46
BW at 31 d, g 1489 1501
FCR 1.57 1.55
Mortality, % 3.75 3.65
Production index 294.2 300.9
Production index was computed using the following equation: (% survival x DWG (g)/ 10 x FCR).
Table 3. Efficacy of Endonase on the performance of layer chickens
Egg production, % 81.0a 84.5b
FCR 1.75a 1.62b
Ave. egg weight, g 46.2a 49.5b
Abnormal eggs, % 2.1a 0.6%b
Abnormal eggs included soft and thin shelled, cracked and deformed eggs. *P<0.05.