Effect of Feeding Natuzyme on Broiler Performance

S. Attamangkune, A. Plaiboon, S. Sa-nguanphun,and O. Trivuttanon.

Poultry Research and Development Center and Department of Animal Science

Kasetsart University, Kamphaengsaen Nakhon Pathom, Thailand.

Introduction

Animal feeds depend mostly on vegetable-origin feed ingredients. These plant ingredients contain the considerable quantities of non-starch polysaccharides (NSP). Traditionally, NSP were considered to play a minor role in mono-gastric animals such as poultry and pig. However there is recently evidence that NSP have anti-nutritional properties and result in lower utilization of dietary energy. Therefore, the proper designs of exogenous enzymes and supplement into the basal diet are able to make available the energy stored in NSP. In this experiment the supplementation of Natuzyme Wet P containing cellulase, xylanase, beta-glucanase, alpha-amylase, and pectinase were elucidated when the metabolizable energy values of the broiler’s basal diet were reduced from 2.5 to 7.5%. Therefore, the objective of this experiment was to determine the efficacy of Natuzyme Wet P on broiler performance rearing from day old to 49 days of age.

Materials and Methods

One thousand and six hundred day-old straight run Arbor Acres broiler chicks were randomly assigned to 4 dietary treatments. Each treatment consisted of 8 replicates with 50 birds per replicate.   The basal diets (Control diets) were as following : the starter diet (22%CP and 3,100 Kcal ME/kg) from 0-21 days of age; the grower diet (20%CP and 3,150 Kcal ME/kg) from 22-42 days of age; and the finisher diet (18%CP and 3,200 Kcal ME/kg) from 43-49 days of age. Bambermycin and Salinomycin at the levels of 5 and 66 g/ton of feed were used as growth promotant and anticoccidial agent, respectively. The birds were reared on the concrete floor using rice hull as the litter material. Feed (mash feed) and water were provided ad libitum.

The dietary treatments (Tables 1-3) were (1) the Control ; (2) 2.5% reduction in metabolizable energy of the control diet and supplemented with Natuzyme Wet P at the level of 1 kg/ton; (3) 5.0% reduction in metabolizable energy of the control diet and supplemented with Natuzyme Wet P at the level of 1 kg/ton; and (4) 7.5% reduction in metabolizable energy of the control diet and supplemented with Natuzyme Wet P at the level of 1 kg/ton;

The body weight and feed consumed were measured at 0, 21, 42, and 47 days of age and used to determine the body weight gain, feed consumption, and feed gain ratio during 0-21, 22-42, and 43-49 days of age, respectively.

All the data were subjected to the Analysis of Variance and the significant difference among treatment means were obtained by Tukey’s Honestly Significant Difference.

Results and Discussion

The effect of feeding Natuzyme Wet P on broiler performance during 0-21, 22-42, and 42-49 days of age are shown in Tables 4-6. At 0-21 days of age (Table 4), the supplementation of Natuzyme Wet P at the level of 1 kg/ton together with the reduction of dietary metabolizable energy from 5.0 to 7.5% exhibited the increase in feed consumption (p=.0901) and decrease in body weight gain (p=.0052) and feed efficiency (p=.0012). However, the supplementation with the reduction of 2.5% of dietary metabolizable energy showed no significant difference on broiler performance from the control diet.

At 22-42 days of age, the birds fed with Natuzyme Wet P were able to handle the reduction of dietary metabolizable energy from 2.5 to 5.0% without any detrimental effects from the control group (Table 5). The further reduction of dietary metabolizable energy to 7.5% showed the negative effects on feed consumption (p=.0074) and feed efficiency (p=.0296).

At 43-49 days of age, there were no significant differences on body weight gain, feed consumption, and feed efficiency (Table 6) among the dietary treatments. Birds fed with Natuzyme Wet P were able to utilize the reduction of dietary metabolizable energy from 2.5 to 7.5% without negative effect compared to the control group.

From the experiment, the supplementation of Natuzyme Wet P in addition with the reduction of dietary metabolizable energy can be achieved depending on the levels of dietary metabolizable energy and the ages of the birds. During the starter period (0-21 days of age), the reduction of 2.5% from the basal 3,100 Kcal ME/kg diet and supplemented with Natuzyme Wet P at the level of 1 kg/ton resulted in the same broiler performance as the control group. Further reduction in dietary metabolizable energy demonstrated the inadequate amount of energy that the birds received daily and consequently increased the feed consumption of the birds in order to maintain their adequate energy requirements.  The reduction of dietary energy can be greater (5.0% during 22-42 days of age with the basal dietary metabolizable energy of 3,150 Kcal ME/kg and 7.5% during 43-49 days of age with the basal dietary metabolizable energy of 3,200 Kcal ME/kg) when the birds get older and are able to handle higher levels of dietary crude fiber. 

Under the conditions of this study, the supplementation of Natuzyme Wet P at the level of 1 kg/ton can be done by the reduction of 2.5% of 3,100 Kcal ME/kg during the starter period, 5.0% of 3,150 Kcal ME/kg during the grower period, and 7.5% of 3,200 Kcal ME/kg during the finisher period without any detrimental effects from the control diet.

Table 1. Experimental diets for broilers from 0-21 days of age (Starter diet)

Table 2. Experimental diets for broilers from 22-42 days of age (Grower diet)

Table 3. Experimental diets for broilers from 43-49 days of age (Finisher diet)