8/10/2019 The Effect of Yeast Culture on Average Daily Gain and Feed Efficiency in Broiler Chicks (0-2 weeks)

1/1

During the first week of growth, broiler c

pens 1 and 2 appeared to gain more weigfeed consumed. A possible explanation f

is intergroup miscommunication when m

correct diet to the correct pen. This study

addition of 0.01 and 0.02 % YC and obser

ADG or feed efficiency. In support of thes

Mansour et. al. (2011) reported that inclu

in broiler chick diets did not impact ADG

However, Gao et. al.(2008) reported tha

of YC in broiler diets increased ADG and f

These effects were only observed during

not during days 1-21 of the trial period. B

experiment only considered growth in ch

16, results are inconclusive; the trial perio

be extended for the possibility of obtaini

results.

The Effect of Yeast Culture on Average Daily Gain and Feed Efficiency

in Broiler Chicks (0-2 weeks)J. Carothers, A. Laudenschlager, S. Olsavsky, E. Overmyer, H. Solomon, K. Tschida

ABSTRACT

Introduction

Materials and Methods Results Discussion

Conclusion

aa a

aa

a

ab

a,b

a

bb,c

a a a

a

b b,c

a

bb,c a

b a,ca

b c

Acknowledgme

Recently in the animal production industry, much

concern has been raised about the use of antibiotics as

growth promoters due to the increased awareness of

the potential risk of antibiotic resistant bacteria.

Several studies have explored alternate growth

promoters that mitigate the risk. For example, yeast has

been used as a possible substitute. Yeast products are

considered natural growth promoters and have been

used successfully in ruminant diets to increase

production; however, similar conclusions in

monogastrics have been inconclusive (Gao et. al. 2008).

Various studies have reported inconsistent findings

when yeast culture (YC) is supplemented to broiler chick

diets. Al- Mansour et. al. (2011) concluded that

inclusion of 0.125% YC in broiler chick diets did notimpact ADG or feed efficiency, while Gao et. al.(2008)

reported that 0.25% inclusion of YC in broiler diets

increased ADG and feed efficiency. In this experiment,

the hypothesis was that the addition of YC to the diet

will improve ADG and feed efficiency in broiler chicks

(aged 0-2 weeks).

Al- Mansour, S., Al- Khalf, A., Al- Homidan

Fathi, 2011. Feed Efficiency and Bloo

Broiler Chicks Given a Diet SupplemeCulture. International Journal of Pou

603-607.

Gao, J., Zhang, H. J., Yu, S. H., Wu, S. G., Yo

Gao, Y. P. and Qi, G. H.2008. Effects o

broiler diets on performance and im

functions. Poultry Science, 87:1377

1384.pmid:18577619

Thirty, four-day old chickens were randomly selected and

divided evenly into six battery cages The groups of five were weighed and given ad libitum

access to feed for 12 days

Three diets:

0% Yeast culture (Control)

0.01% YC

0.02% YC

Two cages per diet

Monitored daily for mortality, feed availability, and water

access

Pen body weight and feed intake were recorded on days

0, 5, and 12

ADG, ADFI, and G:F were calculated at the end of the

experiment from weekly data

Statistical analysis (t-test) completed to determine

statistical significance

Figure 1: The effects of increasing amounts of YC on ADG in broiler chicks. Columns within

the time period that contain different superscripts are different (P