Transcript Inactive Dried Yeast

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INACTIVE DRIED YEAST
(Saccharomyces cerevisiae)
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INACTIVE DRIED YEAST
• Inactive Yeast is known for its prophylactic action, increasing
the animal’s resistance to illness and improving performance,
this activity is often referred as “Unidentified Growth Factors” –
UGF.
• Due to its high palatability, Inactive Dried Yeast stimulates the
feed intake.
• Inactive Yeast is a great protein source, with good amino
acids balance and high levels of lysine and threonine and it is
also the best source for natural occurring B vitamins.
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ADVANTAGES OF YEAST USAGE
• Layers - Inactive Dried Yeast increases the
production factor, improves egg shell quality and
fertility.
•
Broilers - Inactive Dried Yeast should be used
mainly on initial phase (1 to 21 days old, or 1 to 10
days old), it decreases deleterious effects caused
by stress factors such as high temperature, over
population, mycotoxins contamination, etc.
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INDICATION OF USE
POULTRY
• Initial Phases
1.0% to 2.5% of total feed
• Other phases
0.5% to 2.5% of total feed
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FIELD TRIALS
INACTIVE DRIED YEAST
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THE USAGE OF INACTIVE DRIED YEAST IN
THE BROILER FEED.
BUTOLO, J.E., BUTOLO, E.A.F., NOBRE, P.T., SERAFINI, F.V.
EXPERIMENTAL DATAS:
•
Local: Supremais Research Center
•
Animals: 300 chickens (one day old)
•
Periods: 1-21, 21-35, 35-42 and 1-42 days.
•
Treatments: 0%, 2.5%, 5.0% and 7.5% of yeast inclusion.
•
Experimental Period: 71 days
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Broilers Weight Gain (g)
IDY (%) INITIAL WEIGHT (g)
0%
42.71
2.5%
42.87
5.0%
42.49
7.5%
42.93
1 to 21d 21 to 35d 35 to 42d
766,7
899.3
468.4
782.9
913.1
465.8
757.1
941.8
430.1
748.5
896.1
414.6
1 to 42d
2134.4
2161.8
2126.9
2059.1
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Broilers Feed Conversion
IDY (%)
0%
2.5%
5.0%
7.5%
1 to 21d 21 to 35d 35 to 42d
1.38
1.90
2.30
1.36
1.89
2.43
1.39
1.85
2.64
1.41
1.95
2.65
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CONCLUSION
• The best performance were reached with inclusion rate of
2.5% of Inactive Dried Yeast.
• The broilers fed with 2.5% of Inactive Dried Yeast showed
better (P>0.05) results of weight gain, feed intake and feed
conversion in the total period than the others treatments.
• The evidences suggest low levels of Inactive Dried Yeast
inclusion rate provided positive results to broilers performance.
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STUDIES ABOUT HEN FEEDING WITH GROWING
LEVELS OF INACTIVE DRIED YEAST
(Saccharomyces cerevisiae).
BOTELHO, F.G. A., BUTOLO, E.A.F., NOBRE, P.T.C., BUTOLO, J.E., LIMA, I.A.V., SERAFINI, F.V.
EXPERIMENTAL DATAS:
•
Local: Supremais Research Center
•
Animals: 360 ISA Brown hens (18 weeks old)
•
Treatments: 0%; 2.5%; 5.0% and 7.5% of yeast inclusion
•
Experimental Period: 16 weeks (4cycles)
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Table1. Average of hens productives parameters feeded with molasses yeast
Cycle
1
2
3
4
Total
Item
DWG (g)
DFI (g)
Laying (%)
DWG (g)
DFI (g)
Laying (%)
DWG (g)
DFI (g)
Laying (%)
DWG (g)
DFI (g)
Laying (%)
DWG (g)
DFI (g)
Laying (%)
0%
104.31
86.55
59.87
89.51
96.16
86.91
116.80
110.16
95.83
65.55
109.94
97.07
94.04
100.70
84.92
Molasses yeast inclusion
2.5%
5.0%
7.5%
140.83
158.06
177.25
90.02
92.98
92.67
59.27
66.76
62.25
99.17
92.77
68.27
100.97
105.02
103.68
91.52
94.79
94.45
121.52
83.54
87.53
111.50
112.58
111.81
95.83
97.67
94.24
64.22
62.29
52.20
110.41
113.09
111.76
96.17
96.53
95.58
106.43
99.17
96.32
103.25
105.92
104.98
85.70
88.94
86.63
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Cycle
1
2
3
4
Total
Item
Weight eggs (g)
FC (12 eggs)
FC (eggs mass)
Weight eggs (g)
FC (12 eggs)
FC (eggs mass)
Weight eggs (g)
FC (12 eggs)
FC (eggs mass)
Weight eggs (g)
FC (12 eggs)
FC (eggs mass)
Weight eggs (g)
FC (12 eggs)
FC (eggs mass)
0%
52.28
1.76
2.81
58.52
1.33
1.90
62.98
1.38
1.83
61.50
1.36
1.84
59.55
1.46
2.09
Molasses yeast inclusion
2.5%
5.0%
7.5%
53.00
52.96
52.48
1.86
1.68
1.81
2.92
2.64
2.87
59.17
59.65
59.10
1.32
1.33
1.32
1.87
1.86
1.86
63.60
63.49
63.00
1.40
1.38
1.43
1.84
1.82
1.89
61.85
61.52
60.53
1.40
1.41
1.42
1.88
1.90
1.95
60.10
59.96
59.35
1.49
1.45
1.49
2.13
2.05
2.14
DWG=daily weight gain; DFI=daily feed intake; FC(12 eggs)=feed conversion to twelve eggs; FC (egg mass)=feed conversion to mass of egg.
Cycle1 – 20 to 23 weeks; Cycle2 – 24 to 27 weeks; Cycle3 – 28 to 31 weeks; Cycle4 – 32 to 35 weeks; Total – 20 to 35 weeks
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RESULTS 1
• Weight gain - the linear growth of Inactive Dried Yeast in
feeds, provided increases on weight gain (P<0.04) in the 1st
cycle. In general, best results were obtained with 2.5% of
Inactive Dried Yeast inclusion rate.
• Eggs production (laying) - there was significant increase
(P<0.04) of eggs production only in the 2nd cycle. Best result
was achieved when using 5.0% of Inactive Dried Yeast.
• Eggs weight - 2.5% of Yeast addition improved the eggs
weight in the 2nd, 3th and 4th cycles (P<0.03).
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RESULTS 2
• Feed conversion - the lowest levels of Yeast
inclusion provided a better response in on feed
conversion rates.
• Yolk egg color - there was linear positive effect
(P<0.02) on the egg yolk color only on the 2nd cycle,
with inclusion of 2.5% of Inactive Dried Yeast.
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CONCLUSION
• It is feasible to add Inactive Dried Yeast up to 7.5% in the
hens feed, during the period of 19 to 35 weeks of age.
• Evaluating the two first cycles (27 weeks age), best results of
laying, daily weight gain, feed intake and feed conversion,
were found when used 5.0% of Inactive Dried Yeast.
• In the 3th and 4th cycles (28 weeks-), low inactive dried yeast
inclusion levels (2.5% and 5.0%) provided the best responses
on egg weight and feed conversion.
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