Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age
ABSTRACT: The study examined the effects of feeding broiler breeder pullets hydrolyzed whole yeast (HY) from hatch to 22 wk of age (WOA). A total of 524-day-old Ross 708 pullets were placed in floor pens (∼24 birds/pen) for the starter (0–4 WOA) and grower (5–18 WOA) phases, then transferred to the...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Poultry Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0032579123009033 |
| _version_ | 1797291814940573696 |
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| author | Anderson N. Maina Hagen Schulze Elijah G. Kiarie |
| author_facet | Anderson N. Maina Hagen Schulze Elijah G. Kiarie |
| author_sort | Anderson N. Maina |
| collection | DOAJ |
| description | ABSTRACT: The study examined the effects of feeding broiler breeder pullets hydrolyzed whole yeast (HY) from hatch to 22 wk of age (WOA). A total of 524-day-old Ross 708 pullets were placed in floor pens (∼24 birds/pen) for the starter (0–4 WOA) and grower (5–18 WOA) phases, then transferred to the egg production facility and redistributed to ∼20 birds/pen for the prelay phase (19–22 WOA). Two diets were allocated to pens (0–18 WOA; n = 11) and (19–22 WOA; n-12). The diets were a control corn and soybean meal diet formulated to meet specifications and control plus 0.05% HY (HY). Birds had ad libitum access to feed in the first week and daily feed allocation based on pen BW from 2 WOA. Birds had free access to water throughout the trial. Body weight (BW) and uniformity (BW CV) were monitored. Boosters for infectious bronchitis and New Castle disease vaccines were administered at 18 WOA, and samples of pullets bled for antibody titer 5-day later. One pullet/pen was randomly selected, weighed, bled for plasma biochemistry, and necropsied for organ weights, ceca digesta for short-chain fatty acids (SCFA), and leg bones morphometry. In the starter and grower phases, birds fed HY were lighter and gained less (P < 0.05) than control birds. However, there were no diet effects (P > 0.05) on growth, the BW prelay phase, or BW uniformity throughout the trial. There were no (P > 0.05) diet effects on breast, gastrointestinal, liver and bursa weights, serum antibody titers, plasma biochemistry, SCFA and bone attributes. However, pullets fed HY had heavier (P = 0.047) spleen and tended to have lower (P = 0.080) plasma concentrations of aspartate aminotransferase (AST) relative to control pullets. In conclusion, the parameters assessed showed no negative consequences of feeding HY to broiler breeder pullets. However, effects on the spleen and plasma AST may indicate modest modulation of immunity and metabolism. The impact of the provision of HY during broiler breeder pullet phase on reproductive performance and chick quality should be investigated. |
| first_indexed | 2024-03-07T19:43:12Z |
| format | Article |
| id | doaj.art-20fd4d87035f4da9a2f906958fc469ca |
| institution | Directory Open Access Journal |
| issn | 0032-5791 |
| language | English |
| last_indexed | 2024-03-07T19:43:12Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Poultry Science |
| spelling | doaj.art-20fd4d87035f4da9a2f906958fc469ca2024-02-29T05:17:11ZengElsevierPoultry Science0032-57912024-03-011033103383Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of ageAnderson N. Maina0Hagen Schulze1Elijah G. Kiarie2Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, CanadaLivalta, AB Agri Ltd., Peterborough, United KingdomDepartment of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada; Corresponding author:ABSTRACT: The study examined the effects of feeding broiler breeder pullets hydrolyzed whole yeast (HY) from hatch to 22 wk of age (WOA). A total of 524-day-old Ross 708 pullets were placed in floor pens (∼24 birds/pen) for the starter (0–4 WOA) and grower (5–18 WOA) phases, then transferred to the egg production facility and redistributed to ∼20 birds/pen for the prelay phase (19–22 WOA). Two diets were allocated to pens (0–18 WOA; n = 11) and (19–22 WOA; n-12). The diets were a control corn and soybean meal diet formulated to meet specifications and control plus 0.05% HY (HY). Birds had ad libitum access to feed in the first week and daily feed allocation based on pen BW from 2 WOA. Birds had free access to water throughout the trial. Body weight (BW) and uniformity (BW CV) were monitored. Boosters for infectious bronchitis and New Castle disease vaccines were administered at 18 WOA, and samples of pullets bled for antibody titer 5-day later. One pullet/pen was randomly selected, weighed, bled for plasma biochemistry, and necropsied for organ weights, ceca digesta for short-chain fatty acids (SCFA), and leg bones morphometry. In the starter and grower phases, birds fed HY were lighter and gained less (P < 0.05) than control birds. However, there were no diet effects (P > 0.05) on growth, the BW prelay phase, or BW uniformity throughout the trial. There were no (P > 0.05) diet effects on breast, gastrointestinal, liver and bursa weights, serum antibody titers, plasma biochemistry, SCFA and bone attributes. However, pullets fed HY had heavier (P = 0.047) spleen and tended to have lower (P = 0.080) plasma concentrations of aspartate aminotransferase (AST) relative to control pullets. In conclusion, the parameters assessed showed no negative consequences of feeding HY to broiler breeder pullets. However, effects on the spleen and plasma AST may indicate modest modulation of immunity and metabolism. The impact of the provision of HY during broiler breeder pullet phase on reproductive performance and chick quality should be investigated.http://www.sciencedirect.com/science/article/pii/S0032579123009033hydrolyzed yeastbroiler breeder pulletsgrowth and uniformityimmunocompetence |
| spellingShingle | Anderson N. Maina Hagen Schulze Elijah G. Kiarie Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age Poultry Science hydrolyzed yeast broiler breeder pullets growth and uniformity immunocompetence |
| title | Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| title_full | Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| title_fullStr | Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| title_full_unstemmed | Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| title_short | Response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| title_sort | response of broiler breeder pullets when fed hydrolyzed whole yeast from placement to 22 wk of age |
| topic | hydrolyzed yeast broiler breeder pullets growth and uniformity immunocompetence |
| url | http://www.sciencedirect.com/science/article/pii/S0032579123009033 |
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