{"corpus_id":253200895,"paper_sha":"11a1f6fceb80ec9fa4e8fc9a601bafcf8a826bec","doi":"10.15666/aeer/2004_35193529","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":null,"dblp_id":null,"acl_id":null,"title":"GROWTH AND PRODUCTION RESPONSES OF BOSCHVELD CHICKENS TO BAKERS’ YEAST SUPPLEMENTATION","year":2022,"publication_date":null,"venue":"Applied Ecology and Environmental Research","journal":{"name":"Applied Ecology and Environmental Research","pages":null,"volume":null},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":[],"reference_count":34,"citation_count":0,"influential_citation_count":0,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":". The purpose of this study was to determine the impact of probiotic-yeast supplementation on growth and productivity of Boschveld chickens reared intensively from 1 - 91 days of age. Birds were raised on commercial starter mash (1 - 49 days) and grower mash (50 to 91 days). Six hundred unsexed Boschveld chicks with a mean live weight of 27.8 ± 1.07 g were allotted into six treatment groups. Each group was divided into five replicates of 20 chickens. Birds in each group were assigned to a diet containing 18 -20% crude protein and 3001.38 - 3009.98 Kcal/kg energy, but with increasing levels of bakers’ yeast (TS) at 0 (TS0), 2.5 (TS2.5), 5.0 (TS5), 7.5 (TS7.5), 10.0 (TS10) and 12.5 g/kg feed (TS12.5). Experimental chickens were raised in a deep litter house; feed and water were given ad libitum. Data on growth performance indices, apparent metabolizable energy (AME) and nitrogen retention were collected and analysed statistically at p < 0.05. Treatment means where significant were separated using Duncan’s test for multiple comparisons. Results revealed that dietary probiotic-yeast supplementation had no significant influence on feed intake and AME in Boschveld chickens. Chickens fed treatment diets had better final live weight (FLW), feed conversion efficiency (FCE), average daily gain (ADG) and nitrogen retention in comparison with chickens fed control diet. Our results demonstrated that probiotic-yeast supplementation at 5.0, 7.5 and 10.0 g/kg feed had a positive effect on performance indices of indigenous Boschveld chickens reared in a closed confinement from 1 up to 91 days of age. Similar results were found in Indonesia's native chickens (Ma’rifah The present findings show that nitrogen retention value increased progressively as the amount of yeast in the diet was increased, and thereafter declined, which is similar to the finding of Mbajiorgu et al. (2011) in South African unsexed Venda chickens. The significantly higher nitrogen retention recorded in birds fed treatment diets indicates the ability of the diets to support muscle development leading to better growth. This also suggests greater efficiency of the use of nitrogen in birds fed treatment diets over the control diet. Oyedeji et al. found a similar pattern in Ross 355 broiler chickens offered yeast culture at 0.2, 0.25 and 0.3 g/kg feed. Furthermore, the significant decline in nitrogen retention value of birds offered yeast at 12.5 g/kg feed in comparison with birds fed yeast at 7.5 g/kg indicates that 12.5 g yeast/kg feed could be higher than the level the Boschveld chickens could utilize.","claims":[{"public_id":"cl_8023c2175b4ccc45bdce266a5351461c","status":"active","text":"Birds receiving yeast-supplemented diets showed better final live weight, feed conversion efficiency, average daily gain, and nitrogen retention than birds on the control diet.","confidence":0.97,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_8023c2175b4ccc45bdce266a5351461c"},{"public_id":"cl_83e95b491d59f63025879ca124198a01","status":"active","text":"Dietary bakers’ yeast supplementation had no significant influence on feed intake or apparent metabolizable energy in Boschveld chickens.","confidence":0.98,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_83e95b491d59f63025879ca124198a01"},{"public_id":"cl_101a6ce5c26f83cfb866c2280bf5f0b8","status":"active","text":"Nitrogen retention increased progressively as dietary yeast level increased and then declined, with 12.5 g/kg feed producing lower nitrogen retention than 7.5 g/kg feed.","confidence":0.9,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_101a6ce5c26f83cfb866c2280bf5f0b8"},{"public_id":"cl_017141910720bc41acc445ec255d4fbf","status":"active","text":"Supplementation at 5.0, 7.5, and 10.0 g/kg feed had a positive effect on performance indices of Boschveld chickens reared in confinement from 1 to 91 days of 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