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'n Ondersoek na die aanvaarbaarheid van aminosuur fase voeding op eierproduksie

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dc.contributor.author Scharlach WG Walter en
dc.date.accessioned 2016-09-26T06:26:35Z
dc.date.available 2016-09-26T06:26:35Z
dc.date.submitted 1988 en
dc.identifier.uri http://hdl.handle.net/20.500.11892/173877
dc.description.abstract An experiment was conducted to investigate the acceptability of amino acid phase feeding during egg production. Ross hens were allocated at random to 4 treatments, each replicated 12 times. During the first 20 weeks of production all treatments were kept on the control diet, which supplied amino acids to maintain a 60g/hen egg output. The last 23 weeks were split into 3 phases of a phase feeding program. During phase 1, the 21 - 30 week period, 3 treatments remained on the control diet, while treatment 2 was fed on a diet which supplied amino acids to maintain a 56g/hen egg output. The 31-40 week period served as phase 2, where treatments 1 and 4 were kept on the control diet, while treatments 2 and 3 received a diet which only supplied amino acids for a 52g egg output. Phase 3 was the 41-48 week period, during which treatment 1 served as control, while all other treatments were fed for a 48g/hen egg output. Phase feeding had a detrimental effect on egg output during each phase, in that it reduced egg numbers and egg mass. The decline in egg output was significant during phase 2 (p<0,05). During phases 1 and 2 feed intakes declined initially with a fall in egg output. There was however, no significant average difference in feed intake (p>0,05). Energy and feed utilization were adversely affected throughout this trial, although these differences were only significant during phase 2 (p<0,05). Amino acid utilization and cost per dozen eggs was improved for phase fed treatments (p<0,05). The importance of body reserves could be seen in that egg output of previously under fed treatments tended to be more depressed than the egg output of treatments phase fed for a first time (p>0,05). The reduction in total eggs produced resulted in no improved profit margins for phase fed treatments. It is concluded that although phase feeding improved amino acid utilization significantly, the reduction in total eggs produced did not result in improved profit margins. en
dc.language Afrikaans en
dc.subject Animal production en
dc.subject Agriculture en
dc.title 'n Ondersoek na die aanvaarbaarheid van aminosuur fase voeding op eierproduksie en
dc.type Masters degree en
dc.description.degree MSc(Agric) en

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