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Dafwang I.I.,National Agricultural Extension Research Laison Services | Sekoni A.,National Animal Production Research Institute | Jegede J.O.,National Animal Production Research Institute
Asian Journal of Poultry Science | Year: 2013

A study was conducted to compare maize and Sweet Potato Meal (SPM) as sources of energy in grower chickens' diets while another was conducted to determine the effect of SPM on the performance of the birds used in the grower study. A total of 210 pullets aged 10 weeks of Shika Brown breed were used for the grower study, while a total of 180 chickens aged 23 weeks acquired from the proceeds of the first study were used for the layer study. Five treatments comprising of diets containing 0, 10, 20, 30 and 40% levels of SPM were applied in both experiments in a completely randomized manner and performance of birds were monitored at both phases. Each of the experiments lasted 12 weeks. Result of grower study showed that the control, 10 and 20% SPM diets produced similar weight gain, final weight, feed efficiency and feed cost kg-1 weight gain and were superior (p<0.05) to 30 and 40% SPM diets. Result of the layer experiment showed that the control, 10 and 20% SPM diets produced similar final body weight, weight gain, feed intake, hen-day egg production and cumulative egg production/bird which were significantly better (p<0.05) than those produced by the 30 and 40% SPM diets. Ages at 1st egg and at 5% production were least (p<0.05) for the control birds while the age at 50% production was least for the 10% SPM diets. From the result, it is inferred that grower chicken or young layers should not be fed with diets containing more than 20% SPM. © 2013 Academic Journals Inc.


Chiezey N.P.,National Animal Production Research Institute
Livestock Research for Rural Development | Year: 2010

Following manifestations of alopecia, hair pulling and diarrhea in a flock of confined sheep, an investigation was carried out in which clinical observations, and sample analysis were used in arriving at a diagnosis. The animals consisted of 60 Yankasa rams aged between 6 -18 months, which were being conditioned for experimental purposes. They had been held indoors for a period of two months to acclimatize, and were being fed a finely ground 12.7% crude protein concentrate ration, hay and trace mineral salt. Affected animals were seen to be loosing hair, some had diarrhoea and eventually two animals became recumbent and died. Post mortem revealed mats of hair strands in the rather fluid abomasal contents. Skin scrapings of other animals were negative for ectoparasites and faecal samples examinations yielded only the presence of a few coccidian oocysts (+). No specific explanation for the symptoms was apparent and so a nutritional problem was suspected. The finely ground feed was changed, and replaced with a coarse one and hay supplied ad libitum. The problem abated and the bare skin patches returned to normal about two months after the diet was adjusted. Continual feeding of concentrate diets of fine particle size may have negative effects on animal health and performance.


Dafwang I.I.,National Agricultural Extension Research Liason Services | Tegbe T.S.B.,National Animal Production Research Institute | Sekoni A.,National Animal Production Research Institute
Asian Journal of Poultry Science | Year: 2012

Sweet Potato Meal (SPM) was used to substitute maize on weight for weight basis as a dietary source of energy for starter and finisher chickens. The SPM was incorporated at 0, 10, 20, 30, 40, 50 and 60% levels in both studies without adjustments for energy and protein. Ross broiler chicks obtained from a local hatchery were used for the studies. Three replicates of 15 chicks each were randomly allocated to each of the 7 treatments in a Completely Randomized Design (CRD) for the starter phase while the number of birds was reduced to 14 per group for the finisher phase. Parameters measured or calculated include feed intake, body weight gain, feed efficiency, feed cost, feed cost/kg wt. gain, mortality and carcass characteristics. The starter phase study was on 1 to 5 week-old chicks while the finisher study was on 6 to 9 week-old chickens. The trend of results in the two phases were similar and showed that weight gain, feed intake and total cost of raising birds decreased significantly (p<0.5) while the feed cost/kg wt. gain and feed: gain ratio increased (p<0.05). The control, 10 and 20% SPM diets gave similar feed efficiency. The control gave the best performance, though its performance was not different (p>0.05) from those of the 10 and 20% SPM diets. Dietary SPM levels had no adverse effects on mortality and carcass characteristics. It is concluded that SPM should not be included beyond 20% level when substituted for maize on a weight for weight basis without adjusting the dietary protein and energy. © 2012 Academic Journals Inc.

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