Measurement of crude protein requirement of cockerel finishers by two empirical methods

Two empirical methods, namely the orthodox or traditional and diet dilution technique, were used to measure the responses of 96 14-week-old Black Olympian cockerel finishers to graded dietary crude protein (CP) levels of 16, 18, 20 and 22 per cent on airdry basis in a 6-week trial. The diets were isocaloric (ca 2600 kcal kg-1 metabolisable energy). Both methods indicated that weight gains, feed conversion ratio, and protein efficiency ratio were optimized by diets containing 18 per cent CP level at minimal cost of feedper unit gain. The results, thus, confirm that both methods are equally good in predicting the CP requirements of finishing cockerels

Housefly maggot meal and poultry visceral offal meal as protein supplements in the diets of starter pullets chicks

No Abstract

Replacement value of poultry visceral offal meal for fish meal in layers' diets.

The effects of replacing imported fish meal (FM) with poultry visceral offal meal (PVOM) in the diets of 200 Isa Brown laying hens on their performance characteristics and economy of egg production during 22 to 38 weeks or age were examined. PVOM replaced FM on an equal protein basis at the graded levels or 1.18, 2.37, 3.55 and 4.73% of diet B,C,D, and E respectively. The control diet A contained 4% FM as the sole source of animal protein. All diets contained ca 16% crude protein while their calculated metabolisable energy was ca 2600 kcal/kg diet. Observations were made at intervals of 4 weeks and entire 16-week period. Neither feed intake nor egg weight was affected (P > 0.05) by dietary treatments during the 4, 28 day and entire 16-week periods. The results of feed intake: egg weight ratios on the respective diets for each 28-day period and entire study period showed significant differences (P < 0.05) and similarity in the values or this parameter between some dietary treatments but the effect of PVOM inclusion levels on this parameter did not follow any consistent trend to undermine the results of other parameters. Mean daily egg production was higher (P < 0.05) on diet A than on the rest diets during 22 to 26 weeks of age but these ditTerences gradually disappeared towards 38 weeks of age. Daily egg yields per 10 birds on diets D and E were similar but lower (P < 0.05) than on the rest diets whose egg yeilds were also similar for the entire 4 month period. 'The performance data for the 4·months period on mean daily feed intake (g/bird) stood at 78.81 (A), 80.32 (8), 85.31(C) 81.70(D) and 75.88(E) while the feed intake : egg weight ratios were 1.46(A), 1.51(B), 1.58(C), 1.52(D), and 1.41(E). Mean dally egg yields were 6.85, 6.88, 6.73, 6.25 and 6.14 for diets A,B,C,D and E respectively while mean (g) were 54.15(A), 53.23(8), 54,00(C) 53.75(D) and S3.88(E) for the same period. PVOM could not replace FM beyond 59.25% of its proportion in the control diet without detrimental effect on egg production, although higher inclusion levels of PVOM did not affect feed intake and egg size but could further reduce feed cost.Keywords: Poultry visceral offal meal, fish meat, protein, layer, performance

Replacement value of poultry visceral offal meal in the diet of broiler chickens

An experiment was conducted to evaluate the replacement value of poultry visceral offal meal (PVOM) substituting for fish meal (FM) on an equal protein basis in the diets or unsexed Ross-strain broiler chickens from day-old to 8 weeks of age. One hundred and fifty birds were allotted in groups of 10 into 15 equidimeosional floor pens with floor space of 0.189m2 per bird. There were three replicates per treatment diet, with 10 birds per pen serving as a replicate. Five treatment diets, each for the starter and finisher phases of 5-and 3-week duration respectively were fed ad libitum. Diet A (control) contained 8% FM which was gradually replaced with PVOM at 2.3,4.6,6.90 and 9.20% in diets B,C,D and E respectively for both phases. All the diets were isocaloric (ca 12MJ ME/kg) for both phases and isonitrogenous with 23 and 20% dietary crude protein contents for the starter and finisher diets respectively. Feed intake and feed conversion ratios (FCR) were similar (P > 0.05) on all diets in support or complete substitution. However, weight gain for 8 weeks on the control diet was better (P < 0.05) than those on FM/PVOM- and PVOM-diets whose weight gains were similar (P > 0.05). The mean feed intake values of 4.031, 3.936, 3.760, 3.870 and 3.715 kg/bird were obtained for birds receiving diets A,B,C,D and E respectively while the equivalent FCRs were 2.326, 2.352, 2.233, 2.326 and 2.340. The mean weiglat gaias for birds on diets A,B,C,D and E for 8 weeks were 1.824, 1.688, 1.689, 1.676 and 1.590 kg/bird respectively. The dressed weight and wrights of back, drumsticks, thighs and wings were similar (P > 0.05) for all diets in favour of complete substitution of FM with PVOM. Mean dressing percentages were 58.24 to 69.07%. It is concluded that PVOM could replace FM completely in broiler diets.Keywords: Broilers, visceral offal meal, fish meal, performance and carcass characteristics

Crude protein requirement of growing cockerels by diet dilution technique

No Abstract

Effect Of Dietary Protein Levels On The Performance And Carcass Characteristics Of Cockerel Finishers

A study was carried out to investigate the effect of dietary crude protein (CP) levels in diets of 2600kcal/kg metabolisable energy content on the performance and carcass characteristics of cockerel finishers. The experimental diets A, B, C, D and E contained CP levels of 140, 160, 180, : 200 and 220g/kg and they were produced by modified diet dilution technique. Response criteria such as weight gain and feed conversion ratio, among others, and carcass characteristics were measured. Results on performance and carcass characteristics, with the exception of the neck, intestinal weights and other visceral offals, revealed that these response criteria were optimized in the birds fed on 180g/kg dietary CP level. Beyond this level, it was not beneficial to feed higher CP levels. Itis therefore, concluded that the CP requirement of finisher cockerels is 18% on the bases of their performance and carcass characteristics.Keywords: Cockerel finishers, Dietary crude protein levels, performance, carcass characteristic

Protein and energy requirements of some cockerel starters in the tropics

No Abstract Available Ghana Jnl agric. Sci, Vol.36 2003: 69-7

The Effect of Animal and Plant Protein-Based Diets on the Crude Protein Requirement of Cockerel Starters

None Availabl