Oxidative stability and bacteriological assessment of meat from broiler chickens fed diets containing Hibiscus sabdariffa calyces

Thigh muscles were obtained from a batch of 120 broiler chickens fed diets containing 0, 1.5, 3.0, 4.5 and 6.0% dried Hibiscus sabdariffa calyces (diets A, B, C, D and E respectively). The thigh muscleswere studied as uncooked and steam-cooked, and refrigerated for up to 9 days. Oxidative stability of muscle was measured using the thiobarbituric acid test and bacteria isolates were identified andquantified. Moisture and lipid contents of muscle were not affected (P>0.05) by dietary treatments. Oxidation of refrigerated meat decreased (

Nutritive evaluation of Telfairia occidentalis leaf protein concentrate in infant foods

Leaf meal (LM), leaf proteins concentrate (LPC) and LPC residues from Telfairia occidentalis were produced, chemically characterized and the protein quality of the LPC evaluated using rats. Five infant weaning foods were formulated using varying combinations of T. occidentalis LPC and soybean meal. These foods were compared with three coded commercial infant weaning foods (CFF, CFN and CFC) currently in trade in a 28-day performance study. Though fractionation increased crude protein in LPC by 34.8%, the amino acid values were in most cases lower than the FAO/WHO/UNU recommendation. Fractionation led to increase in the gross energy by 22.0% and decrease in the phytate and tannin contents by 60 and 81.3%, respectively in LPC. The LPC, when fed as sole protein source, led to weight loss in rats. The highest final weight was observed in rats fed 100% LPC + 0% soybean meal-basedfood (105.4 ± 16.4 g) and least in CFN (50.0 ± 4.2 g), a commercial food. The formulated foods had significant (

Food ingredient selection by growing and finishing pigs: effect on performance and carcass quality

AbstractThe aim was to investigate if selection of a balanced diet by growing and finishing pigs from foods differing in protein content is modified by the intrinsic nutrient and chemical properties of the high protein food ingredient offered. The treatments were as follows: a free-choice was offered between milled barley and either soya-bean meal (SBM) or low-glucosinolate rapeseed meal (RSM) or an equal mixture of SBM and RSM (SBM+RSM). In two further treatments (SBM/RSM and RSM/SBM) the protein supplements were changed when pigs reached 50 kg. These were compared with a control diet (CONT) formulated to provide 13-0 MJ digestible energy (DE) and 10 g lysine per kg and containing barley (680 g/kg), SBM (150 g/kg) and RSM (150 g/kg). A total of 72 pigs weighing about 30 kg were randomly allocated to the treatments in groups of six (three boars and three gilts). Pigs were slaughtered at about 90 kg and the chilled carcasses were assessed by measuring subcutaneous fat depths and cross-sections of the eye-muscle at the last rib. Responses from 30 to 90 kg on treatments CONT, SBM, RSM and SBM+RSM were, for food intake 2·57, 2·37, 2·21 and 247 (s.e. 0·08) kg/day (P &lt; 0·05), for growth rate 0·93, 0·87, 0·70 and 0·82 (s.e. 0·05) kg/day (P &lt; 0·05) and for food conversion 2·77, 2·72, 3·17 and 3·01 (s.e. 0·181) kg food per kg growth (P &gt; 0·05) respectively. The amount of protein supplement selected in the diet from 30 to 90 kg on treatments SBM, RSM and SBM+RSM averaged 524, 495 and 483 (s.e.d. 64·9) g/kg respectively. With SBM this proportion decreased with increasing body weight (P &lt; 0·01; R2 = 0·58). Changing RSM to SBM at 50 kg increased preference for the protein supplement and intake of SBM averaged 983 g/kg from 50 to 90 kg. On the other hand, switching from SBM to RSM increased preference for barley and intake of RSM averaged 572 g/kg. There were no significant differences in carcass quality but treatments RSM and SBM/RSM tended to produce increased fat depths. In conclusion, the use of RSM did not give a satisfactory level of -performance under the restricted free-choice feeding environment of this study. Preference and nutrient intake were adversely modified by RSM possibly due to the undesirable effects of antinutritive factors.</jats:p

Performance Characteristics And Muscle Fat Contents Of Broiler Chicken Finishers Fed Diets Containing Palm Oil Sludge In Partial Replacement For Maize

This study was carried out to asses the effect of substituting maize at 10, 20, 30 and 40% of energy supplied by maize in a control diet (500 g/kg maize based) with energy from palm oil sludge (POS) on performance, muscle fat content and cost of production of 4-week old broiler chickens. A total of 200 starter Shaver Starbo broilers were randomly allotted to the 5 diets at 10 birds per replicate and 4 replicates per treatment. The diets were iso-nitrogenous and iso-caloric. The feeding trial lasted 4 weeks during which weekly feed consumption and group live weights were measured. Sixteen birds per treatment were sacrificed and dissected to assess the belly fat and total lipid contents of selected muscle.Final live weight, weight gain and feed conversion ratio of birds did not differ significantly (P>0.05). Feed intake was significantly influenced (

Influence of housing conditions and type of finishing feeds on the oxidative stability of broiler-chicken muscles

No Abstract

Performance Characteristics And Muscle Fat Contents Of Broiler Chicken Finishers Fed Diets Containing Palm Oil Sludge In Partial Replacement For Maize

This study was carried out to asses the effect of substituting maize at 10, 20, 30 and 40% of energy supplied by maize in a control diet (500 g/kg maize based) with energy from palm oil sludge (POS) on performance, muscle fat content and cost of production of 4-week old broiler chickens. A total of 200 starter shaver starbo broilers were randomly allotted to the 5 diets at 10 birds per replicate and 4 replicates per treatment. the diets were iso-nitrogenous and iso-caloric. the feeding trial lasted 4 weeks during which weekly feed consumption and group live weights were measured. sixteen birds per treatment were sacrificed and dissected to assess the belly fat and total lipid contents of selected muscle. Final live weight, weight gain and feed conversion ratio of birds did not differ significantly (P&#61502;0.05). feed intake was significantly influenced (