scholarly journals Effect of dietary protease supplementation and sex on dressing percentage and body conformation in broilers

2016 ◽  
Vol 32 (2) ◽  
pp. 185-193 ◽  
Author(s):  
Vladimir Doskovic ◽  
Snezana Bogosavljevic-Boskovic ◽  
Milos Lukic ◽  
Zdenka Skrbic ◽  
Simeon Rakonjac ◽  
...  
Keyword(s):  
Body Weight ◽  
Protein Content ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Research Results ◽  
Fast Growing ◽  
Body Conformation ◽  
Broiler Diet ◽  
Carcass Conformation ◽  
Dressing Percentage

This paper presents research results on the effect of protease on the dressing percentage of conventionally dressed carcass and body conformation in broiler chickens. Broiler diet was supplemented with 0.2% protease (group E-I) and 0.3% protease (group E-II), and protein content in the feed was reduced by 4% (E-I) and 6% (E-II) through a decrease in soybean meal content. Fast-growing Cobb 500 broilers were used for a 63-day fattening trial. Body conformation measurement included absolute carcass conformation measures (metatarsus length, keel length, breast depth, breast angle, thigh girth) and relative body conformation measures - conformation indices (body weight/metatarsus length, body weight/keel length, body weight/breast depth, body weight/thigh girth). Results showed a significant effect of sex on the dressing percentage of conventionally dressed carcass and all body conformation measures, whereas diet had a significant effect on the dressing percentage of conventionally dressed carcass and breast angle values.

scholarly journals The effect of protease on productive and slaughter traits in broiler chickens

2012 ◽  
Vol 28 (4) ◽  
pp. 817-826
Author(s):  
V. Doskovic ◽  
S. Bogosavljevic-Boskovic ◽  
Z. Pavlovski ◽  
B. Milosevic ◽  
Z. Skrbic ◽  
...  
Keyword(s):  
Body Weight ◽  
Broiler Chickens ◽  
Abdominal Fat ◽  
Carcass Weight ◽  
Production Traits ◽  
Fast Growing ◽  
Protein Levels ◽  
Carcass Conformation ◽  
Slow Growing ◽  
Protein Diets

Carcass conformation is a very important parameter in assessing the overall appearance and meatiness of broilers. This study evaluates the effect of protease supplemented to reduced protein diets on production traits, dressed carcass weight and conformation measures in fast-growing Cobb 500 and slow-growing Master Gris broilers over a fattening period of 49 days. At slaughter, the following measurements were taken: pre-slaughter body weight (BW), conventionally dressed carcass weight and abdominal fat weight. Following carcass dissection into primal cuts, absolute conformation values, including metatarsus length (ML), keel length (KL), breast depth (BD), breast angle (BA) and thigh girth (TG), were determined. For carcass conformation evaluation purposes, index values of carcass conformation measures BW/ML, BW/KL, BW/BD and BW/TG were identified. Genotype and sex had a significant effect on dressed carcass weight and all conformation measures, whereas the effect of different protein levels in protease-supplemented diets was significant only in Master Gris, for metatarsus length and the following indices: BW/ML, BW/KL and BW/TG.

scholarly journals Effect of Lactococcus lactis vs. Lactobacillus spp. bacteria on chicken body weight, mortality, feed conversion and carcass quality

2012 ◽  
Vol 12 (4) ◽  
pp. 549-559 ◽  
Author(s):  
Franciszek Brzóska ◽  
Bogdan Śliwiński ◽  
Krystyna Stecka
Keyword(s):  
Body Weight ◽  
Lactobacillus Plantarum ◽  
Lactococcus Lactis ◽  
Broiler Chickens ◽  
Liver Weight ◽  
Blood Parameters ◽  
Feed Consumption ◽  
Control Group ◽  
Feed Conversion ◽  
Dressing Percentage

AbstractA total of 608 Ross 308 broiler chickens of both sexes were studied to determine the effect of Lactococcus lactis 847 bacteria compared to probiotic bacteria Lactobacillus delbruecki 838 and Lactobacillus plantarum 837 on body weight, feed consumption and conversion, mortality, dressing percentage, postmortem carcass traits, composition of breast muscle tissue, and blood plasma traits. Feeding diets with bacteria to chickens did not increase body weight at 42 days of age or improve feed conversion compared to control chickens. It significantly reduced chicken mortality compared to the control group, from 3.3% to 1.4% (P<0.01). No significant differences were found in feed consumption and conversion. There were no significant differences in the weight of carcasses and their parts. Lactococcus lactis 847 and Lactobacillus plantarum 837 bacteria significantly increased dressing percentage (P<0.05). Lactococcus lactis 847 significantly increased liver weight (P<0.05). No significant differences were observed in carcass fatness, and in the dry matter, protein and fat content of breast muscles. Feeding diet with Lactobacillus plantarum 837 to chickens significantly decreased plasma triglyceride levels, and feeding diet with Lactobacillus delbruecki 838 and Lactobacillus plantarum 837 significantly decreased the level of high-density cholesterol (P<0.05). In conclusion, Lactococcus lactis 847 bacteria in diet significantly reduce losses due to digestive disorders while having no effect on the quantity and proportion of saleable cuts in the carcass, the composition of breast muscles and basic blood parameters.

scholarly journals Aluminosilicates at different levels in rye litter and feed affect the growth and meat quality of broiler chickens

2021 ◽  
Author(s):  
Mirosław Banaszak ◽  
Jakub Biesek ◽  
Marek Adamski
Keyword(s):  
Body Weight ◽  
Protein Content ◽  
Meat Quality ◽  
Broiler Chickens ◽  
Body Weight Gain ◽  
Management Practice ◽  
Water Holding Capacity ◽  
Group 3 ◽  
Water Holding ◽  
Group 1

AbstractLitter sanitation treatments and feed supplements that stimulate bird growth. The aim of this study was to analyse the effects of zeolite (z) and halloysite (h) in feed and rye straw litter on growth performance, meat quality in chickens. 500 males Ross 308 were allocated to 5 groups (10 replicates). Feed for groups 2–5 was supplemented with halloysite and zeolite (25:75). The content of aluminosilicates in the feed was different depending on the feeding phase: 0.5, 1, 1.5, or 2%. The following doses were used in litter: 2, 0.800 kg/m2 h; 3, 0.400 kg/m2 h and 0.400 kg/m2 z; 4, 0.800 kg/m2 z; 5, 0.200 kg/m2 h, and 0.600 kg/m2 z. Growth, and meat quality were analysed. Body weight and body weight gain were higher in groups 2–5 than in group 1, while feed intake was lower in groups 1 and 2 (p < 0.05). Body weight, the weight of carcass, and most of its elements were higher in the experimental groups (p < 0.05). Breast muscles from group 1 were characterised by better water-holding capacity and higher protein content, while those from 4 had higher content of collagen and water (p < 0.05). Breast muscles from group 3 were characterized by lower yellowness than in 2 (p < 0.05). Leg muscles from group 1 were characterized by lower redness than in 4 (p < 0.05). Water-holding capacity was better in group 3 and protein content was higher in 2 (p < 0.05). The content of fat in leg muscle was lower in all experimental groups compared to control (p < 0.05). This indicates the suitability of aluminosilicates in poultry management practice, with better growth and meat quality.

scholarly journals The effect of raw soybean in the final mixtures for broilers on the conformation measures and share of major carcass parts

2016 ◽  
Vol 32 (1) ◽  
pp. 37-44
Author(s):  
Veselin Petricevic ◽  
Milos Lukic ◽  
Zdenka Skrbic ◽  
Snezana Bogosavljevic-Boskovic ◽  
Vladimir Doskovic ◽  
...  
Keyword(s):  
Random Sample ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Absolute Value ◽  
Utilization Of Protein ◽  
Carcass Conformation ◽  
The Absolute ◽  
Sample Method ◽  
Different Levels

The experiment of the supstitution of soybean meal with raw soybean in the final diet was carried out on Hubbard F15 chickens at the age of 35- 42 days. The effect of different levels and varieties of raw soybeans in diets on carcass conformation and share of major carcass parts was determined in a twofactorial experiment 2 x 5 (2 soybean varieties x 5 levels of raw grains in the mixture), ie a total of 10 dietery treatments. At the end of the trial, by a random sample method, 12 chickens (6 males and 6 females) from each group were sacrificed and examined. The results showed that the index of drumstick girth and share of drumstick were under significant (p<0.05) influence of the soybean varieties. The level of raw soybeans in diets had significant effect (p <0.05) on the index of drumstick girth and on the absolute value of the breast depth and breast angle. Shares of breast and thighs of broiler chickens of both sexes were not significantly influenced by the studied factors. It was concluded that the share of raw soybean of 10, 15 and 20% in the final mixtures for broilers hinders the utilization of protein in the ration, resulting in poorer quality of chicken carcasses.

scholarly journals PSXIV-37 Assessment of milk yield, milk composition and urea nitrogen in milk and plasma in lactating buffaloes fed diets with increasing levels of corn plus urea

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 433-434
Author(s):  
Valdi Lima Júnior ◽  
Tobias Tobit De Barros Melo ◽  
Viviany Lúcia Fernandes Dos Santos ◽  
Leilson R Bezerra ◽  
Marcelo Andrade Ferreira ◽  
...  
Keyword(s):  
Body Weight ◽  
Orthogonal Polynomials ◽  
Protein Content ◽  
Milk Production ◽  
Soybean Meal ◽  
Latin Square ◽  
Milk Composition ◽  
Lactating Buffaloes ◽  
Quadratic Effects ◽  
References Values

Abstract Nowadays, the great challenge in the milk activity is to replace the high cost ingredients without affect the performance and milk composition. So, the objective of this study was to evaluate the effects of replacement of soybean meal by corn plus urea on milk production, milk composition, nitrogen in milk (UNM) and plasma (UNP) concentrations of lactation buffaloes. Twelve Murrah lactating buffaloes, all multiparous (100 days in lactation; average milk production of 10 kg per day), with initial mean body weight of 650 ± 45 kg were used used in a triple Latin square 4 x 4 experiment. Each period included 13 d for adaptation and 5 for milk collect. The samples of plasma were obtained only in the last day of collect, four hours after feed. The experimental diets (12% CP, DM basis) consisted of increasing levels (0, 33, 66 and 100%) of soybean meal replacement by corn plus urea and the forage: concentrate ratio was 60:40. Orthogonal polynomials for diet responses were determined by linear and quadratic effects (P &lt; 0.05). The increasing levels of corn plus urea did not change (P &gt; 0.05) the milk production (averaging 6.4±0.33 kg/d), fat content (averaging 7.4±0.31%) and protein content averaging (3.8±0.07%) in milk. The UNM (15.29, 15.44, 14.80 and 16.02 mg dL-1 for levels 0, 33, 66 and 100% respectively) and UNP values (18.37, 17.20, 18.79 and 18.16 mg dL-1, for levels 0, 33, 66 and 100% respectively) also did not change with experimental diets and are according with references values for buffaloes. The use of corn plus urea is an alternative for lactating buffaloes’ diets and can be replacing soybean meal at levels up to 100%.

scholarly journals Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0254462
Author(s):  
Bahadır Can Güz ◽  
Ingrid C. de Jong ◽  
Carol Souza Da Silva ◽  
Fleur Veldkamp ◽  
Bas Kemp ◽  
...  
Keyword(s):  
Body Weight ◽  
Broiler Chickens ◽  
Volume Fraction ◽  
Bone Development ◽  
Body Weight Gain ◽  
Fast Growing ◽  
Randomized Design ◽  
Lower Body Weight ◽  
Black Soldier Fly Larvae ◽  
Set Up

Pen enrichment for broiler chickens is one of the potential strategies to stimulate locomotion and consequently contribute to better leg health and welfare. This study was designed to evaluate effects of using a plethora of pen enrichments (barrier perches, angular ramps, horizontal platforms, large distance between feed and water and providing live Black Soldier fly larvae in a dustbathing area) on tibia characteristics, locomotion, leg health and home pen behaviour of fast and slower-growing broiler chickens. The experiment was set up as a 2 x 2 factorial arrangement with a total of 840 male broiler chickens in a complete randomized design (7 pens per treatment and 30 chickens per pen) with the following treatments: 1) pen enrichment (enriched pen or non-enriched pen); 2) broiler strain (fast-growing Ross 308 or slower-growing Hubbard JA 757). Home pen behaviour and use of enrichment were observed. At approximately 1400 and 2200 g body weight, two chickens per pen were randomly selected and slaughtered, to investigate tibia morphological, biophysical and mechanical characteristics and leg health. Pen enrichment positively affected tibia biophysical characteristics, e.g., osseous volume (Δ = 1.8 cm3, P = 0.003), total volume (Δ = 1.4 cm3, P = 0.03) and volume fraction (Δ = 0.02%, P = 0.002), in both fast and slower-growing chickens, suggesting that pen enrichment particularly affects ossification and mineralization mechanisms. Accordingly, locomotion and active behaviours were positively influenced by pen enrichment. However, pen enrichment resulted in lower body weight gain in both strains, which might be due to higher activity or lower feed intake as a result of difficulties of crossing the barrier perches. Regarding the strain, slower-growing chickens showed consistently more advanced tibia characteristics and more active behaviour than fast-growing chickens. It can be concluded that pen enrichment may lead to more activity and better bone development in both fast and slower-growing chickens.

Wheat by-products in poultry nutrition. Part II. Nutritive value of wheat screenings, bakery by-products and wheat mill run and their improved utilization by enzyme supplementation

2004 ◽  
Vol 84 (3) ◽  
pp. 429-435 ◽  
Author(s):  
D. Boros ◽  
B. A. Slominski ◽  
W. Guenter ◽  
L. D. Campbell ◽  
O. Jones
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Growth Performance ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Nutritive Value ◽  
Body Weight Gain ◽  
Enzyme Supplementation ◽  
By Products

A series of experiments was conducted to determine the nutritive value of wheat screenings, bakery by-products and wheat mill run used by the feed industry in Canada and to investigate the effect of enzyme supplementation on available energy content, nutrient digestibility and broiler chicken growth performance. Broiler chicken performance (2-wk growth trial) was compared using a wheat/soybean meal-based control diet and diets substituted with wheat by-products (wheat screenings, 200 g kg-1; bakery by-products or mill run, 100 g kg-1). In addition, diets containing one sample of each of the by-products were fed to broiler chickens with enzyme supplementation (Superzyme W®). Chicken performance was not affected by dietary substitution of wheat by-products for wheat as values for control, wheat screenings (three samples), bakery by-products (two samples) and mill run (one sample) were similar for body weight gain (514, 520, 515, 500 g bird-1) and for feed to gain ratio (1.52, 1.52, 1.52, 1.50), respectively. Response to enzyme supplementation was highest for wheat screenings showing a statistically significant (P ≤ 0.05) improvement in body weight gain (523 vs. 548 g bird-1) and feed to gain ratio (1.54 vs. 1.47). To further substantiate the importance of enzyme supplementation, a long-term production trial with broiler chickens was conducted. Five replicate pens of 60 birds per treatment were used in the starter (21 d) and grower (16 d) phases of the experiment consisting of three treatments: positive control (PC) (wheat/soybean meal/fish meal), negative control (NC) (wheat/wheat screenings/barley/soybean/ canola meal) and NC + Enzyme (Superzyme W®). In comparison to PC, the NC diet contained 5% less metabolizable energy, 8–10% less crude protein, amino acids and calcium and 25% less available phosphorus. Body weight gain and feed conversion ratio averaged 2.14, 2.10, 2.17 kg bird-1 and 1.68, 1.76, 1.66 for PC, NC and NC + Enzyme, respectively. A significant (P < 0.05) improvement in broiler chicken performance with enzyme supplementation was further substantiated by the same magnitude of difference in dry matter (71.2, 68.7, 75.1%), starch (92.5, 90.3, 95.6%), non-starch poly saccharides (NSP) (4.8, 15.0, 36.1%), energy (AME) (12.37, 11.83, 12.84 MJ kg-1) and phytate (44.3, 37.5, 69.5%) digestibilities. It is evident from this study that the use of wheat by-products in concert with an effective enzyme supplement in broiler chicken diets will allow for optimum growth performance. Key words: Broilers, by-products, feeding value, enzymes

scholarly journals EFFECT OF FEED WITHDRAWAL AND ADDING DRIED BAKERY YEAST IN THE DIET ON DRESSING PERCENTAGES AND MEAT CHEMICAL COMPOSITION OF BROILERS

2009 ◽  
Vol 33 (2) ◽  
Author(s):  
Shahrazad M. Al-Shadeedi
Keyword(s):  
Body Weight ◽  
Chemical Composition ◽  
Broiler Chickens ◽  
Carcass Weight ◽  
Feed Withdrawal ◽  
Live Body Weight ◽  
Dressing Percentage ◽  
Bakery Yeast

This study has been conducted to study the effect of feed withdrawal (8 hours after slaughter) andadding dried bakery yeast on dressing percentage and meat chemical 45 marketed broiler chickens at 8weeks of age .The birds randomly distributed into three treatments (5 birds ) and each treatment tothree replicates (5 birds per replicate ) which were: un-treated control (T1) , broiler chickens subjectedto feed withdrawal 8 hrs. before slautered (T2) , broiler chickens fed a diet contained 1% of driedbakery yeast three days before subjected to feed withdrawal 8 hrs. before slaughtered (T3) . The dataobtained revealed the following :-Adding dried bakery yeast three days before subjected to feed withdrawal 8 hrs. beforeslaughtered (T3) significantly (p<0.01) decreased live body weight in the same time increased (p<0.01)carcass weight , dressing percentage with or without gibletts and gibletts percentage , also T3significantly (p<0.01) increased protein and decreased lipid and cholesterol of breast and legs meatcompaired with Feed withdrawal (T2) which significantly (p<0.01) predominent compaired with T1 .

scholarly journals Effect of protease and duration of fattening period on dressing percentage of broiler chickens

2016 ◽  
Vol 32 (4) ◽  
pp. 353-360 ◽  
Author(s):  
Vladimir Doskovic ◽  
Snezana Bogosavljevic-Boskovic ◽  
Lidija Peric ◽  
Milos Lukic ◽  
Zdenka Skrbic ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Crude Protein ◽  
Carcass Weight ◽  
Fast Growing ◽  
Protein Levels ◽  
Protease Enzyme ◽  
Body Weights ◽  
Dressing Percentage ◽  
Fattening Period ◽  
Experimental Group

This study evaluates the effect of different crude protein levels in broiler diets supplemented with 0.2% and 0.3% protease enzyme (Ronozyme Pro Act) on dressed carcass weight and dressing percentage during two fattening periods (49 and 63 days). The fast-growing strain Cobb 500 was used. At the end of the fattening trial i.e. at 49 and 63 days, 10 male and 10 female birds were randomly sacrificed from each experimental group to determine body weights and conventionally dressed, ready-to-roast and ready-to-grill carcass weights. The data obtained were used to calculate the dressing percentages of the differently dressed carcasses. Results indicated that carcass weights and dressing percentages were not affected by diet (P>0.05), but also showed that the increase in the length of the fattening period by two weeks (from 7 to 9 weeks) led to increased carcass weights, while dressing percentages decreased (P<0.05).

scholarly journals Application of dried distillers grains with solubles (DDGS) as a replacer of soybean meal in broiler chickens feeding

2012 ◽  
Vol 55 (5) ◽  
pp. 496-505 ◽  
Author(s):  
M. Łukasiewicz ◽  
D. Pietrzak ◽  
J. Niemiec ◽  
J. Mroczek ◽  
M. Michalczuk
Keyword(s):  
Body Weight ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Distillers Grains ◽  
Yeast Cells ◽  
Feed Conversion ◽  
Distillers Grains With Solubles ◽  
Dried Distillers Grains ◽  
Feeding Experiments ◽  
Similar Body

Abstract. Contemporarily, the production of high-grade ethyl alcohol enables obtaining dried distillers decoction that contains post-fermentation residues of cereal grains, solubles as well as yeast cells and their metabolites multiplied in the fermentation process, which makes that product applicable also in poultry feeding. Experiments were conducted on 540 broiler chickens of COBB 500 line. One-day chicks were randomly allocated to 3 nutritional groups: K, D1 and D2, each group consisted of 6 replicates of 30 birds. The factor that differentiated the groups was the content of dried wheat decoction in the starter type feed mixture (5% and 7%). Production results (individual body weight, feed intake and mortality) of the birds were controlled in a 42-day rearing period. On the 42nd day of rearing, 6 male and 6 female chickens from each group were chosen for slaughter that had body weights similar to the average of each group according to gender. The aim of this study was to determine experimentally whether the by-product of ethanol production is suitable for replacing soybean meal in feeding broiler chickens. The application of the wheat decoction had no negative effect on production results of the chickens. The birds fed a mixture with a higher content of dried distillers grains with solubles (DDGS) were characterised by a similar body weight and better feed conversion ratio compared to the control birds. A properly-balanced (fibre, energy, amino acids) nutritional dose of the dried wheat decoction may be used as a good energy-protein component in feed mixtures for broilers. It is a rational means of DDGS management which is, simultaneously, a cheaper substitute for soybean meal.

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