Biological performance and gastrointestinal development of broiler chicks fed diets varying in energy : protein ratio

Swatson, H. K.; Gous, R. M.; Iji, Paul

doi:10.4314/sajas.v30i4.3944

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Danicke et al (2000) suggested that both synthesis and secretion of exocrine pancreas enzymes are upregulated by feed intake and nutrient presence and density in the intestine. Consistent with the present findings, Swatson et al (2000) indicated that increase in dietary CP level increased relative pancreas weight, in part due to the induction of high amount of enzymes and protein secretion.…”

Section: Effects Of Different Levels Of Dietary Crude Protein and Thrsupporting

confidence: 92%

Effects of different levels of dietary crude protein and threonine on performance, humoral immune responses and intestinal morphology of broiler chicks

Abbasi

Mahdavi

Samie

et al. 2014

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

The present study aimed at investigating the effects of different dietary crude protein (CP) and threonine (Thr) levels on the performance, immune responses and jejunal morphology of broiler chicks. A total of 432 broiler chicks were randomly assigned to a 3×3 factorial arrangement of treatments including three different CP dietary levels (90, 95, and 100% of Ross 308 recommendations) and Thr (100, 110, and 120% of Ross specifications) dietary levels. Performance parameters were recorded for the starter (1-12 days), grower (13-24 days) and finisher (25-42 days) periods. Birds were subjected to different antigen inoculations to evaluate antibody responses. At day 42 of age, two randomly-selected birds per replicate were slaughtered to measure carcass traits. Although Thr dietary supplementation had no marked effect on Newcastle antibody titers, particularly the supplementation of Thr up to 110% of Ross specifications improved (p<0.05) antibody titers against sheep red blood cells during both primary and secondary responses. Reduction of dietary CP level resulted in significant decrease in villus height (p<0.05) and crypt depth (p<0.01) in jejunal epithelial cells, but the supplementation of low-CP diets with Thr up to 110 and 120% of the recommended values allowed overcoming these changes. Except for the starter period, reducing dietary CP level to 90% of Ross recommendations had no harmful effects on performance parameters; however, the best values were obtained with diets containing 110% Thr. The present results indicate that it is possible to reduce dietary CP level up to 10% after the starter period without any detrimental impact on growth performance, and dietary Thr supplementation up to 110% of Ross values may compensate for low CP-induced growth delay in broiler chicks.

show abstract

Section: Effects Of Different Levels Of Dietary Crude Protein and Thrsupporting

confidence: 92%

Effects of different levels of dietary crude protein and threonine on performance, humoral immune responses and intestinal morphology of broiler chicks

Abbasi

Mahdavi

Samie

et al. 2014

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

show abstract

“…These results agree with the findings of Osman et al (1996), who reported that the relative weight of digestive tract and cecum length were increased when Pekin ducklings were fed on a non-conventional diet, which had higher level of crude fiber. Also, Swatson et al (2000) found that increasing the level of protein in the diet increased significantly the empty weight of ileum and ceca. Moreover, duodenal weight varied significantly with the change in dietary protein level.…”

Section: -2-effect Of Feed Additives:-mentioning

confidence: 92%

Evaluation of the Growth Performance of Broiler Chicks Fed on Plant Diets Supplement Ed With Some Feed Additives.

Osman

Soliman

Hassanein

et al. 2007

Journal of Animal and Poultry Production

View full text Add to dashboard Cite

A total number of 360, unsexed one-day old Hubbard broiler chicks were randomly distributed into 12 groups with 3 replicates of 10 chicks each and used in a factorial experiment [3 diets x 4 feed additives (probiotics)]. Two control diets (one starter and another grower) were formulated from plant-origin ingredients to meet the major nutrient requirements of broiler chicks. Other two starter and two grower diets were formulated to have 2% less CP but adequate ME (low-CP diets) or less ME by 200 kcal/kg but adequate CP (low-ME diets).Both starter and grower diets were supplemented with or without 0.1% Bio-Min (as a microbial growth promoter) or 0.03% Ronozyme (as enzymatic growth promoter) or 0.1% Super-Bio-Action (as a microbial and enzymatic growth promoter). Birds received the experimental diets up to 6 weeks of age. The criteria of response were the performance of chicks for weight gain and feed conversion, some carcass and digestive tract measurements, and economic efficiency. The results revealed the following -Broiler chicks fed on the low-ME diets achieved heaviest body weight at 6 weeks of age and body weight gain during the period from 3 to 6 and 0 -6 weeks of age. -Addition of probiotics into broiler chick diets improved (P≤0.05) the chicks, body weight gain, during starting period (0-3 weeks of age) and during the whole experimental period (0 to 6 weeks of age). -Broiler chicks fed on the low ME diet consumed the greatest (P≤0.05) amount of feed during the growing period (3 to 6 weeks of age) and entire experimental period (0 to 6 weeks of age). -Birds fed on the low-ME or low-CP diets exhibited a significantly (P≤0.05) inferior feed conversion during the starting period compared to their control counterparts, but this significant difference was disappeared during the growing and entire experimental period. -Probiotics supplementation improved (P≤0.05) the feed conversion during starting, growing and entire experimental periods. -Neither diet nor probiotics had significant effect on viability of chicks during the entire experimental period. -Broiler chicks fed on the low-ME diets achieved a lower (P≤0.05) cost of feed/kg gain compared to those fed on the low-CP diets. However, selling price/bird and economic efficiency were the highest (P≤ 0.05) by feeding the low-ME diets. Economic efficiency was also improved by feed supplements used. -Dietary treatments had insignificant effect on dressing % , while broiler chicks fed on the low-CP diets had the highest (P≤0.05) abdominal fat % at marketing age. -Probiotics supplementation improved (P<0.01) carcass weight, while dressing, abdominal fat and giblets percentages were not significantly influenced. -Broiler chicks fed on the low-ME diets recorded the lowest (P≤0.05) relative length of small intestine, cecum, large intestine and relative weight. -Probiotics had negligible effect on some digestive tract measurements.

show abstract

Effect of Feeding Programs on Broilers Cobb and Arbor Acres plus Performance

Saki¹,

Momeni²,

Tabatabaei³

et al. 2010

International J. of Poultry Science

View full text Add to dashboard Cite

Biological performance and gastrointestinal development of broiler chicks fed diets varying in energy : protein ratio

Cited by 3 publications

References 0 publications

Effects of different levels of dietary crude protein and threonine on performance, humoral immune responses and intestinal morphology of broiler chicks

Effects of different levels of dietary crude protein and threonine on performance, humoral immune responses and intestinal morphology of broiler chicks

Evaluation of the Growth Performance of Broiler Chicks Fed on Plant Diets Supplement Ed With Some Feed Additives.

Effect of Feeding Programs on Broilers Cobb and Arbor Acres plus Performance

Contact Info

Product

Resources

About