scholarly journals Effects of dietary coarsely ground corn and litter type on broiler live performance, litter characteristics, gastrointestinal tract development, apparent ileal digestibility of energy and nitrogen, and intestinal morphology

2015 ◽  
Vol 94 (3) ◽  
pp. 353-361 ◽  
Author(s):  
Y. Xu ◽  
C.R. Stark ◽  
P.R. Ferket ◽  
C.M. Williams ◽  
S. Auttawong ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Intestinal Morphology ◽  
Litter Type ◽  
Live Performance ◽  
Ileal Digestibility ◽  
Ground Corn

scholarly journals Evaluation of litter type and dietary coarse ground corn inclusion on broiler live performance, gastrointestinal tract development, and litter characteristics

2015 ◽  
Vol 94 (3) ◽  
pp. 362-370 ◽  
Author(s):  
Y. Xu ◽  
C.R. Stark ◽  
P.R. Ferket ◽  
C.M. Williams ◽  
B. Nusairat ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Litter Type ◽  
Live Performance ◽  
Ground Corn

scholarly journals Effects of antibiotic growth promoter and dietary protease on growth performance, apparent ileal digestibility, intestinal morphology, meat quality, and intestinal gene expression in broiler chickens: a comparison

2020 ◽  
Vol 98 (9) ◽  
Author(s):  
Peng Lu ◽  
Janghan Choi ◽  
Chongwu Yang ◽  
Marion Mogire ◽  
Shangxi Liu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Meat Quality ◽  
Amino Acid Transporter ◽  
Intestinal Morphology ◽  
Mrna Abundance ◽  
Growth Promoter ◽  
Ctrl Group ◽  
Ileal Digestibility ◽  
Acid Transporter

Abstract This study aimed to evaluate the effects of supplementing broiler diets with a dietary protease on growth performance, digestive function, intestinal morphology, and meat quality as compared with feeding diets with or without an antibiotic growth promoter (AGP). A total of 240 1-day-old male chicks (Cobb 500, 48.3 ± 3.3 g) were distributed to three treatments with eight replicates (10 birds per replicate). Three treatments were: 1) corn–soybean meal basal diets (CTRL), 2) basal diets with 0.003% avilamycin (AB), and 3) basal diets with 0.0125% protease (PRT). The diets were provided as mash form, and birds were fed ad libitum during the whole experimental period. On day 45, birds were euthanized, and tissue and digesta samples were collected. On day 46, the remaining birds were processed in a commercial slaughterhouse, and breast muscle samples were collected. Despite a trend for a decreased feed conversion ratio (FCR) in the AB group during the whole phase (P = 0.071), no significant differences in growth performance parameters and relative weights of organs were observed (P > 0.05) among the groups. The AB and PRT groups showed significantly greater apparent ileal digestibility of amino acids (AA) compared with the CTRL group (P < 0.05). The PRT group significantly improved the morphology of duodenum and jejunum (P < 0.05). No differences were detected for meat quality, white striping, and woody breast among the groups (P > 0.05). For the gene expressions, the AB group showed a greater level of B0-system neutral amino acid co-transporter 1 and excitatory amino acid transporter 1 mRNA abundance compared with PRT group, while a significantly lesser level of cationic amino acid transporter 1 mRNA abundance was observed in the AB group compared with CTRL group (P < 0.05). The PRT group had a lesser level of peptide transporter 1 mRNA abundance in the jejunum than the CTRL group (P < 0.05). The highest mRNA abundances of zonula occludens-1 and cadherin 1 were observed in the CTRL group (P < 0.05). In conclusion, supplementation of avilamycin tended to reduce FCR and significantly improved AA utilization, and supplementation of dietary protease significantly enhanced intestinal morphology and AA utilization in broilers. In that respect, exogenous protease use appears to be an interesting tool to be considered in AGP reduction strategies.

scholarly journals Effect of feed structure on nutrient digestibility, growth performance, and gastrointestinal tract of pigs – A Review

2014 ◽  
Vol 14 (4) ◽  
pp. 757-768 ◽  
Author(s):  
Marianna Flis ◽  
Wiesław Sobotka ◽  
Cezary Purwin
Keyword(s):  
Particle Size ◽  
Gastrointestinal Tract ◽  
Short Chain Fatty Acids ◽  
Nutrient Digestibility ◽  
Feed Ratio ◽  
Published Data ◽  
Microbial Infection ◽  
Ileal Digestibility ◽  
Stomach Ph ◽  
Roller Milling

AbstractThe objective of this manuscript has been to analyse published data on the effect of feed structure (coarse/fine, meal/pelleted) on some parameters of the nutritional value of feed, performance of pigs and their gastrointestinal tract. The papers reporting mean geometric particle size or distribution of particles on sieves for the feeds used, were mainly considered. The literature data have indicated that finely ground feeds have a higher ileal digestibility of crude protein and amino acids and higher faecal digestibility of nutrients. They also contain more digestible and metabolisable energy than coarser ground feeds. Reduction of feed particle size has a stronger impact on the gain/feed ratio increase than on the daily gain of pigs. However, coarser feed structure and roller milling are efficient in maintaining the health of stomach. Lactic bacteria, stomach pH, short chain fatty acids in the gastrointestinal tract (GIT), as well as the volume and character of mucins positively responded to coarser and to non-pelleted feeds. Less intensively ground feeds, especially before pelleting, are also better at protecting the GIT of pigs against microbial infection by Salmonella enterica. Based on the references, some recommendations of grinding intensity have also been included.

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