1455 Effect of particle size of a mash concentrate on behavior, rumen fermentation, and macroscopic and microscopic lesions of the digestive tract in Holstein bulls fed a high-concentrate diet

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 706-706
Author(s):  
M. Devant ◽  
B. Quintana ◽  
A. Sole ◽  
A. Bach
Keyword(s):  
Particle Size ◽  
Digestive Tract ◽  
Rumen Fermentation ◽  
Effect Of Particle Size ◽  
Holstein Bulls

scholarly journals Effect of mechanical processing of ce­reals on rumen starch degradability

2010 ◽  
Vol 58 (2) ◽  
pp. 139-146
Author(s):  
Jana Kopčeková ◽  
Zuzana Čerešňáková ◽  
Pavel Fľak ◽  
Zuzana Mlyneková
Keyword(s):  
Particle Size ◽  
Digestive Tract ◽  
Mechanical Processing ◽  
Optimal Degree ◽  
Cereal Grain ◽  
Ruminal Degradation ◽  
Effect Of Particle Size ◽  
In Sacco

Although starch in cereal grain is almost completely digested in the whole digestive tract, the rate and extent of ruminal degradation and fermentation vary widely with grain source and cereal processing. The objective of this study was to determine the effect of particle size (≤ 1.4, 1.5–2.5, 2.6–3.0 and > 3.0 mm) of mechanically processed wheat, barley and maize on ruminal degradation of starch. Standardized in sacco method was used to determine the degradation of starch in mechanically processed grains with incubation times of 0, 3, 6, 9, 16, 24, and 48 hours for maize, respectivelly. Significant differences of starch effective degradability (EDg) were determined among experimental feeds as well as dependence on particle size of feeds. Among cereals, wheat had the highest effective starch de­gra­da­bi­li­ty (83.0–95.2%), the lowest was found for maize (52.1–76.1%). Effective degradability of starch was the highest for the smallest particles (≤ 1.4 mm), 95.2 for wheat, 91.2 for barley and 76.1% for maize. The effective degradability of starch was decreased with enlarging of particle size of used grains. These results indicate that optimal degree is coarsely grinding, because larger particles increased passage of starch to the duodenum.

scholarly journals Effect of particle size of a mash concentrate on behavior, digestibility, and macroscopic and microscopic integrity of the digestive tract in Holstein bulls fed intensively1

2018 ◽  
Vol 3 (1) ◽  
pp. 473-484 ◽  
Author(s):  
Maria Devant ◽  
Anna Solé ◽  
Bruna Quintana ◽  
Armando Pérez ◽  
Josep Ribó ◽  
...  
Keyword(s):  
Particle Size ◽  
Digestive Tract ◽  
Feed Efficiency ◽  
Geometric Mean ◽  
Potential Effect ◽  
Nutrient Digestibility ◽  
Hammer Mill ◽  
Tissue Samples ◽  
Holstein Bulls ◽  
Size Heterogeneity

Abstract Twenty-four individually housed Holstein bulls (456 ± 6.9 kg of body weight and 292 ± 1.4 d of age) were enrolled in a complete randomized experiment involving four dietary treatments to evaluate the potential effect of mash particle size of diets in finishing beef diets on behavior, digestibility, and macro- and microscopic changes of the digestive tract. The four treatments were all ingredients sieved at 2 mm (HM2), all ingredients sieved at 3 mm (HM3), all ingredients, but corn, sieved at 2 mm and corn at 10 mm (HM210), and all ingredients, but corn, sieved a 3 mm and corn at 10 mm (HM310). For the HM210 and HM310 mashes, corn ground at 10 mm was mixed with the remaining concentrate ingredients ground at 2 or 3 mm, respectively. Concentrate (36% corn, 19% barley, 15% corn gluten feed, 8.4% wheat; 14% crude protein, 3.28 Mcal of ME/kg) consumption was recorded daily and straw consumption weekly. To register behavior, animals were filmed for 24 h on a weekly basis. At day 49 of study nutrient digestibility was estimated. Bulls were slaughtered after 56 d of exposure to treatments. Digestive tract and hepatic lesions were recorded, and tissue samples from the digestive tract collected. Geometric mean particle size was 0.61 ± 0.041, 0.76 ± 0.041, 0.62 ± 0.041, 0.73 ± 0.041 mm, and percentage of particles between 0.5 and 1 mm were 68 ± 2.9, 46 ± 1.7, 46 ± 5.0, and 39 ± 3.3 g/100 g for HM2, HM210, HM3, and HM310, respectively. Performance, total tract digestibility, or digestive tract integrity did not differ when ingredients were ground at 2 or 3 mm. Grinding corn with a hammer mill sieve size of 10 mm reduced feed efficiency and decreased total tract apparent dry matter, and organic matter digestibility compared with treatments from which all ingredients were ground at 2 or 3 mm. Straw intake was greatest and starch digestibility was least in the HM210 treatment. Last, only minor differences among treatments in rumen wall color, rumen papillae fusion, and histological conformation were observed. In summary, to improve feed efficiency, grinding corn at 10 mm is not recommended. In the present study, grinding procedure did not have a great effect on behavior and/or digestive tract health; however, under commercial conditions (group housing), grinding procedures that cause small mean particle sizes or particle size heterogeneity may increase the risk to suffer digestive tract lesions.

Effect of particle size of pea (Pisum sativumL) flours on the digestion of their proteins in the digestive tract of broilers

1997 ◽  
Vol 75 (2) ◽  
pp. 217-226 ◽  
Author(s):  
Irène Crévieu ◽  
Bernard Carré ◽  
Anne-Marie Chagneau ◽  
Jacques Guéguen ◽  
Jean-Pierre Melcion
Keyword(s):  
Particle Size ◽  
Digestive Tract ◽  
Effect Of Particle Size

Effect of particle size on erosion measurements and predictions in annular flow for an elbow

Wear ◽  
2020 ◽  
pp. 203579
Author(s):  
G. Haider ◽  
M. Othayq ◽  
J. Zhang ◽  
R.E. Vieira ◽  
S.A. Shirazi
Keyword(s):  
Particle Size ◽  
Annular Flow ◽  
Effect Of Particle Size

The Effect of Particle Size and Phospholipid on Growth and Fat Utilization of the Baby Pig

1951 ◽  
Vol 10 (4) ◽  
pp. 867-874 ◽  
Author(s):  
B. E. Sheffy ◽  
Carlos Acevedo Gallegos ◽  
R. H. Grummer ◽  
P. H. Phillips ◽  
G. Bohstedt
Keyword(s):  
Particle Size ◽  
Fat Utilization ◽  
Effect Of Particle Size
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