Nutritional and physiological studies on friesian calves fed protected fat and protein diets: 6. histological and histometric characteristics of the rumen
Abstract: A total of 18 Friesian calves having one month of age was used in 3 dietary treatment groups to study the effect of feeding protected protein or protected fat diets, from 1 up to 8 months of age, on histological characteristics of the rumen of Friesian calves. The 1st group (control) was fed untreated concentrate feed mixture (CFM), the 2nd was fed CFM, 5% of it was replaced by protected fat (PF) and the 3rd was fed CFM treated with 1% formaldehyde on the basis of its total CP (PP). All groups were fed plus berseem hay beside the CFM. Thickness of all ruminal wall tunicae, mucosal laminae and stratum (st.) corneum was estimated. Also, density and dimensions of ruminal papillae were measured to calculate papillary surface area. Results indicated that tunica mucosa was thicker (P<0.05) in PP than in PF and control groups. Thickness of lamina epithelialis mucosa (LEM) did not differ significantly among treatment groups. However, it was thicker (P<0.05) in PF than in PP group (0.30 vs. 0.27 mm). As overall mean, st. corneum tended to be thicker in control (44.3 μm) than in PF (42.9 μm) and PP (43.2 μm) group. Lamina propria was thicker (P<0.05) in PP than in PF and control groups (1.20 vs. 0.96 and 1.02 mm). Submucosa was thicker (P<0.05) in PF and PP groups than in control group. Total thickness of tunica musculosa was higher (P<0.05) in PF and PP than in control group. Generally, thickness of all previous traits varied significantly between different ruminal sacs as affected significantly by dietary treatments. Ventral ruminal sac showed significantly the highest thickness in calves of all groups. Papillary length was affected (P<0.05) by dietary treatment, but each of PF or PP group did not differ significantly from that of the control one. Papillary length in was shorter (P<0.05) in PF than in PP group. Treatment group did not affect papillary width. Density of papillae was lower (P<0.05) in PF and PP groups than in control one. Surface area of each papilla was lower (P<0.05) in PF than in PP and control groups, which did not differ significantly. Papillary surface area per cm2 was lower (P<0.05) in PF group; however, PP group showed insignificantly lower values compared with the control. Inter-papillary surface area per cm showed negative relationship with papillary density and was significantly affected by dietary treatments, ruminal sac and their interaction. Total surface area per cm2 of different ruminal sacs mainly affected by surface area of papillae within each cm2. So, total surface area/cm2 showed the same trend of surface area of papillae/cm2 as affected by dietary treatment and ruminal sacs. On the basis on the foregoing results, it could be conclude from the nutritional point of view that feeding calves on the tested diets resulted had beneficial effects on histological and histometric characteristics of rumen of Friesian calves during suckling period and early post-weaning ages.
Keywords: Histological, rumen, calves, protected protein, protected fat,
Publication year 2006
Pages 7561-7578
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City المنصورة
serial title Journal Agricultural Science Mansoura University
ISSN 1110-0346
Author(s) from ARC
External authors (outside ARC)
    عبد الخالق السيد عبد الخالق جامعة المنصورة
    عبد الحميد محمد عبد الحميد جامعة المنصورة
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Calves. Proteins. Rumen.
Proposed Agrovoc protected fat;Histological;protected protein;
Publication Type Journal
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