Czech Journal of Animal Science, 2005 (vol. 50), issue 2
Comparison of organic matter digestibility determined by in vivo and in vitro methods
J. Forejtová, F. Lád, J. Třináctý, M. Richter, L. Gruber, P. Doležal, P. Homolka, L. Pavelek
Czech J. Anim. Sci., 2005, 50(2):47-53 | DOI: 10.17221/3994-CJAS 
A total of 36 samples of feed - 19 samples of hays and 17 samples of silages were used for estimation of in vivo and in vitro digestibility. The organic matter digestibility (OMD) was estimated by in vivo and two in vitro techniques (method of Tilley and Terry and two-stage pepsin-cellulase method (Pepcel)). The regression equations were calculated from the results obtained in the experiment. Tilley and Terry method provided consistent results of OMD estimation for both the groups of roughages: in vivo OMD = 14.7 + 0.782 × [Tilley and Terry] (n = 18; R2 = 0.76); in vivo...
Total phenolics and phenolic acids content in low (Chrysopogon gryllus) and mediocre quality (Festuca vallesiaca) forage grasses of Deliblato Sands meadow-pasture communities in Serbia
L. Djurdjević, M. Mitrović, P. Pavlović, S. Perišić, M. Mačukanović-Jocić
Czech J. Anim. Sci., 2005, 50(2):54-59 | DOI: 10.17221/3995-CJAS
Chrysopogon gryllus and Festuca vallesiaca are components of a number of meadow-pasture communities in Serbia. We performed the analyses of phenolics that influence quality and digestibility of grasses to a great extent. Total phenolics were measured spectrophotometrically and phenolic acids by HPLC analysis. The aboveground parts of C. gryllus contained 10.6 mg/g whereas F. vallesiaca of 21.6 mg/g total phenolics. Bound phenolics dominated over free ones in both species. The content of both free and bound p-coumaric, ferulic, p-hydroxybenzoic and syringic acid was higher in C....
Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation
A. Kamalak, O. Canbolat, Y. Gurbuz, O. Ozay
Czech J. Anim. Sci., 2005, 50(2):60-67 | DOI: 10.17221/3996-CJAS
Dry matter (DM) degradation of wheat straw (WS), barley straw (BS), lucerne hay (LH) and maize silage (MS) was determined using two different techniques: (i) in vitro gas production and (ii) nylon bag degradability technique. In vitro gas production and in situ DM disappearance were measured after 3, 6, 12, 24, 48, 72 and 96 hours of incubation. In situ and in vitro DM degradation kinetics was described using the equation y = a + b (1 - ect). In all incubations there were significant (P < 0.001) correlations between gas production...
Effects of supplemental phytase on the mineral content in tibia of broilers fed different cereal based diets
J. Pintar, M. Bujan, B. Homen, K. Gazić, M. Sikirić, T. Černy
Czech J. Anim. Sci., 2005, 50(2):68-73 | DOI: 10.17221/3997-CJAS
A 21-day experiment with day-old broilers was conducted in order to assess the effect of phytase supplementation to cereal-soybean meal based diets on the mineral content in tibia (Ca, P, Fe, Mg, Cd, Zn). Diets were formulated to contain 4 different cereals (maize, wheat, triticale and barley), 2 levels of dietary calcium (0.6 and 1.0%) and 3 levels of supplemental phytase (0, 500 and 1 000 PU/kg). Supplemental phytase increased the mineral levels in tibia. A statistically significant increase was observed for Fe (P < 0.024) and Mg (P < 0.024), but not for Ca, P, Cd and Zn contents in tibia. In the case of Fe and Mg contents...
Influence of lucerne and meadow hay quality on the digestibility of nutrients in the roe deer
A. Sommer, M. Vodňanský, P. Petrikovič, R. Požgaj
Czech J. Anim. Sci., 2005, 50(2):74-80 | DOI: 10.17221/3998-CJAS
It was confirmed in metabolic experiments with 4 individuals of roe deer (2 males and 2 females with the live weight of 20.8 and 17.9 kg, respectively) that due to the animals' selective choice of a part of feeds there was no significant difference in the intake of lucerne hay of different quality and high-quality meadow hay (515.86 ± 66.97 and 597.82 ± 94.87 g, respectively). However, different quality of lucerne hay influenced the animals' intake of crude protein and crude fibre. When the animals were fed meadow hay, they took in significantly less crude protein and fibre and significantly more nitrogen-free extract, fat and ash. Digestibility...
Effect of selected fattening performance and carcass value traits on textural properties of beef
J. Sochor, J. Simeonovová, J. Šubrt, J. Buchar
Czech J. Anim. Sci., 2005, 50(2):81-88 | DOI: 10.17221/3999-CJAS
Fifty-one crossbreed young bulls, progenies of Charolais (CH), Czech Pied (CP), Simmental (SI) and Blonde d'Aquitaine (BA) beef cattle bred at the paternal position crossed by Czech Pied at the maternal position, were reared in a typical production system and slaughtered at an average age of 578 days and live weight of 656 kg. The animals were evaluated for fattening performance and carcass quality traits (live weight at slaughter, age at slaughter, total weight gain, carcass weight, dressing percentage, net daily gain) and meat quality characteristics (dry matter, proteins, fat, ash, pH48, water holding capacity, remission, collagen, area...