White lupin bran and its effects on the growth performance, carcass characteristics and digestibility of nutrients in fattening rabbits

[EN] The purpose of the present study was to evaluate the effects of including white lupin bran (WLB) in a fattening rabbit diet on growth, carcass traits and nutrient digestibility. The C diet (control) based on alfalfa meal, whereas the WLB 5 and WLB 15 diets were based on white lupin bran (crude protein 152 g/kg, neutral detergent fibre 524 g/kg as-fed basis). The WLB 5 diet contained 50 g of white lupin bran/kg instead of 50 g of alfalfa meal/kg, whereas the WLB 15 diet contained 150 g of white lupin bran/kg, 5 g of soybean meal/kg and 10 g of sugar beet pulp/kg instead of 165 g of alfalfa meal/kg. The diets had similar digestible protein/digestible energy ratios. A total of 150 Hyplus rabbits between the ages of 30 to 73 d were randomly allocated into one of 3 groups and fed one of the 3 experimental diets. Additionally, another 30 Hyplus rabbits (10 per dietary treatment) at the age of 30 d were selected to determine coefficients of total tract apparent digestibility (CTTAD) of diets between 63 and 67 d of age. The dietary treatments did not affect the final live weight of rabbits (mean=2969 g). There was a higher feed intake (+30 g/d; P<0.001) in both groups of rabbits fed the WLB 5 and WLB 15 diets compared to rabbits fed the C diet, which led to impaired feed conversion ratios (P<0.001). Sanitary risk index was not affected by dietary treatment. The rabbits fed the WLB 15 diet exhibited a higher drip loss percentage (+0.65%; P<0.001) than the rabbits fed the other diets, as well as a lower dressing-out percentage (by 1.6%; P=0.024). The CTTAD of the lignocellulose fraction (acid detergent fibre) was significantly higher in rabbits fed the WLB 5 and WLB 15 diets than in those fed the C diet. White lupin bran may be used as a dietary fibrous by-product without significant impairment of the nutritive value of the diet. This lupin by-product can be included in diets for fattening rabbits up to 15% as a partial replacement of alfalfa meal.Uhlířová, L.; Volek, Z.; Marounek, M. (2018). White lupin bran and its effects on the growth performance, carcass characteristics and digestibility of nutrients in fattening rabbits. World Rabbit Science. 26(1):1-6. doi:10.4995/wrs.2018.8781SWORD1626

Effect of a diet containing white lupin hulls (Lupinus albus cv. Amiga) on total tract apparent digestibility of nutrients and growth performance of rabbits

[EN] The objective of this study was to evaluate the effect of the inclusion of white lupin hulls in a rabbit diet on the digestibility of nutrients and growth performance. Two experimental diets were formulated: C [control: 168 g crude protein (CP) and 409 g neutral detergent fibre (NDF)/kg) and WLH diet (substituting 100 g wheat bran by 50 g barley and 50 g white lupin hulls/kg: 162 g CP and 391 g NDF/kg). A total of 24 weaned rabbits were individually housed, randomly allocated to 2 groups and fed one of the 2 experimental diets from 31 to 73 d of age. The coefficients of total tract apparent digestibility (CTTAD) of dry matter, gross energy, CP and NDF of the experimental diets were determined in rabbits between 45 and 49 d of age. The diets had a similar digestible protein/digestible energy ratio (11.2 and 10.7 g/MJ for the C and WLH diet, respectively). Rabbits showed normal figures for growth rate (on av. 52.4 g/d), feed intake (on av. 155.1 g/d) and feed conversion ratio (on av. 2.97). There were no significant differences between treatments in the CTTAD of dry matter (0.656 and 0.666 for the C and WLH diet, respectively), gross energy (0.667 and 0.677 for the C and WLH diet, respectively), CP (0.770 and 0.777 for the C and WLH diet, respectively) or NDF (0.451 and 0.428 for the C and WLH diet, respectively). It may be concluded that white lupin hulls can serve as a suitable by-product for rabbit feed and do not significantly reduce the nutritive value of the diet.Financial support for this study was provided by the institutional research project MZE 0002701404.Volek, Z.; Volková, L.; Marounek, M. (2013). Effect of a diet containing white lupin hulls (Lupinus albus cv. Amiga) on total tract apparent digestibility of nutrients and growth performance of rabbits. World Rabbit Science. 21(1):17-21. https://doi.org/10.4995/wrs.2013.1191SWORD172121

The effect of housing conditions on Biceps femoris muscle fibre properties, fatty acid composition, performance and carcass traits of slow-growing rabbits

The aim of the present work was to evaluate the effect of stocking density on the biceps femoris (BF) muscle fibre properties, meat quality, the growth performance and carcass traits of Czech White rabbits.  A total of 20 rabbits (40 days old, 10 rabbits per treatment, sex ratio 1/1) were reared in cages at different stocking densities (10 rabbits/m2 or 4 rabbits/m2) for 49 days. Stocking density had no significant effect on the growth performance. There were no significant differences between groups with regard to hot carcass weight (HCW) or dressing-out percentage. The proportions of both perirenal (9.5 vs. 15.9 g/kg HCW; P=0.010) and total dissectible fat (14.9 vs. 25.1 g/kg HCW; P=0.001) were lower in rabbits reared at the lower stocking density. No significant differences in ultimate pH values, meat colour or proximate composition were observed. The hind leg meat of rabbits reared at the lower stocking density contained significantly less lauric (4.6 vs. 6.7 mg/100 g of muscle; P=0.008) and myristic acid (52.2 vs. 64.4 mg/100 g of muscle; P=0.033). Significantly higher percentages of βR fibres (16.3 vs. 6.5 %, P=0.001) and αR fibres (24.5 vs. 14.2 %; P=0.001) and a significantly lower percentage of αW fibres (59.2 vs. 79.3 %; P=0.001) were also observed in these rabbits. The mean cross-sectional area (1882 vs. 2744 μm2; P=0.001) and diameter (47.9 vs. 58.5 μm; P=0.001) of βR fibres were smaller in rabbits reared at the lower stocking density. Thus, the lower stocking density favourably affected the medium-chain fatty acid profile of meat and fibre characteristics of the rabbits' biceps femoris muscle

Phytase activity and comparison of chemical composition, phytic acid p content of four varieties of quinoa grain (chenopodium quinoa willd.)

Quinua (Chenopodium quinoa Willd.) es una planta que ha sido cultivada en las regiones andinas de Bolivia, Perú, Ecuador y Colombia. Su importancia se debe al alto contenido de proteínas y de aminoácidos esenciales en su grano. El objetivo principal en la investigación fue encontrar la relación entre el ácido fítico y la actividad de la fítasa en las variedades de quinua Nariño procedente de Colombia (QC), quinua Anapquis (QBA) y quinua -IICA 020 Oruro (QB) procedentes de Bolivia, y quinua Huancavelica de Perú (QP). Se encontraron diferencias significativas en las proporciones de proteína, grasa, fibra y, ceniza entre las cuatro variedades. El análisis de los aminoácidos esenciales mostró que las variedades de quinua tienen altas concentraciones de arginina, leucina, fenilalanina y lisina, y tirosina como aminoácidos semi-esenciales. La fracción de grasa presentó concentraciones altas de ácido oleico, linoleico, α-linolénico y ácido palmítico. Las variedades presentaron altos contenidos de P y Ca. El ácido fítico en QC (19.64%) fue significativamente más bajo que en las otras variedades. En la variedad QC (1052 FTU/kg) se encontraron altas proporciones de actividad de la fítasa. Se encontró relación significativa y negativa (r = -0.89) entre la actividad de la fítasa y el ácido fítico en todas las variedades.Quinoa (Chenopodium quinoa Willd.), is a plant that has been cultivated in the Andean region of Bolivia, Peru, Ecuador and Colombia. Its importance is due to the high proteins content and essential amino acids of its grain. The aim of this research was to investigate the relations between phytic acid P content and phytase activities of varieties quinoa Nariño-Colombia (QC), quinoa Anapqui’s-Bolivia (QBA), quinoa -IICA 020 Oruro-Bolivia (QB) and quinoa Huancavelica-Peru (QP). We found significant differences in the proportions of protein, fat, fibre, and ash among the four varieties. The analysis of essential amino acids showed that these varieties were rich in arginine, leucine, phenylalanine, lysine and valine, and tyrosine a semi essential amino acids. The fat fraction of all varieties contained high concentration of oleic acid, linoleic acid, α-linolenic acid and palmitic acid. The varieties were rich in phosphorus and calcium. The phytic acid P proportion in total P, in the QC (19,64%) was significantly lower than in other three varieties. In the variety QC (1052 FTU/kg) we found high concentration ofphytase. A significant negative correlation (r=-0.89) was found between the concentration of phytase activity and phytic acid P among the four varieties

Effect of Palmitoylchitosan on Cholesterol Homeostatis in Rats

The association between plasma cholesterol and coronary hearth disease is well established; thus the possibility of plasma cholesterol reduction by interfering with the absorption of sterols in the intestine has been studied

Možnosti náhrady antibiotik v chovech králíků

Možnosti náhrady antibiotik v chovech králíků