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Peter Patráš


The experiment was conducted to evaluate the effect of added fiber into diets on absorption and distribution of nitrogen at different levels of dietary nitrogen. Four diets were designed with a combination of two concentrations of fiber: high (4.46 %; HF) and low (3.25 %; LF) level of fiber, and two levels of dietary nitrogen: high (18.8 %; HP) and low (14.0 %; LP) dietary nitrogen. Significant effects of fiber intake on increased dry matter intake were found only in one case. The nitrogen intake was not affected by the fiber content. Changes in the proportion of excreted nitrogen in urine and faeces were proven. Changing the nitrogen content of the feed has a more significant effect (P < 0.03) than changing the fiber content (P < 0.05). Very high coefficient of determination between nitrogen absorption and nitrogen intake calculated for the diets with low fiber content was R2 = 0.91 and for diets with high fiber R2 = 0.97. By comparing the differences in nitrogen digestibility expressed in g.d-1 nitrogen, significant deviation was found only in the HFHP group (+ 6.37 g.d-1 = + 19.9 %; P = 0.03) among the groups with different fiber content. In retention, we found a positive change comparing the groups LFHP vs. HFHP, + 6.22 g.d-1 = + 25 % (P = 0.05). It is the same pair of diets in which we found also a significant difference in dry matter intake (+ 15 %). Absorption and retention of nitrogen, expressed as a percentage of N intakes, did not decrease in any of the experimental groups irrespective of nitrogen and fiber content in the diet. These data suggest that fiber added into a diet with higher content of CP increased nitrogen in faeces, reduced nitrogen in urine, positively affected the overall balance of N and had only weak effect on its absorption.

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AOAC. (1998). Official Methods of Analysis, 16th ed. Association of Official Analytical Chemists, Washington, D.C., USA.

Aarnink, A. J. A. & Verstegen, M. W. A. (2007). Nutrition, key factor to reduce environmental load from pig production. Livestock Science, 109, 194−203.

Basset-Mens, C. & van der Werf, H. M. G. (2005). Scenario-based environmental assessment of farming systems: the case of pig production in France. Agriculture Ecosystems & Environment, 105, 127−144.

Fernandez, J. A., Poulsen, H. D., Boisen, S., Rom, H. B. (1999). Nitrogen and phosphorus consumption utilisation and losses in pig production: Denmark. Livestock Production Science, 58, 225−242.

Galassi, G., Crovetto, G. M., Malagutti, L. (2007). Growth and slaughter performance, nitrogen balance and ammonia emission from slurry in pigs fed high fibre diets. Italian Journal of Animal Science, 6, 227−239.

Högberg, A., Lindberg, J. E. (2004). Influence of cereal non-starch polysaccharides on digestion site and gut environment in growing pigs. Livestock Production Science, 87, 121−130.

Jarrett, S., Ashworth, C. (2018). The role of dietary fibre in pig production, with a particular emphasis on reproduction. Journal of Animal Science and Biotechnology, 9, 59. Doi: 10.1186/s40104-018-0270-0

Le Goff, G., Noblet, J., Cherbut, C. (2003). Intrinsic ability of the faecal microbial flora to ferment dietary fiber at different growth stages of pigs. Livestock Production Science, 81, 75−87.

Lizardo, R., Aumaître, A. (2001). Non-starch polysaccharides of sugar-beet pulp improve the adaptation to the starter diet, growth and digestive process of the weaned pig. In Brufau J. (ed.). Feed manufacturing in the Mediterranean region. Improving safety: From feed to food. Zaragoza, 185−189.

Longland, A. C., Carruthers, J., Low, A. G. (1994). The ability of piglets 4 to 8 weeks old to digest and perform on diets containing two contrasting sources of non-starch polysaccharide. Animal Science, 58, 405−410.

Nahm, K. H. (2003). Influence of fermentable carbohydrates on shifting nitrogen excretion and reducing ammonia emission of pigs. Critical Reviews in Environmental Science and Technology, 30, 165−186.

NRC., 1998. Nutrient requirements of swine. 10th ed., The National Academies Press. Washington, D.C.

Montagne, L., Pluske, J. R. & Hampson, D. J. (2003). A review of interactions between dietary fibre and the intestinal mucosa. and their consequences on digestive health in young non-ruminant animals. Animal Feed Science and Technology, 108, 95−117.

Ramonet, Y., Robert, S., Aumaître, A., Dourmad, J. Y. & Meunier-Salaün, M. C. (2000). Influence of the nature of dietary fibre on digestive utilization. some metabolite and hormone profiles and the behaviour of pregnant sows. Animal Science, 70, 275−286.

Williams, B. A., Verstegen, M. W. A. & Tamminga, S. (2001). Fermentation in the large intestine of single-stomached animals and its relationship to animal health. Nutrition Research Reviews, 14, 207−227.

Zervas, S. & Zijlstra, R. T. (2002). Effects of dietary protein and fermentable fiber on nitrogen excretion patterns and plasma urea in grower pigs. Journal of Animal Science, 80, 3247−3256.