Fish meal and needs for phosphorus in pig nutrition | Ribja moka in potrebe po fosforju v prehrani prasicev
2005
Balazic, M., Gornja Radgona (Slovenia). Prasicereja Podgrad d.d., Podgrad 38, 9250 Gornja Radgona
In the article is presented the meaning of usage of fish meal and knowledge of pigs needs for phosphorus. Fish meal as source of essential amino acids, vitamins (A, D and B), minerals (selenium, magnesium, iron, calcium and phosphorus), n-3 fatty acids and high values of raw proteins (62 to 71 %) is still an excellent raw material for making a fodder at intensive pig breeding. With qualitative fish meal in a meal we influence the increased growth and loading of nitrogen in the organism or in other animal products. This can be achieved with supplementing a meal with limitated amino acids (lizin, metionin, treonin, triptifan). With decreased share of proteins in fodder mixtures the production and slaughting results can be as good as with higher (normal) concentration of proteins. If corrections are made for basic endogenous amino acid loses in ileal digestion of pigs, apparent amino acid digestibilities can be transformed into so called standardized ileal digestibility, that is independent of values of amino acids in a meal. The balance between protein synthesis and breakdown regulates the whole body protein mass. Synthesis of new proteins is achieved by multiple series of complex reactions. With supplementing the fodder with limitated amino acids the calculated nitrogen excretion has been lowered for at least 30 %. The fattening, carcass and meat quality results of our experiment show that phytase supplementation completely substituted the need for anorganic phosphorus addition to the diet and reduced phosphorus excretion for about 70 %.
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