Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

1 st WorkshopXIII International Feed Technology Symposiumvalues of proteins in animal feed mixes are in the range from 15- 40% [11]. The changesin the protein content are shown in Figure 2.45Proteincontent, % 4035302520151050Still triticale Still corn \still corn with yeastproteinsFigure 2. Protein content (%) of the tested samplesThe cellulose content of the complete animal feed mixes is limited to 10% due to its lowdigestibility. In the stillage samples tested its content was in limits which are officiallyallowed. The cellulose content reaches the value of 6.74% in the triticale stillage, whilethe corn stillage has a lower content of cellulose for around 55%.The fat content of the stillage samples was in the range from 5.8-14.3%. The cornstillage has a higher fat content compared to the triticale stillage. The fat content is veryimportant for fatlings` feed and according to the official food regulations it shouldn’t bebelow 5% [11].The phosphor content of the samples is in the range from 0.534% to 1.49% with thegreatest value detected in the sample of corn stillage enriched with yeast. The value ofphosphor content of 1.49% is higher from the majority of upper phosphor limitsprescribed by the national feed regulations (average recommended values are from 0.6-0.8%), with an exception for complete animal feed mixes for the fatlings, where theupper phosphor value limit is 1.5%For a good animal feed it is important that it contains particular minerals in a properamount [12]. The content of minerals contributes to a higher quality of animal feed,especially in the case of mixes based on corn stillage. The content of copper with valuesranging from 17.72 mg/kg (corn stillage enriched with yeast) to 398.34 mg/kg (triticalestillage) is far above of the officially recommended value (5 mg/kg). A high increase inthe content can be noticed for the zinc, which is ranging from 47.90 mg/kg (corn stillageenriched with yeast) to 146.05 mg/kg (triticale stillage).In the sample of corn stillage enriched with yeast, a low sodium content of 0.055% maybe noticed. This is acceptable only for a few animal feed mixes officially prescribed byfood regulations. The sodium content of the other two samples is 0.112% (corn stillage)303