Comparison the efficiency of supplementary feed mixtures containing NPN compounds in cattle fattening
| Autor: | Zvonimir Steiner, Mario Ronta, Ivan Balentić, Ivana Prakatur, Željka Klir Šalavardić, Josip Novoselec |
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| Přispěvatelé: | Antunović, Zvonko, Janječić, Zlatko |
| Jazyk: | chorvatština |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Krmiva : Časopis o hranidbi životinja, proizvodnji i tehnologiji krme Volume 63 Issue 1 |
| ISSN: | 0023-4850 1848-901X |
| Popis: | Cilj istraživanja bio je usporediti učinak dopunskih smjesa s većim i manjim udjelom bjelančevina, a koje sadrže sporootpuštajuće neproteinske dušične (NPN) spojeve u tovu junadi na proizvodne pokazatelje i cijenu koštanja. U pokusu su bile 24 životinje ženskog spola križanih u tipu belgijskog plavog goveda, ravnomjerno podijeljene u dvije skupine. Trajanje pokusa iznosilo je 213 dana. Tijekom pokusa od proizvodnih pokazatelja praćeni su tjelesna masa, prosječni dnevni prirast te konverzija hrane. Osim proizvodnih pokazatelja praćena je i cijena koštanja prirasta. Provedena su četiri vaganja, od čega su dva vaganja bila pojedinačna dok su ostala dva vaganja bila grupna. Junad je hranjena TMR obrocima ujednačenih nutritivnih vrijednosti u koje su uključene dopunske smjese različite bjelančevinaste vrijednosti koje sadrže sporootpuštajuće NPN spojeve. U obrok P1 skupine bila je uključena dopunska smjesa s većom, dok je obrok P2 skupine sadržavao smjesu s manjom bjelančevinastom vrijednošću. Rezultati na kraju istraživanja pokazali su nešto veće prosječne dnevne priraste (1,27 : 1,18 kg/dan), u korist P1 skupine. Ukupna konverzija hrane bila je nešto niža kod P1 skupine u odnosu na P2 skupinu (6,4 : 6,6 kg/kg), dok je cijena koštanja po jedinici prirasta bila ujednačena tijekom cijelog istraživanja. Na kraju istraživanja može se zaključiti kako se primjenom NPN spojeva uz pažljivo balansiranje obroka može postići profitabilan i siguran tov junadi. The aim of the study was to compare the effect of supplementary mixtures with higher and lower protein content, which contain slow-release non-protein nitrogen (NPN) compounds in cattle fattening on production indicators and cost price. In the experiment there were 24 female crossbreeds in the Belgian Blue cattle type that were evenly divided into two groups. The duration of the experiment was 213 days. During the experiment, body weight, average daily gain and feed conversion were monitored as well as, the cost price of gain. Four weighings were performed, of which two weighings were individual while the other two weighings were group weighings. Cattle were fed TMR meals of uniform nutritional value that included supplemental mixtures of different protein value containing slow-release NPN compounds. A supplemental mixture with a higher protein content was included in the P1 group meal, while the P2 group meal contained a mixture with a lower protein value. The results at the end of the study showed slightly higher average daily gains (1.27: 1.18 kg / day), in favor of the P1 group. Total feed conversion was slightly lower in the P1 group compared to the P2 group (6.4: 6.6 kg / kg), while the cost price per unit of body weight gain was uniform throughout the study. At the end of the research it can be concluded that the use of NPN compounds with careful balancing of meals can achieve profitable and safe meat production. |
| Databáze: | OpenAIRE |
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