Abstract
Research was carried out on experimental sheep farm of the Institute for Animal Husbandry, Belgrade-Zemun. Trial included 60 lambs - crosses of F1 generation of Pirot Pramenka x W?rttemberg x Ile de France weaned at the age of 60 days. Nutrition treatment included study of three concentrated mixtures which were different in protein source (sunflower, soy bean and fish meal), i.e. share of proteins non-degradable at the level of reticulo-rumen: 43 (I) : 51 (II) : 58%(III). The effect of stated treatment in intensive fattening of lambs was monitored through production parameters. Obtained data was processed using standard statistical analysis. Average body mass of lambs at the beginning of trial, in treatments I: II: III was: 18,08: 18,12: 18,17 kg. After fattening of 75 days, final body mass of lambs in analogous treatments was: 30,78 (I) 33,52 (II) 35,17 kg (III) and average daily gain: 0,169: 0,205 : 0,227 kg. Per kilogram of realized gain of lambs, in analogous treatments, the following was consumed: 4,54 : 3,71 : 3,30 kg of dry matter of diet; energy: 33,77: 29,37 : 26,25 MJ; total proteins: 732 : 596 : 549 g. Research demonstrated that protein source in concentrate mixtures used in nutrition of fattening lambs (i.e. share of nondegradable protein in total proteins)had significant effect on production parameters, and the best performance was registered in lambs on treatment with fish meal (share of NP was 58%).
Highlights
Trial included 60 lambs – crosses of F1 generation of Pirot Pramenka x Württemberg x Ile de France weaned at the age of 60 days
Nutrition treatment included study of three concentrated mixtures which were different in protein source, i.e. share of proteins non-degradable at the level of reticulo-rumen: 43 (I) : 51 (II) : 58%(III)
The effect of stated treatment in intensive fattening of lambs was monitored through production parameters
Summary
Ispitivan je efekat korišćenja tri smeše koje su se razlikovale u pogledu udela proteina nerazgradivog na nivou buraga: 43% (I), 51% (II) i 58% (III), što se postiglo korišćenjem različitih izvora proteina: suncokretove sačme (I) , sojine sačme (II) i ribljeg brašna (III), na proizvodne parametre jagnjadi u tovu. Ključne reči: dnevni prirast, izvori proteina, jagnjad, konverzija, nerazgradivi protein. U cilju obezbeđenja optimalnog pula aminokiselina za određenu proizvodnju, neophodno je u obroku jagnjadi obezbediti frakciju proteina koji izbegavaju razgradnju u buragu (nerazgradivi protein). U cilju racionalnog korišćenja neophodno je da odnos razgradivih i nerazgradivih proteina u obroku jagnjadi bude na nivou koji je optimalan za određenu proizvodnju i u skladu sa potrebama životinje kao i mikroorganizama. Cilj istraživanja je bio proučavanje uticaja različitih izvora proteina obroka u intenzivnom tovu jagnjadi, na proizvodne parametre
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