The influence of protein source and crossing system of lambs on wool quality parameters

The experiment included 30 lambs-crosses F1 generation: Pirot Pramenka (50%) x Württemberg (50%) and 30 crossbred F1 generations: Pirot Pramenka (12.5%) x Württemberg(37.5) x Ille de France (50%), weaned at 60 days of age, the average body weight of 18.0 kg. The mixtures varied in protein source: I - sunflower meal, II - soybean meal and III - fish meal. The share of undegradable protein was 43 : 51 : 58 %. The average diameter of the fibres in lambs on treatments I:II:III was 26.14 : 24.96 : 25.20 μm, and of two-breed (PxW) and three-breed (PxWxIDF) crosses: 25.38 and 25.49 μm. The average height of the wool fibre in lambs on treatments I:II:III was: 2.97 : 3.06 : 3.17 cm, and in two-breed (PxW) and three-breed (PxWxIDF) crosses 2.98 : 3.15 cm. The average length of the fibre in lambs on protein sources I:II:III was 4.62 : 5.08 : 5.11 cm and in two-breed (PXW) and three-breed (PxWxIDF) crosses 4.77 : 5.11 cm. Protein source in feed mixtures, and genotype of lambs significantly influenced the quality of wool expressed through diameter, height and length of the fibres. Eksperimentom je obuhvaćeno 30 jagnjadi-meleza F1 generacije pirotska pramenka (50%) x virtemberg (50%) i 30 meleza F1 generacije: pirotska pramenka (12,5%) x virtemberg (37.5) x Il de frans (50%), odbijenih na 60 dana starosti, prosečne telesne mase 18,0 kg. Smeše su se razlikovale u izvoru proteina: I - suncokretova sačma, II - sojina sačme i III - riblje brašno. Udeo nesvarljivih proteina je 43: 51: 58%. Prosečan prečnik vlakana u jagnjadi na tretmanima I: II: III je bio 26.14: 24.96: 25.20 μm, a kod dvorasnih (PxW) i trorasnih meleza (PxWxIDF): 25.38 i 25.49 μm. Prosečna visina vune u jagnjadi na tretmanima I: II: III je bila: 2.97: 3.06: 3.17 cm, a kod dvorasnih (PxW) i trorasnih (PxWxIDF) meleza: 2.98: 3.15 cm. Prosečna dužina vlakana u jagnjad na proteinskim izvorima I:II:III je bila 4.62: 5.08: 5.11 cm, a kod dvorasnih (PxW) i trorasnih (PxWxIDF) meleza 4.77: 5.11 cm. Izvor proteina u smešama hrane, kao i genotip jagnjadi, značajno su uticali na kvalitet vune izražen kroz prečnika, visinu i dužinu vlakana.