Effects of different nutrition levels on growth performance, carcass characteristics and meat quality of Wuzhumuqin lamb

doi:10.11686/cyxb2018317

Abstract

Abstract: The objective of this study was to investigate the growth performance, carcass characteristics, meat quality and fatty acid composition of Mongolian lamb fed pellet and complete pellet. Twenty healthy Mongolian lambs of the same age (six months) and similar body weight (28.83±0.19) kg were randomly divided into two groups, and a control group of ten sheep were fed solely grass pellet, while a second trial group were fed grass pellet with concentrate. It was found that feeding grass pellet with concentrate significantly increased the average daily gain from 56.33 g·d^-1 (control) to 60.00 g·d^-1 (trial group). A very large number of parameters determined showed no difference between control and trial groups, including: body weight before slaughter, carcass weight, dressing percentage, crude protein (CP), ether extract (EE), organic matter (OM), dry matter (DM), calcium (Ca), phosphorus (P), pH₁, pH₂₄, marbling score, Lightness (L^*), cooking yield, shear force, C6:0, C8:0, C10:0, C11:0, C17:1n7, C18:2n6c, C20:1, C20:2, C20:3n3, C20:5n3, C22:2n6, saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), polyunsaturated fatty acids (PUFA), ∑n-6, ∑n-3, Val, Met, Leu, Phe, Lys, EAA (essential amino acid), Asp, Ser, Gly, Ala, Cys, His, Pro, NEAA (nonessential amino acid), EAA/NEAA of control group and trial group (P>0.05). Parameters higher (P<0.05) in the trial group than in the control group were: net meat mass, net meat percentage, loin muscle area, GR (carcass fat content) value, redness (a^*), yellowness (b^*), cholesterol, water loss rate, C13:0, C14:0, C17:0, C18:3n6, C18:3n3, C20:0, Ile, Tyr, Arg. Conversely, parameters higher (P<0.05) in the control group than in the trial group were: C4:0, C12:0, C14:1n5, C15:0, C15:1n5, C16:0, C16:1n7, C18:0, C18:1n9c, n-6/n-3, Thr and Glu. These results indicate that feeding Wuzhumuqin lamb is more beneficial to growth performance and meat quality than feeding grass pellet with concentrate.

Key words: Wuzhumuqin lamb, native grass pellet, concentrate, growth performance, carcass characteristics, meat quality

DU Shuai, YOU Si-han, BAO Jian, Gegentu, JIA Yu-shan. Effects of different nutrition levels on growth performance, carcass characteristics and meat quality of Wuzhumuqin lamb[J]. Acta Prataculturae Sinica, 2019, 28(6): 196-203.

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