Effects of Dietary Linseed Oil and Linseed on Slaughter Performance, Organ Growth and Development and Meat Quality of Cashmere Goat Lambs

LIU Shulin; WANG Xue; LI Yinhao; GUO Xiaoyu; ZHAO Yanli; SHI Binlin; YAN Sumei

doi:10.3969/j.issn.1006-267x.2021.02.029

2021 , Vol. 33 >Issue 2: 877 - 887

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.02.029

Effects of Dietary Linseed Oil and Linseed on Slaughter Performance, Organ Growth and Development and Meat Quality of Cashmere Goat Lambs

LIU Shulin ,
WANG Xue ,
LI Yinhao ,
GUO Xiaoyu ,
ZHAO Yanli ,
SHI Binlin ,
YAN Sumei

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Key Laboratory of Animal Nutrition and Feed Science in Inner Mongolia Autonomous Region, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China

Received date: 2020-07-06

Online published: 2021-02-04

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Abstract

This experiment was conducted to investigate the effects of dietary linseed oil and linseed on slaughter performance, organ growth and development and meat quality of cashmere goat lambs under stall-feeding condition. The experiment adopted a single-factor randomized block design, sixty 4-month-old Albas weaning lambs with body weight of (18.60±0.10) kg were randomly divided into 3 groups [control group (CON group), linseed oil group (LSO group) and linseed group (HLS group)] with 4 replicates per group and 5 lambs per replicate. During early fattening stage (1 to 30 d), middle fattening stage (31 to 60 d) and late fattening stage (61 to 90 d), lambs in the CON group were fed basal diets (concentrate-to-forage ratio was 5:5), lambs in the LSO group were fed basal diets supplemented with 2.0%, 2.0% and 2.5% linseed oil, and lambs in the HLS group were fed basal diets supplemented with 5.5%, 5.5% and 7.0% heated linseed (stir-fried at 120 ℃ for 10 min). The pre-experimental period lasted for 14 days, and the experimental period lasted for 90 days. The results showed as follows: 1) the carcass weight, dressing percentage, kidney fat weight, tail fat weight and fat tissue weight of lambs of LSO group were significantly higher than those of HLS group (P<0.05). 2) Compared with the CON group, the weights of feet+wool and skin and head+feet+wool and skin+blood of lambs of LSO group were significantly increased (P<0.05), while the HLS group was significantly decreased (P<0.05). Compared with the CON group and HLS group, the weights of heart, kidney and internal organ of lambs of LSO group were significantly increased (P<0.05), while the indexes of lung and pancreas were significantly decreased (P<0.05). Compared with the CON group, the reticulum weight of lambs of LSO group and HLS group was significantly increased (P<0.05), and the omasum weight of lambs of HLS group was significantly increased (P<0.05). 3) The cooking loss and redness value of longissmus dorsi of lambs of HLS group were significantly higher than those of LSO group (P<0.05), and the brightness value was significantly lower than that of LSO group (P<0.05). Compared with the CON group, the contents of dry matter in triceps brachii and crude protein in longissmus dorsi of lambs of LSO group and HLS group were significantly increased (P<0.05). In conclusion, dietary linseed oil increases the percentage to body weight of external tissue organs, internal organs and digestive tract of cashmere goat lambs, the slaughter performance is better, and the fat deposition is increased; the meat color and muscle nutritional value of lambs fed linseed diet are better than lambs fed linseed oi diet.

Key words： linseed oil; linseed; cashmere goat lambs; slaughter performance; organ index; meat quality

Cite this article

LIU Shulin , WANG Xue , LI Yinhao , GUO Xiaoyu , ZHAO Yanli , SHI Binlin , YAN Sumei . Effects of Dietary Linseed Oil and Linseed on Slaughter Performance, Organ Growth and Development and Meat Quality of Cashmere Goat Lambs[J]. Chinese Journal of Animal Nutrition, 2021 , 33(2) : 877 -887 . DOI: 10.3969/j.issn.1006-267x.2021.02.029

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