Effect of dietary protein to energy ratio of milk replacer on growth and body composition of pre-weaned lambs reared artificially

被引:8
|
作者
Herath, H. M. G. P. [1 ,2 ]
Pain, S. J. [1 ]
Kenyon, P. R. [1 ]
Blair, H. T. [1 ]
Morel, P. C. H. [1 ]
机构
[1] Massey Univ, Sch Agr & Environm, Private Bag 11222, Palmerston North 4442, New Zealand
[2] Sabaragamuwa Univ Sri Lanka, Fac Agr Sci, Dept Livestock Prod, Belihuloya, Sri Lanka
关键词
Body composition; Growth; Lamb; Milk replacer; Protein to energy ratio; NUTRITIONAL-REQUIREMENTS; WEIGHT-GAIN; LACTATION; PERFORMANCE; REPRODUCTION; DEPOSITION; EFFICIENCY; NITROGEN; LEVEL; FAT;
D O I
10.1016/j.anifeedsci.2020.114478
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
This study aimed to determine the effect of changing the dietary crude protein to metabolisable energy ratio (CP:ME) of milk replacer on growth and body composition of pre-weaned lambs. Thirty-two Romney twin-born ram lambs were selected with four lambs being slaughtered at 24 h post-partum to estimate initial body composition. The remaining twenty-eight lambs were assigned to one of three nutritional treatments. Treatments consisted of either (i) a commercial milk replacer (CMR, n = 10); (ii) a high protein milk replacer (HPM, n = 9) or (iii) a mix of normal milk replacer and milk protein concentrate (MB, n = 9). All lambs were fed at 2.1 times their maintenance requirement. The CP:ME ratio of MB was adjusted twice-weekly to match the lambs CP and ME requirements for growth and maintenance over time. All lambs were slaughtered at 22 kg live weight (LW). The LW and chemical composition of carcass and viscera plus blood were determined. The combined CP:ME ratio of milk and pellets was greater for the HPM lambs than MB lambs, which was greater (P < 0.0001) than CMR lambs. Daily ME intake was greater (P < 0.05) in MB compared to HPM and CMR, which did not differ (P > 0.05). Average daily LW gain was higher (P < 0.05) in both HPM and MB lambs than CMR lambs. The ME and CP intakes per kilogram LW gain were greater (P < 0.05) for CMR and HPM lambs, respectively than MB lambs. Omental fat content at slaughter was lowest (P < 0.05) and gut fill was greatest (P < 0.05) in HPM, while CMR and MB did not differ (P > 0.05) for either parameters. Fat content of the carcass and viscera plus blood was lowest (P < 0.05) in HPM whilst, there was no difference (P > 0.05) between CMR and MB. Lambs fed HPM had lower (P < 0.05) daily fat deposition than CMR, which was highest (P < 0.05) in MB. Daily dry matter deposition was greater (P < 0.05) in MB than both CMR and MB, which did not differ (P > 0.05). In conclusion, adjusting the CP:ME ratio of milk replacer to match the lambs' theoretical requirement improves growth performance of artificially reared lambs. Further studies are required to determine the optimal CP:ME ratio effect of milk replacer, its cost effectiveness and to examine post-weaning growth effects.
引用
收藏
页数:9
相关论文
共 50 条
  • [21] The effect of milk replacer composition on growth and body composition of Holstein heifer calves
    Hill, S. R.
    Daniels, M.
    Knowlton, K. F.
    James, R. E.
    Pearson, R. E.
    McGilliard, M. L.
    Akers, R. M.
    JOURNAL OF ANIMAL SCIENCE, 2007, 85 : 297 - 297
  • [22] Effect of milk replacer and concentrate intake on growth rate, feeding behaviour and systemic metabolite concentrations of pre-weaned bull calves of two dairy breeds
    Byrne, C. J.
    Fair, S.
    English, A. M.
    Johnston, D.
    Lonergan, P.
    Kenny, D. A.
    ANIMAL, 2017, 11 (09) : 1531 - 1538
  • [23] EFFECT OF CHANGES IN DIETARY-FAT ON BODY-COMPOSITION OF ARTIFICIALLY REARED RATS
    SCHMUDE, L
    EVERS, WD
    NUTRITION REPORTS INTERNATIONAL, 1986, 34 (04): : 681 - 690
  • [24] The effect of milk replacer composition on growth and body composition of Holstein heifer calves.
    Hill, S. R.
    Daniels, K. M.
    Knowlton, K. F.
    James, R. E.
    Pearson, R. E.
    McGilliard, M. L.
    Akers, R. M.
    POULTRY SCIENCE, 2007, 86 : 297 - 297
  • [25] STUDIES ON THE GROWTH AND CARCASS COMPOSITION IN DALDALE WETHER LAMBS .2. THE EFFECT OF DIETARY-PROTEIN ENERGY RATIO
    SOEPARNO
    DAVIES, HL
    AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 1987, 38 (02): : 417 - 426
  • [26] Effect of Lowering Dietary Protein with Constant Energy to Protein Ratio on Growth, Body Composition and Nutrient Utilization of Broiler Chicks
    Kamran, Z.
    Sarwar, M.
    Nisa, M.
    Nadeem, M. A.
    Ahmad, S.
    Mushtaq, T.
    Ahmad, T.
    Shahzad, M. A.
    ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 2008, 21 (11): : 1629 - 1634
  • [27] Growth, body composition and energy utilisation in pre-ruminant goat kids - Effect of dry matter concentration in the milk replacer and animal age
    Sampelayo, MRS
    Allegretti, L
    Extremera, EG
    Boza, J
    SMALL RUMINANT RESEARCH, 2003, 49 (01) : 61 - 67
  • [28] Effect of dietary lipid level and protein energy ratio on growth and body composition of largemouth bass Micropterus salmoides
    Bright, LA
    Coyle, SD
    Tidwell, JH
    JOURNAL OF THE WORLD AQUACULTURE SOCIETY, 2005, 36 (01) : 129 - 134
  • [29] NUTRITION OF ARTIFICIALLY REARED LAMBS .2. EFFECT OF FEED RESTRICTION AT 3 STAGES OF GROWTH ON GROWTH AND CARCASS COMPOSITION
    MORGAN, JA
    OWEN, JB
    ANIMAL PRODUCTION, 1972, 15 (DEC): : 293 - &
  • [30] Effect of dietary protein:lipid ratio on growth and body composition in bullfrog (Lithobates catesbeianus)
    Fonseca-Madrigal, Jorge
    Andrade-Lopez, Themis Sofia
    Martinez-Palacios, Carlos Antonio
    Chavez-Sanchez, Maria Cristina
    Olvera-Novoa, Miguel Angel
    Navarrete-Ramirez, Pamela
    Raggi, Luciana
    Martinez-Chavez, Carlos Cristian
    Concha-Santos, Sibila
    Rios-Duran, Maria Gisela
    REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2023, 52