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  • Title: Effect of defaunating the rumen on growth and carcass composition of lambs.
    Author: van Nevel CJ, Demeyer DI, van de Voorde G.
    Journal: Arch Tierernahr; 1985 May; 35(5):331-7. PubMed ID: 2412527.
    Abstract:
    The effect of defaunating the rumen on growth performance and carcass composition of lambs fed a molasses-urea diet was investigated. Before the growth trial, all the animals were defaunated. Based on live weight and daily gain during a preliminar period, the animals were divided in two groups whereafter one group was refaunated. Defaunation caused a decrease in propionic acid percentage in the rumen. Daily gain and food conversion efficiency were better in the defaunated group, but only during the first five weeks. The response over the whole trial (0-9 weeks) remained positive however. There was a trend towards more meat and less fat in the carcass of defaunated lambs. The fact that two animals died during the defaunation procedure indicates the need for a completely harmless and effective defaunating agent.
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