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    The effect of grazing lucerne on ewe fertility

    Davis, G. H.
    Abstract
    For efficient sheep production it is essential to get the largest possible number of viable lambs produced from the ewe flock. Any factor which causes a reduction in the lamb crop warrants close study in order to define that part of the reproductive process which is affected and the conditions under which the factor is operative. Following a number of isolated reports of disappointing lambing percentages where ewes were mated on lucerne, a trial was carried out at Lincoln College (Coop and Clark, 1960) which showed that mating ewes on lucerne may cause a delay in lambing and a reduction in the number of twin births. As in the trial of Coop and Clark (1960), the lucerne in the present trial was grown on a different soil type to that of the ryegrass-white clover pasture. The lucerne was grown at the Ashley Dene farm where the soil type is a shallow very silt stony loam and the ryegrass-white clover was grown at the Research Farm on a silt loam. This unavoidable situation could have an influence upon the results of the lucerne-grass comparison.... [Show full abstract]
    Keywords
    ewes; ewe fertility; lucerne; grazing; reproductive performance; liveweight; lambing percentage
    Fields of Research
    070206 Animal Reproduction; 070202 Animal Growth and Development
    Date
    1970
    Type
    Thesis
    Access Rights
    Digital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library.
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    • Theses and Dissertations with Restricted Access [2207]
    • Department of Agricultural Sciences [1444]
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