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Reproductive performance of medium white breeder toms fed diets with varying metabolizable energy levels and 7 percent crude protein


, : Reproductive performance of medium white breeder toms fed diets with varying metabolizable energy levels and 7 percent crude protein. Poultry Science 67(11): 1619-1624

An experiment was conducted to study the effects of feeding diets composed of triticale (var: Flora) with varying ME levels and 7% CP on fertilizing capacity and semen quality of Medium White breeder toms. Thirty-nine breeder toms were fed ad libitum from 30 to 54 wk of age one of four dietary treatments: 14% CP with 2,292 kcal ME/kg; 7% CP with 2,919 kcal ME/kg; 7% CP with 2,719 kcal ME/kg; and 7% CP with 2,539 kcal ME/kg. Semen volume (SV), packed spermatozoa volume (PSCV), BW, testicular weight (TW), and fertilizing capacity of semen were measured. No differences for SV, PSCV, TW, calculated daily feed, and estimated energy consumption were observed among the dietary energy levels fed. The estimated dialy protein intake was higher (P < .05) for toms fed the 14% 2,892-ME diet than 2,539, 2,719, and 2,919-ME diets containing 7% CP. The 7% 2,919-ME diet reduced (P < .05) the fertilizing capacity of spermatozoa, whereas the 7% 2,539-ME diet decreased the percentage of fertile eggs hatched. Under the conditions of this experiemnt, Medium White Breeder toms maintained fertilizing capacity and semen quality when provided a diet containing 7% CP with 2,719 kcal ME/kg.

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