Effect of a combination of diethylstilbestrol and methyltestosterone, sex and dietary protein level on performance and carcass characteristics of finishing swine.
نویسندگان
چکیده
N U T R I T I O N can markedly affect carcass leanness. There is evidence, recently reviewed by Wallace et al. (1966), that dietary restriction of either energy or total diet will bring about increased carcass leanness. Several workers have also reported improvement in carcass desirability with increasing levels of dietary protein or lysine (Ashton et al., 1955; Cahilly et al., 1963; Wagner et al., 1963; Bell, 1965). That sex is an important determinant of carcass leanness is indicated from the work of Cabill et al. (1960), Teague et al. (1964) and Tribble et al. (1965). These workers showed that gilts are leaner than barrows, but that boars are leaner than either barrows or gilts. Teague et al. (1964) demonstrated that implants of diethylstilbestrol brought about an improvement in carcass quality of boars. More recently, Jordan et at. (1965) reported that a combination of diethylstilbestrol and methyltestosterone when fed to finishing barrows and gilts increased carcass leanness and improved feed efficiency. The objectives of the experiments reported herein were (1) to establish response to a combination of diethylstilbestrol and methyltestosterone at a dietary protein level deemed superadequate and (2) to evaluate the effect of sex and dietary protein level upon response to the hormonal combination.
منابع مشابه
Effect of a combination of diethylstilbestrol and methyltestosterone, sex and dietary protein level on some lipids of finishing swine.
R ECENT reports (Baker et al., 1967a, b) indicate anabolic activity from orally-administered diethy, lstilbestrol plus methvltestosterone for finishing swine, particularly at adequate to superadequate levels of dietary protein. Because fat deposition was shown to be influenced by the hormonal combination, by sex and by dietary protein level, components of the serum lipid fraction were evaluated...
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عنوان ژورنال:
- Journal of animal science
دوره 26 5 شماره
صفحات -
تاریخ انتشار 1967