Four experiments were conducted utilizing either weanling or young adult normal male albino rats. These animals were fed either stock diets or semi-synthetic diets, containing either 0, 0.15, 0.3, 0.6 or 2.4 µg of diethylstilbestrol/gm, either by the trio or ad libitum feeding technique for periods of 6–15 weeks. It is concluded that diethylstilbestrol feeding in the albino rat induces statistically significant decreases in body weight gain, feed efficiency, body length, and testes size; it induces statistically significant increases in basal metabolic rate and in pituitary, thyroid and adrenal sizes.
Previous investigations have established that ammoniated industrial by-products are economical sources of nitrogen for beef cattle and sheep, but work on this nitrogen source is lacking in the dairy field. This experiment was established as preliminary to more investigation of the nutrition of dairy cattle. The supplementation of an ammoniated industrial by-product, hemicellulose extract (wood sugar derivative), at the 10% level in a grain ration for growing Holstein heifers was comparable in body weight gains and digestibility coefficients for crude protein (N X 6.25) to a similar grain ration supplemented with soybean oil meal. Ammoniated cane molasses at levels of 50% of the grain ration was not toxic when fed to a yearling dairy heifer. Many industrial plants in the United States have by-products that have been dumped into streams as wastes, causing pollution. If these by-products, upon ammoniation, can be used as economical nitrogen and energy extenders for ruminants, industrial plants and feeders of cattle, as well as consumers, may all benefit.
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