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Journal of Animal Science, Vol 75, Issue 8 2073-2077, Copyright © 1997 by American Society of Animal Science

JOURNAL ARTICLE

Preference of sheep and goats for extracts from high-grain concentrate

H. Dohi and A. Yamada
Department of Ecology, National Grassland Research Institute, Nishinasuno, Tochigi, Japan.

Appetite stimulants were extracted and partially isolated from high-grain concentrate. The stimulants were fed daily and were palatable to sheep and goats used in the experiments. The stimulative effects were tested by comparing the intake of two types of hay: with or without the extracts. Diethylether and n-pentane extracts of the concentrate stimulated feeding in sheep (P < .01 and P < .05, respectively). However, methanol extracts had no significant stimulative effect on selective feeding in sheep. Goats also preferentially fed on hay sprayed with the diethyl ether extracts (P < .01). The diethyl ether extracts were divided into acid, neutral, and basic fractions. Sheep and goats had a marked preference for the acid fraction only (P < .01 and P < .05, respectively). These results suggest that specific chemicals to increase palatability of hay are present in high-grain concentrate and that the chemical are nonpolar, acidic substances.




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Copyright © 1997 by the American Society of Animal Science.