DIGESTIVE RESPONSES OF SHEEP TO A U D I T O R Y STIMULI l
نویسندگان
چکیده
Metabolism and rumen moti l i ty studies were conducted using yearling wethers subjected to three types of noise (at 75 and 100-dB intensities): United States of America Standard Institute (USASI) white noise; instrumental music and intermittent miscellaneous sounds (IMS). Animals ate less (P<.05) when subjected to auditory stimuli that exceeded background noise (48 dB). IMS at 75 and 100 dM increased water intake (P<.05) and metabolizable energy of the ration (P<.01) and improved apparent nutrient digestibilities (P<.03). Nitrogen retention was not affected by sound intensity or type. Level (P<.02), type (P<.05), and their interaction (P<.01) affected urinary creatinine output. After the sheep were exposed to auditory stimuli 15 min, their rumen moti l i ty was not altered. (
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