The influence of different feeding managements on the superovulatory response and the blood ammonia level in Japanese black cows
2002
"Sasaki, K. (Fukui-ken. Government Office (Japan)) | Kawai, T. | Maeda, J. "
"The aim of this study was to examine the influence of different feeding managements on the superovulatory response and the blood ammonia level in Japanese black cows. Japanese black cows were divided into three feeding groups (A feed group [high degradable intake protein (DIP) and low non fibrous carbohydrate (NFC)], B feed group [low DIP and low NFC], and C feed group [low DIP and high NFC]). The number of transferable embryos recovered from superovulated donors in the C feed group was higher than in the other feed groups (p<0.05). When the blood ammonia levels after feeding were examined once a week for a month, the level in the C feed group was lower (p<0.05) than in the other feed groups, and individual fluctuations in blood ammonia levels were narrow in the C feed group (p<0.05) compared to the other groups. Blood ammonia levels of all donor cows in the C feed group were 31-40microg/dl at 3 to 6 hours after feeding and the same levels were kept for one month. The plasma level of globulin in the C feed group was lower (p<0.05) than in the A feed group, the plasma level of total cholesterol in the C feed group was higher (p<0.05) than in the other groups and the plasma level of urea nitrogen in the C feed group was lower (p<0.05) than in the other groups for a month after feeding. These results show that the blood ammonia levels were changed low stably, and the superovulatory response was improved by giving the low DIP and high NFC feed to the donor."
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