飼糧中補充鋅、銅與錳對荷蘭泌乳牛乳成分與血液性狀之影響

本試驗旨在探討於飼糧中補充有機鋅、銅與錳對荷蘭泌乳牛之乳成分及血液性狀之影響。將24頭泌乳中期荷蘭乳牛依體重、乳量、胎次與泌乳天數逢機分成兩組，分別於基礎日糧中補充0（對照組）及每天每頭補充360 mg鋅、125 mg銅及200 mg錳（試驗組）。試驗期間每30天進行生乳與血液之採集與分析，試驗共進行120天。試驗結果顯示，飼糧補充有機鋅、銅及錳30天有提高乳糖率與總固形物率之趨勢；而補充60天後有提升乳脂肪率、總固形物率及乳尿素態氮率之傾向。其餵飼後90天及120天之乳成分未受到試驗處理影響。血液性狀部分，飼糧補充有機鋅、銅及錳有減少餵飼後30天之血液丙胺酸胺基轉移酶與乳酸去氫酶之傾向，同時也有顯著提高膽固醇含量。但是在餵飼後60天則是有減緩丙胺酸胺基轉移酶、肌酸激酶、乳酸去氫酶及提高超氧化物岐化酶含量之傾向。餵飼後90天及120天補充有機鋅、銅及錳皆有顯著提高血液膽固醇含量，其餘血液各性狀無差異。試驗結果顯示，飼糧中補充有機鋅、銅與錳雖然對乳成分無顯著影響，但是對血中麩胺酸草乙酸轉胺酶、肌酸磷酸激酶與乳酸脫氫酶等酵素活性及超氧化物歧化酶之抗氧化活性有改善之現象。

關鍵字

血液性狀；荷蘭泌乳牛；有機銅；有機錳；有機鋅

並列摘要

The purpose of this study was to evaluate the effects of dietary supplementation of Zn, Cu and Mn on milk composition and blood traits of Holstein lactating cows. A total of 24 Holstein lactating cows were randomly divided into two groups according to their body weight, milk yield, parity and days in milk. Cows received diets adding 0 (control) or 360 mg organic zinc, 125 mg organic copper and 200 mg organic manganese (head/day). The raw milk and blood were analyzed and collected every 30 days and the trial was carried out for 120 days. The results showed that dietary supplementation of organic zinc, copper and manganese for 30 days had a tendency to increase milk lactose percentage and total solids percentage. After 60 days of supplementation, there was a tendency of increase in milk fat percentage, total solids rate, and milk urea nitrogen rate. The milk composition at 90 days and 120 days after feeding were not affected by treatment. The dietary supplementation of organic zinc, copper and manganese reduced in a tendency of decrease in blood alanine aminotransferase and lactate dehydrogenase 30 days after feeding, and also significantly increased cholesterol content. However, 60 days after feeding, there was a decrease in alanine aminotransferase, creatine kinase, lactate dehydrogenase, and an increase in superoxide dismutase contents. Supplementation of organic zinc, copper and manganese for 90 days and 120 days after feeding significantly increased blood cholesterol levels, but there was no significant difference in other blood traits. In conclusion, it was known that supplementation of organic zinc, copper and manganese in diet could have no significant effect on the milk component, but it could improve alanine aminotransferase, lactate dehydrogenase, creatine kinase and superoxide dismutase contents in antioxidant function.

並列關鍵字

Blood trait ； Holstein lactating cows ； Organic copper ； Organic manganese ； Organic Zinc ； Temperature-humidity index

國際替代計量

飼糧中補充鋅、銅與錳對荷蘭泌乳牛乳成分與血液性狀之影響

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