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題名 | 飼糧中添加有機鉻對熱季期間荷蘭泌乳牛泌乳與血液性狀之影響=Effect of Organic Chromium Supplementation on Lactation Performance and Blood Parameters of Holstein Cows during Hot Season |
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作者 | 張俊達; 蕭宗法; 楊德威; 歐修汶; 謝昭賢; 王思涵; 李春芳; | 書刊名 | 畜產研究 |
卷期 | 49:1 2016.03[民105.03] |
頁次 | 頁19-25 |
分類號 | 437.111 |
關鍵詞 | 荷蘭泌乳牛; 泌乳性能; 有機鉻; Holstein lactating cows; Lactation performance; Organic chromium; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗目的探討在熱季 (六至七月份 )時,於荷蘭泌乳牛飼糧中添加有機鉻對其泌乳性能表現與血液生化值之影響。 24頭荷蘭泌乳牛 (泌乳期 187 ± 41天 ),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 0.5 ppm (處理組 )有機鉻。本試驗夏季期間平均溫溼度指數 (temperature-humidity index, THI)為 82.8,牛隻處於中度熱緊迫狀態。試驗結果顯示,乾物質採食量、產乳量、體重及泌乳效率 (產乳量 /乾物質採食量 )並未受飼糧中補充有機鉻所影響。有機鉻的補充具提高乳糖率 (P = 0.09)及非脂固形物率 (P = 0.14)之趨勢,但未影響乳脂率、乳蛋白質率、總固形物率與體細胞數等乳成分。飼糧中補充有機鉻顯著降低血中胰島素濃度 (P < 0.05),及提升葡萄糖與胰島素比值之趨勢 (P = 0.13)。血中麩胺酸草乙酸轉胺酶 (glutamic oxaloacetic transaminase, GOT)也因飼糧中補充有機鉻而有降低活性之趨勢 (P = 0.06),但麩胺酸丙酮酸轉胺酶 (glutamic pyruvate transaminase, GPT)、肌酸激酶 (creatine kinase, CK)與乳酸脫氫酵素 (lactate dehydrogenase, LDH)皆未受到影響。由上述結果得知,熱季期間於飼糧中補充 0.5 ppm有機鉻,雖未影響乾物質採食量、產乳量,但具提升乳糖率與非脂固形物率之趨勢,補充有機鉻顯著的降低牛隻血中胰島素,同時具提高葡萄糖與胰島素之比值與降低血中麩胺酸草乙酸轉胺酶之趨勢。 |
英文摘要 | The purpose of this study was to evaluate the effects of dietary supplementation of organic chromium on lactation performance and blood traits of Holstein lactating cows during hot season (June 1st and July 31st). A total of 24 Holstein dairy cows (average of days in milking 187 ± 41 days) were randomly assigned into two groups according to their body weight, milk yield, parity and days in milk. The cows fed the diets containing 0 (control) and 0.5 ppm of organic chromium. During the experimental period, the average temperature-humidity index (THI) was 82.8 that mean the cows were suffering from severe stress. The results showed that Holstein lactating cow added chromium did not affect their dry matter intakes, milk yield, body weight and milk efficiency (milk/intake). Added 0.5 ppm chromium had a trend to increased milk lactose (p = 0.09) and solid-not-fat concentration (p = 0.14), however in the milk fat, milk protein, total solid and somatic cell count were not significantly different. There was significantly lower blood insulin concentration when added chromium (p < 0.05), but in the glucose concentration and insulin ratio (p = 0.13) had tends increased. The blood GOT (p = 0.06) content had a trend decrease when chromium added. Other enzyme activities of creatine kinase, glutamate-pyruvate transaminase and lactate dehydrogenase were not different by added chromium. In conclusion, 0.5 ppm chromium supplementation in Holstein lactating cow diet during the hot season, did not affect in dry matter intake and milk production, but there was a trend of increase milk lactose, solid-not-fat concentration and the ratio of glucose and insulin and decreased blood insulin and GOT. |
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