飼糧中補充維生素C與鐵對熱季期間荷蘭泌乳牛泌乳性能與血液性狀之影響

Effect of vitamin C and iron co-supplementation on lactation performance and blood parameters of Holstein cows during the hot season

張俊達(Chun-Ta Chang) ； 蕭宗法(Tzong-Faa Shiao) ； 楊德威(Der-Wei Yang) ； 歐修汶(Hsiu-Wen Ho) ； 林義福(Yih-Fwu Lin) ； 李春芳(Churng-Faung Lee) ； 蔡銘洋(Ming-yang Tsai) ； 王思涵(Szu-Han Wang)

《台灣農學會報》 18卷2期 (2017/06) Pp. 97-111

https://doi.org/10.6730/JAAT.201706_18(2).0001

摘要

本試驗目的探討熱季期間(6至7月份)於荷蘭泌乳牛飼糧中補充維生素C與鐵對泌乳性能及血液性狀之影響。試驗採用含10天變積期的完全逢機設計，將24頭泌乳中期(泌乳期168±41天)荷蘭乳牛依體重、乳量、胎次與泌乳天數逢機分成兩組，分別為提供基礎日糧之對照組及每天每頭補充30 g維生素C與600 mg鐵之處理組，為期60天。熱季期間(6至7月份)平均溫溼度指數(temperature-humidity index, THI)為83.1。試驗結果顯示，飼糧中補充維生素C與鐵未影響乾物質採食量、體重、乳產量及泌乳效率(產乳量/乾物質採食量)，牛乳的乳成分也未受到飼糧中補充維生素C與鐵顯著影響。血液性狀部分，飼糧中補充維生素C與鐵顯著增加血清中葡萄糖、血漿中血比容積(hematocrit)及血漿中平均紅血球容積(mean corpuscular volume, MCV)，其餘血清中總蛋白質、白蛋白、球蛋白、麩胺酸草乙酸轉胺酶(glutamic oxaloacetic transaminase, GOT)、鹼性磷酸酶(alkaline phosphatase)與乳酸脫氫酵素(lactate dehydrogenase, LDH)等，及血漿中紅血球、白血球、血紅素、血漿中平均紅血球血紅素含量(mean corpuscular hemoglobin, MCH)及平均紅血球血球素濃度(mean corpuscular hemoglobin concentration, MCHC)等皆未受到影響。綜上所述，熱季期間飼糧中補充維生素C與鐵並未影響牛隻生產表現，但是有提升血清葡萄糖及血漿中血比容積與平均紅血球容積的現象。

關鍵字

荷蘭泌乳牛 ； 鐵 ； 泌乳性能 ； 維生素C

並列摘要

The purpose of this study was to evaluate the effects of dietary supplementation of vitamin C and iron on lactation performance and blood parameters response of Holstein lactating cows during the hot season (June and July). A complete randomized design with 10 days covariate adjustment was adopted. A total of 24 Holstein lactating cows (average 168±41 days in milk) were assigned into two groups according to their body weight, milk yield, parity and days in milk. Cows received diets containing 0 (control group), and 30 g vitamin C and 600 mg iron (head/day) (treatment group) for 60 days. The average temperature-humidity index (THI) was 83.1. Results showed that diets added with vitamin C and irondid not affect dry matter intakes, milk yield, body weight, and milk efficiency (milk/intake). Adding vitamin C and iron did not significantly affect milk composition. Co-supplementation vitamin C and iron significantly increased serum glucose, plasma hematocrit, and mean corpuscular volume (MCV); however, the total protein, albumin, globulin, calcium concentrations, glutamic oxaloacetic transaminase, alkaline phosphatase and lactate dehydrogenase enzyme activities in serum, and red blood cells, white blood cells, hemoglobin, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration and platelet in plasma were not significantly affected by treatment group. In conclusion, co-supplementation of vitamin C and iron to the diet of lactating cows did not affect cow performance, but it significantly increased serum glucose, plasma hemoglobin and MCV during the hot season.

並列關鍵字

Holstein lactating cows ； Iron ； Milking performance ； Vitamin C

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