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中國畜牧學會會誌

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篇名 乳牛轉換期添加丙二醇對血液性狀之影響
卷期 46增刊
並列篇名 Effect of propylene glycol supplementation on blood metabolites in transition dairy cow
作者 陳怡璇陳一明王思涵賈玉祥
頁次 227-227
關鍵字 乳牛丙二醇轉換期Dairy cowPropylene glycolTransition period
出刊日期 201712

中文摘要

轉換期為乳牛分娩前後三週,此時期乳牛子宮內的胎兒快速生長,胎兒體積壓迫瘤胃空間,使 得乳牛乾物質採食量明顯下降,容易有能量負平衡與脂肪代謝異常問題,提高乳牛代謝疾病的 發生率,例如:胎衣滯留、子宮炎、乳房炎與酮症,增加牛群被淘汰的機率造成牧場嚴重的經 濟損失。本試驗挑選 17 頭荷蘭泌乳牛,依胎次逢機分成兩組,於轉換期基礎日糧中,每天額 外補充 0(控制組,n=9)及 300 克(處理組,n=8)丙二醇,並於預產期前第 21、14、7 天、 分娩後 0、3、7、14 與 21 天採血分析血液中葡萄糖、非酯化脂肪酸(non-esterified fatty acids, NEFA)、酮體、麩胺酸草乙酸轉胺酶(glutamic oxaloacetic transaminase, GOT)、麩胺酸丙酮酸 轉胺酶(glutamic pyruvate transaminase, GPT)、麩胺基轉移酶(gamma glutamyltransferase, GGT) 與三酸甘油酯(triglyceride, TG)濃度。試驗結果顯示,處理組牛隻於產後第 7 天血中 GOT、 GGT 與 TG 顯著低於控制組(P < 0.05),而 NEFA 則有較低的趨勢(442 ± 240 vs. 727 ± 377 mol/L , P < 0.1),血糖與血酮濃度則無顯著差異。由上述結果得知,轉換期牛隻適當補充丙二 醇有助牛隻能量利用,減少能量負平衡發生的趨勢

英文摘要

The transition period of 3 weeks pre-calving until 3 weeks post-calving is associated with a peak incidence of metabolic disorders including placenta retention, mastitis and ketosis and the effects of these diseases on dairy cow health and production. During the transitional period, dry matter intake decreases five to seven days prior to calving. It was easy to have energy metabolism problems and increase culling chance. We did a trial with 17 transition dairy cows with no lameness and health. The treatments were supplementation either with or without (control group, n = 9; treatment group, n = 8) 300 g propylene glycol (PG) each day. Treatments were applied from 3 weeks before until 3 weeks after calving. Both groups received the same basal diet accorded by NRC. Blood was sampled at d − 21, -14, -7 relative to expected calving, on the day of calving and at d 3, 7, 14, 21 postpartum and analyzed for glucose, non-esterified fatty acids (NEFA), ketone, glutamic oxaloacetic transaminase (GOT), glutamic pyruvate transaminase (GPT), gamma glutamyltransferase (GGT) and triglyceride (TG). The results showed that GOT, GGT and TG of treatment group at d 7 postpartum were significant lower than control group (P < 0.05). Besides, PG supplementation decreased NEFA on calving (442 ± 240 vs. 727 ± 377 mol/L, P <0.1). There were no significant differences in glucose and ketone. Results from this study suggest that energy balance in periparturient dairy cows is improved by PG supplementation during the transition period.

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