Effect of nutrient levels during the far-off period on postpartum productivity in dairy cows
Effect of nutrient levels during the far-off period on postpartum productivity in dairy cows
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DOI：
10.1111/asj.12743
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发表时间：
2017-08-01
影响因子：
2
通讯作者：
Sugino, Toshihisa
中科院分区：
文献类型：
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作者：
Hirabayashi, Haruhi;Kawashima, Kenji;Sugino, Toshihisa
本研究旨在确定远期期间不同营养水平对泌乳牛产后代谢和产奶量的影响。 26 头经产奶牛在远期被分配进行三种饮食治疗：低能量饮食（L，n = 9，摄入总消化营养素需求的 80%）、中等能量饮食（M，n = 8，105%）和高能量饮食（H，n = 9，130%）。封闭期间，所有奶牛均获得105%的采食量。分娩后，所有奶牛均饲喂哺乳期饲料。 H组BCS恢复缓慢，产奶量低。 L组产后BCS恢复良好，哺乳持续性增加。 L组瘤胃内毒素活性低，产后初始排卵率高。这些发现表明，远期的高能量饮食会对产奶量产生有害影响。相比之下，远期限制饮食增加了对围产期代谢变化的适应性，改善了产后营养状态，增加了产奶量。此外，表明远期营养水平影响产后瘤胃内毒素活性和生殖功能。
The present study aimed to determine the effects of differing nutrient levels during the far-off period on postpartum metabolism and milk production in lactating cows. Twenty-six multiparous cows were assigned to three dietary treatments in the far-off period: a low-energy diet (L, n = 9, 80% intake of the total digestible nutrients requirement), a moderate-energy diet (M, n = 8, 105%) and a high-energy diet (H, n = 9, 130%). During the close-up period, all cows were provided with 105% intake. After parturition, all cows were fed a lactation diet. The BCS recovery was slow, and low milk yield was found in the H group. In the L group, BCS recovery was favorable after parturition, and lactation persistence was increased. The L group had low rumen endotoxin activity and a high initial ovulation rate after parturition. These findings indicate that a high-energy diet during the far-off period has a deleterious effect on milk production. In contrast, the restricted diet in the far-off period increased adaptability with respect to peri-parturition metabolic changes, improved the post-parturition nutritional state, and increased milk production. Furthermore, it suggests that the nutrient levels in the far-off period affect rumen endotoxin activity and reproductive function after parturition.