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首页> 外文期刊>Turkish Journal of Veterinary and Animal Sciences >The effects of varying levels of dietary starch on reproductivetraits in lactating dairy cows
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The effects of varying levels of dietary starch on reproductivetraits in lactating dairy cows

机译：日粮淀粉水平变化对泌乳奶牛生殖特性的影响

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摘要

The aim of this study was to determine the effects of three different dietary starch levels on postpartum milk yield, blood metabolites, and reproductive traits in cows. A total of 23 primiparous Holstein-Friesian cows were fed three different diets including different starch levels on a dry matter basis from parturition until day 80. Cows were randomly assigned into the three groups according to the starch levels: low (LS, 16%, n = 7), medium (MS, 20%, n = 8), and high (HS, 24%, n = 8). Milk yields were recorded daily, and body condition score (BCS) was determined every week. Transrectal ultrasonography was performed, and blood samples were taken three times each week to determine reproductive traits and blood metabolites. Although the milk yield was greater in the LS group compared to the other groups, BCS and blood metabolites did not differ among the groups. The postpartum follicular patterns, times of first postpartum ovulation, and involution processes did not differ among the groups. In addition, the ovulatory follicle and corpus luteum sizes and the progesterone levels after induced estrus were numerically greater in HS than other groups. Thus, there were no effects of starch levels on postpartum reproductive traits.
机译：这项研究的目的是确定三种不同的饮食淀粉水平对奶牛产后产奶量，血液代谢产物和生殖性状的影响。从分娩到第80天，总共给23头初产的荷斯坦奶牛喂了三种不同的日粮，包括不同淀粉水平（以干物质为基础）。根据淀粉水平将母牛随机分为三组：低（低，LS，16％， n = 7），中（MS，20％，n = 8）和高（HS，24％，n = 8）。每天记录牛奶产量，每周测定身体状况评分（BCS）。经直肠超声检查，每周采集血样三次，以确定其生殖特性和血液代谢产物。尽管LS组的产奶量高于其他组，但BCS和血液代谢物在各组之间没有差异。两组之间的产后卵泡形态，第一次排卵时间和内卷过程没有差异。另外，HS组的排卵期卵泡和黄体大小以及诱发发情后的孕酮水平在数值上高于其他组。因此，淀粉水平对产后生殖特性没有影响。

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