Effect of a Corn Straw or Mixed Forage Diet on Endocrine, Metabolism and Lactation Performance in Periparturient Cows

文献类型： 外文期刊

第一作者： Qin, Tong

作者： Qin, Tong;Wang, Haoyu;Hao, Haisheng;Wang, Dong;Du, Weihua;Zhu, Huabin;Bu, Dengpan

作者机构：

关键词： Forage type;endocrine;metabolite;lactation performance;periparturient cows

期刊名称：JOURNAL OF ANIMAL AND VETERINARY ADVANCES （ 影响因子：0.365； 五年影响因子：0.359 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The objective of this study was to evaluate the effect of a corn straw or mixed forage diet on endocrine, metabolism and lactation performance in periparturient Holstein cows. Twelve multiparous, periparturient Holstein cows were randomly assigned totwo groups and fed a corn straw or mixed forage diet, respectively. The CS diet included 33.8% corn straw and the F:C ratio [Dry Matter (DM)] was 60:40. The MF diet included 3.7% Chinese wildrye, 28.4% alfalfa hay and 26.5% corn silage, the F:C ratio (DM) was 40:60. All cows were fed from weeks 3-8 and Body Weight (BW), Body Condition Score (BCS) and Dry Matter Intake (DMI) were recorded. Milk protein, fat, lactose and Somatic Cell Count (SCC) were determined twice weekly. Metabolite and hormone analyses of blood were made weekly. Results showed that dietary treatments had no detectable effects on BW, BCS, DMI and blood hormones measured. From the 6 weeks of lactation, cows fed MF diet produced more milk (p<0.05) and tended to produce more milk fat (p= 0.07) and protein (p = 0.10) compared with cows fed CS diet. The proportions of milk fat, protein and lactose (%) did not differ between the two dietary treatments (p>0.05). In addition, the milk SCC in the CS group was significantly higher (p = 0.02)than the MF group. Cows fed MF diet experienced more severe Negative Energy Balance (NEB) and had higher concentrations of (3-Hydroxy Butyric Acid (BHBA) and Non-Esterified Fatty Acid (NEFA) than cows fed CS diet. Collectively, these results suggest thatcows fed MF diet improve lactation performance of periparturient cows but this dietary treatment may have an adverse effect on NEB of periparturient cows.

分类号： S

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