Effects of corn straw or mixed forage diet on rumen fermentation parameters of lactating cows using a wireless data logger

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• 作者：Chunfu Qin ; Dengpan Bu ; Peng Sun ; Xiaowei Zhao ; Peihua Zhang and Jiaqi Wang
• 刊名：Animal Science Journal
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：88
• 期：2
• 页码：259-266
• 全文大小：264K
• ISSN：1740-0929

文摘

The objective of this study was to evaluate the effect of two different forage types on rumen fermentation parameters and profiles using a wireless data logger. Eight lactating cows were randomly assigned to one of two dietary treatments with a low forage diet with corn straw (CS) or a high forage diet with mixed forage (MF) as the forage source, respectively. Dietary physically effective neutral detergent fiber (peNDF) content was 11.3% greater in CS. Dry matter intake and milk fatty acid content decreased upon CS (P < 0.05). Ruminal pH, temperature and oxidation reduction potential (ORP) were monitored for 14 weeks. The CS group had significantly higher pH but lower temperature and ORP compared to MF (P < 0.01). With the CS diet regime, pH at the time before morning feeding, rumination and post-ingestion were significantly higher than those in the MF group (P < 0.05). However, times with the ruminal pH below 6.0 and 5.8 were significantly reduced (P < 0.05), whereas ruminal pH below 5.6 tended to be lower (P = 0.07). The results indicated that rumen fermentation parameters were affected by forage types and dietary peNDF content might be predominant in ruminal pH regulation.