文献类型: 外文期刊
作者: Zou, Caixia;Yang, Bingzhuang;Liang, Xianwei;Yang, Chengjian;Huang, Yali;Xia, Zhongsehng;Lu, Tianshui
作者机构:
关键词: Cysteamine hydrochloride;Methane emission;Water buffalo;In vitro fermentations
期刊名称: BUFFALO BULLETIN
ISSN: 0125-6726
年卷期: 2013 年 32 卷
页码:
收录情况: SCI
摘要: Cysteamine (beta-mercapto-ethylamine) has been used as a cystine depleting agent under its hydrochloride formulation for more than 20 years. In our previous studies, supplement Cysteamine hydrochloride (CSH) could increase the Conjugated linoleic acids content in water buffalo milk, but we do not know whether CSH could reduce the methane production. Thus, the aim of this present study was to evaluate the effect of Cysteamine hydrochloride (CSH) on in vitro methane emission in water buffalo. In vitro fermentations were conducted in 180-ml serum bottles as described by Theodorou et al (1994). CSH were supplemented at levels of 0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0% based on the concentrate (DM basis). The oven-dried substrate was comprised mainly by maize grain (25%), soybean meal (7.5%), elephant grass (26.3%), distiller's malt brewers (22.5%) and cassava pulps (18.75%), the concentrate to forage ratio was 32.5:67.5. The incubation time was 72 h, methane production was measured at 6 h, 12 h, 24 h incubation time. After 24 h incubation, rumen fluid was used to measure NH3-N concentration and VFA composition. Methane production at 6 h, 12 h, 24 h and butyrate at 24 h were decreased by supplementation of CSH, especially the CSH levels higher than 0.4%, while butyrate increased significantly (P<0.05). There were no significant difference existed in total gas production (GP), GP from soluble fraction, GP from insoluble fraction, Potential GP and GP rate constant (h(-1)), final NH3-N concentration, acetate, propionate in each group (P>0.05). Therefore, supplementation of CSH at 0.4% level could decrease the in vitro rumen methane production, while has no significant effects on other fermentation parameters. We can conclude that CSH would be a potential methane inhibitor, but its functional mechanisms need to be further researched.
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