Effects of Forage Type and Dietary Concentrate to Forage Ratio on Methane Emissions and Rumen Fermentation Characteristics of Dairy Cows in China

dc.contributor.author Na, Renhua
dc.contributor.author Dong, Hongming
dc.contributor.author Xin, Hongwei
dc.contributor.author Zhu, Zhiping
dc.contributor.author Chen, Yongxing
dc.contributor.author Xin, Hongwei
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T13:43:07.000
dc.date.accessioned 2020-06-29T22:39:21Z
dc.date.available 2020-06-29T22:39:21Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2013
dc.date.embargo 2013-08-28
dc.date.issued 2013-01-01
dc.description.abstract <p>This study was conducted to evaluate the effects of dietary forage type and concentrate-to-forage ratio (CTFR) on CH<sub>4</sub> emissions from dairy cows in China using the SF<sub>6</sub> tracer method. Rumen fluid concentrations of NH<sub>4</sub>-N and VFA, rumen fluid pH, and daily milk yield were measured as well. The dietary regimens included: corn stalks (dry corn stalks after corn harvest) as the forage source at CTFR of 40:60 (ration A), corn silage as the forage source at CTFR of 40:60 (ration B), and corn silage as the forage source at CTFR of 60:40 (ration C). Twelve dairy cows (body weight = 525 ±12 kg, mean ±SE) were divided into three groups of four animals each, balanced in age and body weight, and randomly allocated to the dietary treatments. The study was run for 25 days, with the first 15 days used for adjustment and the subsequent 10 days used for response measurement. The dietary treatments ranked ration A > ration B > ration C for CH<sub>4</sub>emissions quantity (L d<sup>-1</sup> head<sup>-1</sup>), rumen fluid pH, acetic acid concentration, and ratio of acetic acid and propionic acid concentration. For example, CH<sub>4</sub> emissions (mean ±SE) for rations A, B, and C were 353 ±13.4, 283 ±7.48, and 263 ±9.04 L d<sup>-1</sup> head<sup>-1</sup>, respectively, or 335 ±12.75, 270 ±7.12, and 250 ±8.6 L d<sup>-1</sup> AU<sup>-1</sup> (AU = 500 kg live weight). On the other hand, the treatments ranked ration A < ration B < ration C for concentrations of NH<sub>3</sub>-N, propionic acid, and butyric acid in the rumen fluid. This study indicates that CH<sub>4</sub> emissions intensity from dairy cows (g kg<sup>-1</sup> milk output) can be significantly reduced by using corn silage as a forage source and by increasing the content of concentrates in the ration. Compared with rations B and C, ration A increased CH<sub>4</sub> emissions by 25% and 34% (p < 0.01), respectively. A full assessment of the effectiveness of such an improved feeding management, through life cycle analysis, in reducing carbon footprint would be warranted in future studies.</p>
dc.description.comments <p>This article is from <em>Transactions of the ASABE</em> 56, no. 3 (2013): 1115–1122, doi:<a href="http://dx.doi.org/10.13031/trans.56.9972" target="_blank">10.13031/trans.56.9972</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/380/
dc.identifier.articleid 1659
dc.identifier.contextkey 4518854
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/380
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1140
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/380/2013_NaR_EffectsForageType.pdf|||Fri Jan 14 23:52:46 UTC 2022
dc.source.uri 10.13031/trans.56.9972
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords concentrate-to-forage ratio
dc.subject.keywords dairy cows
dc.subject.keywords enteric fermentation
dc.subject.keywords methane emissions
dc.subject.keywords SF6 tracer method
dc.title Effects of Forage Type and Dietary Concentrate to Forage Ratio on Methane Emissions and Rumen Fermentation Characteristics of Dairy Cows in China
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 36e0a8ce-fa2e-4df4-9f67-8d1717122650
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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