The effects of dietary ratio of non-fiber carbohydrates to neutral detergent fiber (NFC/NDF) on methane and carbon dioxide emissions in dairy goats were studied in this trial. Nine healthy late-lactating dairy goats with similar body weight, lactation stage, parity and milk yield were randomly divided into 3 groups with 3 goats in each group, which were fed experimental diets with 1.02, 1.24 and 2.58 NFC/NDF, respectively. Methane and carbon dioxide emissions were measured using Sable respiratory measurement system. The results showed as follows: 1) the current gas chromatogram was substituted by Sable respiration measurement system which could be adapted to monitor concentrations of methane and carbon dioxide at real time, even show the more exactly releasing characteristic of methane and carbon dioxide about ruminant from indoor-fed livestock. 2) Methane daily emission was increased with the increase of dry matter intake, but was decreased with the increase of dietary NFC/NDF; carbon dioxide daily emission was increased with the increase of dietary NFC/NDF. 3) Methane emission showed a peak after 3 to 4 hours of feeding under different NFC/NDF, after 22:00, methane emission remained a relatively low concentration until the next feeding in the next day. In conclusion, dietary NFC/NDF significantly affects the emissions of methane and carbon dioxide in dairy goats.
MA Yanfen
,
YANG Shuqing
,
XUE Ruiting
,
HU Honglian
,
DU Ruiping
,
NIU Wenyi
,
GAO Min
. Effects of Dietary Ratio of Non-Fiber Carbohydrates to Neutral Detergent Fiber on Emissions of Methane and Carbon Dioxide in Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2013
, 25(5)
: 996
-1003
.
DOI: 10.3969/j.issn.1006-267x.2013.05.014
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