Comparative methane estimation from cattle based on total CO2 production using different techniques
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Comparative methane estimation from cattle based on total CO2 production using different techniques. / Haque, Md N.; Hansen, Hanne H.; Storm, Ida M.L.D.; Madsen, Jørgen.
In: Animal Nutrition, Vol. 3, No. 2, 2017, p. 175-179.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Comparative methane estimation from cattle based on total CO2 production using different techniques
AU - Haque, Md N.
AU - Hansen, Hanne H.
AU - Storm, Ida M.L.D.
AU - Madsen, Jørgen
PY - 2017
Y1 - 2017
N2 - The objective of this study was to compare the precision of CH4 estimates using calculated CO2 (HP) by the CO2 method (CO2T) and measured CO2 in the respiration chamber (CO2R). The CO2R and CO2T study was conducted as a 3 × 3 Latin square design where 3 Dexter heifers were allocated to metabolic cages for 3 periods. Each period consisted of 2 weeks of adaptation followed by 1 week of measurement with the CO2R and CO2T. The average body weight of the heifer was 226 ± 11 kg (means ± SD). They were fed a total mixed ration, twice daily, with 1 of 3 supplements: wheat (W), molasses (M), or molasses mixed with sodium bicarbonate (Mbic). The dry mater intake (DMI; kg/day) was significantly greater (P < 0.001) in the metabolic cage compared with that in the respiration chamber. The daily CH4 (L/day) emission was strongly correlated (r = 0.78) between CO2T and CO2R. The daily CH4 (L/kg DMI) emission by the CO2T was in the same magnitude as by the CO2R. The measured CO2 (L/day) production in the respiration chamber was not different (P = 0.39) from the calculated CO2 production using the CO2T. This result concludes a reasonable accuracy and precision of CH4 estimation by the CO2T compared with the CO2R.
AB - The objective of this study was to compare the precision of CH4 estimates using calculated CO2 (HP) by the CO2 method (CO2T) and measured CO2 in the respiration chamber (CO2R). The CO2R and CO2T study was conducted as a 3 × 3 Latin square design where 3 Dexter heifers were allocated to metabolic cages for 3 periods. Each period consisted of 2 weeks of adaptation followed by 1 week of measurement with the CO2R and CO2T. The average body weight of the heifer was 226 ± 11 kg (means ± SD). They were fed a total mixed ration, twice daily, with 1 of 3 supplements: wheat (W), molasses (M), or molasses mixed with sodium bicarbonate (Mbic). The dry mater intake (DMI; kg/day) was significantly greater (P < 0.001) in the metabolic cage compared with that in the respiration chamber. The daily CH4 (L/day) emission was strongly correlated (r = 0.78) between CO2T and CO2R. The daily CH4 (L/kg DMI) emission by the CO2T was in the same magnitude as by the CO2R. The measured CO2 (L/day) production in the respiration chamber was not different (P = 0.39) from the calculated CO2 production using the CO2T. This result concludes a reasonable accuracy and precision of CH4 estimation by the CO2T compared with the CO2R.
KW - Carbon dioxide
KW - Measurement
KW - Methane
KW - Precision
KW - Respiration chamber
U2 - 10.1016/j.aninu.2017.04.004
DO - 10.1016/j.aninu.2017.04.004
M3 - Journal article
C2 - 29767103
AN - SCOPUS:85024374664
VL - 3
SP - 175
EP - 179
JO - Animal Nutrition
JF - Animal Nutrition
SN - 2405-6545
IS - 2
ER -
ID: 192054896