Abstract

The objective of this study was to evaluate the effect of five different supplementations [Yeast-Saccharomyces cerevisiae (YS), tea leaves-Camellia sinensis (TL), Red Sorghum (RS), soybean oil (SBO) and Chinese soapberry - Sapindus mukorossi (CS)] on the reduction of methane (CH₄) in vitro conditions. Tests were done by adding each of the 5 supplementations (0.005 g X10¹⁰ for YS; 5 g for TL, RS and CS; and 5 mL for SBO) to the ruminal liquor (1.5 L/digester) of a cow fed Total Mixed Ration and incubated for 24 h. Results show that all the supplementations significantly decreased CH₄ concentration compared to the control treatment (p<0.05). In vitro CH₄ concentration was reduced from 56.75 to 11.14, 13.32, 19.88, 20.07%, respectively and 30.52% for SBO, TL, RS, CS and YS, respectively. CH₄ concentration tended to be higher during the first hours of incubation in the control treatment compared to all supplementations. However, the supplementations reduced CH4 concentration during the first part of the incubation. This demonstrates that the supplementations used in this experiment are very effective to reduce CH₄ concentration as early as 2 h after supplemented. Nevertheless, no significant interactions between treatments

Keywords:

Dairy cow (bos taurus), greenhouse gas, global warming, soybean oil, tea (camellia sinensis),

References

Competing interests

The authors have no competing interests.

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The authors have no competing interests.