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. 2015 Jul 30;112(34):10663–10668. doi: 10.1073/pnas.1504124112

Fig. 2.

Fig. 2.

Hydrogen emission of dairy cows treated with 3-nitrooxypropanol (3NOP). Control = 0 mg/kg of 3NOP, Low3NOP = 40 mg/kg of 3NOP, Medium3NOP = 60 mg/kg 3NOP, and High3NOP = 80 mg/kg 3NOP (dietary dry matter basis). Hydrogen emission was measured using the GreenFeed system (C-Lock, Inc.). Data are treatment means and bars represent SE; n = 12 (number of independent data points for each mean value). Where not visible, error bars are smaller than the symbols. Hydrogen data were not collected during the covariate period for all treatments and during experimental week 2 for the control cows.