(Enteric methane) greenhouse gas emissions in cows are cut 25% with feed supplement (3-NOP)

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The addition of 3-Nitrooxypropanol to the feed of dairy cows reduced their enteric methane emissions by about 25% in a recently published study—one in a series of Penn State studies of the investigational substance in the United States—which might be an early step toward it being approved for use in this country.

‘Often referred to as 3-NOP, the compound inhibits an enzyme that is crucial to the final stage of methane synthesis in a cow’s rumen. When 3-NOP is fed to cattle, their methane production is inhibited, explained researcher Alex Hristov, distinguished professor of dairy nutrition, College of Agricultural Sciences. . . .

‘Compared with the control group, cows ingesting 3-NOP decreased their daily methane emissions by 26%, methane yield by 21% and methane emission intensity by 25%. Significantly, the investigational substance did not affect lactational performance of the cows and in fact increased their feed efficiency per unit of…

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