Effect of breed and pasture type on methane emissions from weaned lambs offered fresh forage.

While total daily CH 4 emissions were higher for the TexX lambs compared with the WM lambs, the yield of CH 4 per unit of forage consumed was similar for the two breed types, as was the yield per unit MLW. Pasture type had a highly significant effect on daily CH 4 emissions ( Table 2 ), in turn influencing the EFs estimated using the Tier 1 approach (Dong et al. 2006 ).

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