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- W3013787866 abstract "Abstract The relationship between feed intake at production levels and enteric CH 4 production in ruminants consuming forage-based diets is well described and considered to be strongly linear. Unlike temperate grazing systems, the intake of ruminants in rain-fed tropical systems is typically below maintenance requirements for part of the year (dry seasons). The relationship between CH 4 production and feed intake in animals fed well below maintenance is unexplored, but changes in key digestive parameters in animals fed at low levels suggest that this relationship may be altered. We conducted a study using Boran yearling steers ( n 12; live weight: 162·3 kg) in a 4 × 4 Latin square design to assess the effect of moderate to severe undernutrition on apparent digestibility, rumen turnover and enteric CH 4 production of cattle consuming a tropical forage diet. We concluded that while production of CH 4 decreased (1133·3–65·0 g CH 4 /d; P < 0·0001), over the range of feeding from about 1·0 to 0·4 maintenance energy requirement, both CH 4 yield (29·0−31·2 g CH 4 /kg DM intake; P < 0·001) and CH 4 conversion factor ( Y m 9·1–10·1 MJ CH 4 /MJ gross energy intake; P < 0·01) increased as intake fell and postulate that this may be attributable to changes in nutrient partitioning. We suggest there is a case for revising emission factors of ruminants where there are seasonal nutritional deficits and both environmental and financial benefits for improved feeding of animals under nutritional stress." @default.
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- W3013787866 date "2020-03-25" @default.
- W3013787866 modified "2023-10-07" @default.
- W3013787866 title "Severe below-maintenance feed intake increases methane yield from enteric fermentation in cattle" @default.
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- W3013787866 doi "https://doi.org/10.1017/s0007114519003350" @default.
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