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Methane emission from nitrate-treated tannin rich feed for cattle in Vietnam


In developing countries such as Vietnam the population consumes more animal products for example milk and meat than before which requires greater livestock production. Ruminants contributes to more methane emission which creates a dilemma between food production and its environmental impact. By feeding ruminants with nutritive crops which humans can not assimilate the animal performance will increase in terms of better growth and milk production without inpinging on food that can be consumed directly by humans. Increasing animal performance reduces methane emission in terms of amount of methane in kg-1 milk and meat which today is much greater in developing countries than developed countries. The aim of the study was to investigate tropical tannin-rich legumes for their potential as a feed supplement for ruminants made in vitro. Tannin-rich legumes binds protein in the rumen, which increase the proportion of bypass protein in the feed, and reduces enteric methane emission. Addition of nitrate further reduces methane emission and available nitrogen increases. Four legumes; Acacia mangium, Flemingia macrophylla, Leucaena leucocephala and Stylosanthes guianensis was studied together with a well-studied tannin-rich euphorbiaceae; Manihot esculenta Crantz (Cassava) as a reference. Four different drying methods were used; sundried, dried in heat, freeze-dried and dried in room temperature. Freeze-drying showed significantly (P

Författare

Sofie Winding

Lärosäte och institution

SLU/Dept. of Animal Nutrition and Management

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