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Investigations on the effects of Ca‐soap of linseed oil on rumen fermentation in sheep and on milk composition of goats
Author(s) -
Cenkvári É.,
Fekete S.,
Fébel H.,
Veresegyházi T.,
Andrásofszky E.
Publication year - 2005
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/j.1439-0396.2005.00538.x
Subject(s) - rumen , hay , linseed oil , digestion (alchemy) , dry matter , composition (language) , fermentation , food science , zoology , straw , chemistry , neutral detergent fiber , fodder , biology , agronomy , chromatography , linguistics , philosophy
Summary Six rumen‐cannulated wethers were fed by a diet composed of alfalfa hay and concentrate and supplemented by 75 g Ca‐soap of linseed oil (5.4% in dry matter, DM) daily. A model trial was performed to detect the effects of the Ca‐soap on rumen fermentation parameters and on fibre digestion. Approximately 3 h after feeding Ca‐soap, ratio of C2:C3 decreased (from 4.33 to 4.02) and the production of i‐ and n‐butyrate and i‐ and n‐valeriate increased by 28, 5.3, 11.76% and 6.80% respectively. Total volatile fatty acid concentration in rumen fluid did not change (126.1 vs. 126.4 m m ) as a result of Ca‐soap supplementation. The in vitro trial showed no detrimental influence of Ca‐soap on the acid detergent fibre (ADF) degradation. Using feed samples containing Ca‐soap to be incubated in tubes, ADF digestion proved to be significantly higher (p < 0.001). Approximately 14 goats (Saanen breed, 30–70 days in lactation) were used to test the effects of Ca‐soap on milk composition. Their ration contained alfalfa hay, millet straw and a concentrate. In the experimental group (seven goats) the diet was supplemented with Ca‐soap of linseed oil (75 g/animal/day). The milk composition was changed (slightly reduced solid content, sometimes significantly reduced milk fat contents), when Ca‐soap was included in the diet of lactating goats.