The nutritive value of the residues remaining after oil extraction from seeds of evening primrose ( Oenothera biennis L)

An experiment was carried out on 30 Black-and-White Lowland bulls fattened from 165 to 485 kg BW, divided into three groups fed diets without evening primrose oil cake (control group C) or with a contribution of 10 (group PI) or 30% (group P2) of evening primrose cake. Bull performance, nutrient digestibility, nitrogen balance, ammonia and volatile fatty acids in the rumen fluid, physicochemical properties of meat and subcutaneous and kidney fat composition were estimated. Average daily body gain was 1333 g in group PI; 1235 g in P2; and 1216 g in C. The content of oleic (C 18 .,) and linoleic (C, 8 . 2n6 ) acid in subcutaneous and kidney fat was higher in bulls fed diets with evening primrose oil cake than in controls.

Section: Discussionmentioning

confidence: 99%

Performance and body fat composition of fattening bulls fed diets with evening primrose (Oenothera paradoxa) oil cake

Strzetelski¹,

Krawczyk²,

Kowalczyk³

et al. 1998

“…In their study on the efficiency of protein extraction from evening primrose cake, Szymczak and Drzewicka (1992) found that such protein had a low solubility, limited digestibility and availability. Studies of Hanczakowski and Szymczyk (1993) on rats confirm the limited digestibility of evening primrose cake protein.…”

Section: Discussionmentioning

confidence: 71%

“…Szymczak and Drzewicka (1992) and Hanczakowski and Szymczyk (1993) also found that the content of ether extract in DM of primrose cake is variable and ranges from 6.1 to 17.0%. The differing ether extract content in various batches of evening primrose cake found in our laboraty (8.6 and 13.9% in DM) suggests that parameters of pressing were different for batches.…”

Section: Discussionmentioning

confidence: 99%

“…In an experiment on rats Hanczakowski and Szymczyk (1993) found only limited suitability of this product as a feed for monogastric animals because of the low protein digestibility due to antinutritional factors present in it. Dixon and Hosking (1992) reported that rumen fermentation could modify antinutritional compounds to less harmful compounds for ruminants.…”

Section: Introductionmentioning

confidence: 99%

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Nutritive value of evening primrose (Oenothera paradoxa) cake for ruminants

Stasiniewicz

Niwińska²,

Strzetelski³

et al. 1998

The nutritive value of evening primrose (Oenothera paradoxa) oil cake was estimated from chemical composition and nutrient digestibility. The cake contained on average (per kg): 210 g crude protein, 0.55 UFL, 0.44 UFV, 110 PDI (PDIE -PDIN = -22 g), 92 g PDIA and 100 g of ether extract. The proportion of methionine and cystine in cake was relatively high (1.97 and 2.17 g/16 g N) but that of lysine was rather low (2.00 g/16 g N). Linoleic (C 18 . 2n6 ) -73.1%, y-linolenic (C 18 . 3n6 ) -9,0% and oleic (C 181 n9 ) -6.4% acids dominated in total fatty acid content. Rumen degradability and intestinal digestion coefficients of protein of evening primrose oil cake or seeds were 0.39 and 0.65, respectively.

“…There is rather a small chance that the fat of evening primrose oil cake or full fat seeds inhibited microbial protein synthesis in the rumen, as the contribution of this fat in the diet was low. Hanczakowski and Szymczyk (1993) reported that evening primrose seeds and oil cake contain relatively high levels of tannins forming complexes with protein.…”

Section: Discussionmentioning

confidence: 99%

Milk yield and composition in dairy cows fed a diet with evening primrose (Oenothera paradoxa) full fat seeds or oil cake

Strzetelski¹,

Kowalczyk²,

Stasiniewicz³

et al. 1999

The experiment was carried out on 30 Black-and-White Lowland dairy cows divided into 3 groups of 10 to investigate the effect of feeding evening primrose {Oenothera paradoxa) full fat seeds or oil cake on milk yield and composition. The animals were fed a basic ration consisting of maize silage, sugar beet top silage, meadow hay or green pasture forage (in summer) and concentrate mixture (control group -C) supplemented with evening primrose oil cake (group -O) or full fat seeds (group -S) from the beginning to 100th day of lactation. Average daily milk production was 31.4, 32.1 and 33.2 kg in the C, S and O groups, respectively, but differences between the groups were statistically insignificant. The fat content in milk from cows receiving oil cake (3.88 %) or full fat seeds (3.93 %) with their ration tended to be higher than in the control group (3.78 %) but the level of protein and lactose in milk was similar in all groups.