Journalartikel

Jahr der Veröffentlichung: 1998

Seiten: 237-244

Zeitschrift: Agribiological research : Zeitschrift für Agrarbiologie - Agrikulturchemie - Ökologie

Bandnummer: 51

Heftnummer: 3

ISSN: 0938-0337

Verlag: VDLUFA-Verl.

Abstract: 
The present study was performed to investigate the effect of feeding diets with various amounts of sunflower seed on performance in laying hens and fatty acid composition of egg yolk lipids. Therefore, an experiment was carried out with 72 hens which were assigned to six groups and were fed either a control diet based predominately on soybean meal as source of protein, or a control diet in which soybean meal was partially replaced by sunflower expeller, ol diets with 10 %, 20 %, 25 % or 30 % of sunflower seed. All the diets were formulated to be isocaloric (11.5 MJ MEN-corr. per kg) and isonitrogenic (17.5 % crude protein).Dietary levels of sunflower seed up to 30 % did not influence feed consumption, egg weight, egg production, daily produced egg mass, feed expense per kg egg mass, and concentrations of lipids in egg yolk. Therefore, the study suggests that sunflower seed can be included in high amounts into rations for laying hens without adverse effects on laying performance. Parameters of laying performance were also not different between the two control groups, with the exception of feed expense per kg egg mass which was increased in the group fed the diet with sunflower expeller. This suggests that sunflower expeller can be used as a source of protein in rations for laying hens.The fatty acid composition of egg yolk lipids was markedly influenced by sunflower seed. Feeding sunflower seed elevated the level of linoleic acid in a dose-dependent way, mainly at the expense of monounsaturated fatty acids. The levels of n-3 polyunsaturated fatty acids were reduced by feeding sunflower seed. As a consequence of chose alterations, the P/S ratio and the ratio between n-6 and n-3 polyunsaturated fatty acids were markedly raised by sunflower seed. The effects of sunflower seed on the fatty acid composition of egg yolk lipids an discussed with regard to implications for human nutrition.

Harvard-Zitierstil: Roth-Maier, D., Eder, K. and Kirchgeßner, M. (1998) The effects of various levels of dietary sunflower seed on performance of laying hens and fatty acid composition of egg yolk lipids, Agribiological research : Zeitschrift für Agrarbiologie - Agrikulturchemie - Ökologie, 51(3), pp. 237-244

APA-Zitierstil: Roth-Maier, D., Eder, K., & Kirchgeßner, M. (1998). The effects of various levels of dietary sunflower seed on performance of laying hens and fatty acid composition of egg yolk lipids. Agribiological research : Zeitschrift für Agrarbiologie - Agrikulturchemie - Ökologie. 51(3), 237-244.