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44. Nutritional value and physiological effects of soya-free diets fed to rats during growth and reproduction.

Author

Pastuszewska, B., Taciak, M., Ochtabińska, A., Tuśnio, A., Misztal, T., Romanowicz, K., and Morawski, A.

Subjects
*RATS, *SOYBEAN, *MILK, *EGGS, *REPRODUCTION
Abstract

The objective of the study was to assess the effects of substitution milk and egg for soya products in breeding diets for rats, with concomitant decrease of the dietary protein level and supplementation with amino acids. Soya-containing (S) and two soya-free (NS and NSA) diets were evaluated as protein and energy sources, and their effects on reproductive performance during two cycles, and on the quality of the offspring were assessed. Organ weights were registered in females and blood parameters were determined in males. In the offspring males from S and NS groups, plasma LH, testosterone and prolactin levels were measured on the 22nd and the 60th day of life. The S diet contained more protein of smaller concentration of methionine and cystine and lower biological value than both NS and NSA diets and promoted similar post-weaning growth rate, similar body weight changes of dams during gestation and lactation and slightly lower mating efficiency. Within each reproductive cycle, the number and individual and total body weight of newborn and weanling pups did not differ but in two cycles mean number of neonates per litter and mean litter weight were significantly lower on S than on NSA diet. Plasma concentration of hormones did not differ in 22-day-old offspring males while in the older ones LH and prolactin levels were higher in animals fed on S than on NS diet. It is concluded that replacing soya protein by milk and egg protein with concomitant lowering dietary protein level and amino acid supplementation does not impair the growth rate and tends to improve reproductive performance. Feeding soya-free vs. soya-containing diets differentiates hormonal status of young males. [ABSTRACT FROM AUTHOR]

Published
2008
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46. UTILISATION DE LA FÉVEROLE ENTIÈRE ET DÉCORTIQUÉE PAR LE PORC EN CROISSANCE : DIGESTIBILITÉ ET DISPONIBILITÉ DES ACIDES AMINÉS (1)

Author

PASTUSZEWSKA, B., H. DUÉE, P., Henry, Y., BOURDON, D., Jung, Julien, P. HAUTDUCŒUR, J., SEREZAT, Michèle, BLONDEL, Chantal, and Revues Inra, Import

Subjects
[SDV.SA.ZOO]Life Sciences [q-bio]/Agricultural sciences/Zootechny, [SDV.SA.ZOO] Life Sciences [q-bio]/Agricultural sciences/Zootechny, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1974

47. Utilisation de la feverole entiere ou decortiquee par le porc en croissance : digestibilite et disponibilite des acides amines

Author

PASTUSZEWSKA, B., Duee, P., Henry, Y., BOURDON, D., Jung, Jérémy, Laboratoire de physiologie de la nutrition, Institut National de la Recherche Agronomique (INRA), Station de recherches porcines, and ProdInra, Migration

Subjects
[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, [SDV.SA.SF] Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
1974

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