www.scholarsresearchlibrary.com t Available online a Scholars Research Library Archives of Applied Science Research, 2016, 8 (7):22-26 (http://scholarsresearchlibrary.com/archive.html) ISSN 0975-508X CODEN (USA) AASRC9 22 Scholars Research Library Effect of the ratio of incorporation of the date wastes at the end of gestation on the blood biochemical parameters in Oueld Djellal ewes Djaalab I. 1 , Bouaziz O. 1 , Lakhdara N. 1 , Djaalab H. 1 , Haffaf S. 2 and Allaoui A. 2 1 Laboratoire Gestion de la Santé et Productions Animales. Institut des sciences vétérinaires. Université des frères Mentouri Constantine. Algérie 2 Laboratoire Environnement Santé et Productions Animales. Institut des sciences vétérinaires et agronomiques. Université Hadj Lakhdar Batna. Algérie _____________________________________________________________________________________________ ABSTRACT The increase of the nutritive needs in ewes at the end of pregnancy, period where the feeding has a determinant action on the strength of lambs and on the preparation of ewes to lactating, emposes a food complementation particularly on extensive system. In order to determinate the effect of supplementation of date wastes on the variation of energetic and nitrogenic metabolism parameters, 45 pregnant ewes were distributed randomly in three groups; two experimental groups (25%R et 50%R) received during the last two months of pregnancy, a complementation after grazing based mainly on date wastes whereas the control group (0%R) does not receive any complementation. During the incorporation of date wastes at 25% mixed with concentrate, the females showed high plasmatic level of cholesterol (p<0.001) and triglycerides (p<0.001) and a low level of glucose (p<0.001) comparatively to the group 50%R and to the control group 0%R that did not vary significantly. However, the low plasmatic levels of total proteins (p<0.0001), of albumin (p<0.001) and of urea (p<0.01) were observed in females receiving a complementation of 50%. The date wastes remain protein’s deficient, which could be corrected by a simple protein intake making them interesting in their incorporation in animals feed. The replacement of date wastes to concentrate classically used would be of an economical interest. Keywords: End of gestation, ewes, date wastes, biochemical parameters, and incorporation rate. _____________________________________________________________________________________________ INTRODUCTION In the arid and semi-arid zones where the dry periods are long and the rainfall is low, the food intake is generally deficient in digestible energy and in proteins [1]. The end of gestation is one of the key periods of the ewe cycle, where feeding has a determinant action by conditionning the lamb weights at birth as well as milk yield of ewes. The recourse to complementation based on barley, cereal, is used in animal feeding. This main food composing concentrate food is almost imported from Europe and America with a large amount of foreign currency, which could penalize the production systems of ovine based on barley. The date palm production in Maghreb is dominated by Algeria with a production of 470 000 tones, followed by Tunisia with 125 000 tones and finally by Morocco with 69 400 tones [2]. The date wastes, results of sorting after harvesting, are dates of bad quality, of low value, improper of human consumption either due to their low gustative quality, or because to their hard texture [3]. They could be valorized, by their incorporation in the animals food rations [4].