Milk Yield and Blood Metabolite Profile in Late Pregnancy in Lori Ewes Receiving Diets Containing Undegradable Protein Sources

Subject Areas : Camel

ر. کوشکی ¹ , ح. منصوری یاراحمدی ² , م. خالداری ³ , ج. فخرائی ⁴ , ک. کرکودی ⁵

1 - Department of Animal Science, Arak Branch, Islamic Azad University, Arak, Iran
2 - Department of Animal Science, Arak Branch, Islamic Azad University, Arak, Iran
3 - Department of Animal Science, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
4 - Department of Animal Science, Arak Branch, Islamic Azad University, Arak, Iran
5 - Department of Animal Science, Islamic Azad University, Saveh Branch, Saveh, Iran

Received: 2019-05-25 Accepted : 2019-08-31 Published : 2019-12-01

Keywords: reproductive performance, fish meal, late pregnancy, Lori ewes, colostrum, extruded soybean,

Abstract :

An experiment was conducted to investigate the effects of supplementing Lori ewes with rumen-undegradable protein (RUP) in late pregnancy on their performance and that of their lambs. Milk yield and blood metabolite profile were measured. Forty pregnant ewes were used in a completely randomized design trial with four treatments: 1) a basal diet (control); 2) with a supplement of 5% fishmeal; 3) with a supplement of 5% extruded soybean and 4) with a supplement combining both sources. Supplementation started 30-days before the estimated parturition date. Dietary inclusion of fish meal significantly improved body weight at lambing compared to the other groups (P<0.05). Lambs of ewes fed diets supplemented with rumen undegradable protein (RUP) were heavier at birth and weaning compared to other groups (P<0.05). Soybeans, of the combined supplement improved the colostrum concentration of IgG in postpartum ewes (P<0.05). Diets containing extruded soybeans resulted in milk with higher milk urea nitrogen content than the control diet (P<0.05). Serum concentration of glucose was significantly decreased in ewes fed diets containing RUP pre-partum (P<0.05), while post-partum glucose concentration was only decreased in ewes fed diets containing fish meal without or with extruded soybeans (P<0.05). Plasma concentration of beta-hydroxybutyric acid (BHBA) and non-esterified fatty acid (NEFA) were significantly decreased in the treated groups compared to the control group in post-partum ewes (P<0.05).

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