The Effect of Extruded Flaxseed and Conjugated Linoleic Acid on Milk Production and Composition, Blood Metabolites and Ovarian Activity in Ghezel Ewes During Postpartum period

Mazareei, Samad (2018) The Effect of Extruded Flaxseed and Conjugated Linoleic Acid on Milk Production and Composition, Blood Metabolites and Ovarian Activity in Ghezel Ewes During Postpartum period. Masters thesis, University of Mohaghegh Ardabili.

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Text (تأثیر استفاده از دانه کتان اکسترود شده و اسید لینولئیک مزدوج بر تولید و ترکیب شیر، متابولیت-های خونی و فعالیت تخمدانی در میش‌های قزل در دوره پس از زایش) Samad Mazareei.pdf Download (887kB) | Preview

Abstract

The aim of this study was to evaluate the effects of using different fat supplementations on milk production and composition, blood metabolites and ovarian activity in Ghezel ewes during postpartum period. 24 fresh Ghezel ewes in 4 treatment groups with 6 replicate in each treatment were studied for 60 days postpartum. Treatments groups included: control, 10 % extruded Flaxseed, 20 gr conjugated linoleic acid (CLA) and 10 % extruded Flaxseed with 20 gr CLA. Studied milk composition included: Fat, Protein, Lactose and total solids. The composition of milk was determined by Milcoscan. The determination of fatty acid profiles was done by gas chromatography. Blood samples were collected from caudal vein in the middle and at the end of the experiment. The studied blood parameters of Glucose, Triglycerides, cholesterol, HDL, Albumin, Total protein, BUN and serum urea were determined by commercial kite and spectrophotometer. The follicles and ovarian activity of the ewes were performed by ultrasound and rectal. Statistical analysis of the data was performed using SAS statistical software. Comparing the results in the middle of the study showed that the milk production and percentage of milk fat in flaxseed + CLA treatment were higher than other treatment groups. In addition, control treatment had the best performance for lactose. The amount of protein and total solids content in flaxseed treatment was highest. The results at the end of experiment showed that the highest production and all milk compounds were related to the flaxseed + CLA treatment. Comparing the results of measuring the fatty acids of milk showed that the highest levels of long chain fatty acids and CLA isomer were observed in CLA + flaxseed treatment. Control treatment had the highest level of short chain fatty acids. Comparing the results in the middle of the study showed that the blood glucose, total cholesterol, total protein and HDL levels were higher in extruded flaxseed recipients compared to other treatment groups. In addition, CLA treatment had the best performance for BUN and urea, and the highest concentration of triglyceride and albumin was in flaxseed + CLA treatment. The results of the end of the study showed that the highest concentration of glucose, cholesterol, HDL, albumin and total protein was in extruded flaxseed treatment. The highest concentration of triglyceride was observed in CLA treatment. The amount of BUN and urea in the control group was highest. The results of follicles and ovarian activity showed that CLA treatment had a significant increase in the number of large follicles, the corpus luteum and the total number of follicles. The lowest amount was related to the median follicle, large follicle, and corpus luteum associated with the control treatment. The control treatment also had the highest amount of small follicles. Experimental treatments did not show significant changes in the size of small and medium follicles. As a generalized conclusion, it can be said that the simultaneous use of extruded flaxseed and CLA has a better effect on the production, composition and fatty acids of milk. . The simultaneous use of extruded flax and CLA increases the amount of unsaturated fatty acids and conjugated linoleic acid in milk that is beneficial for human health. By using CLA supplementation in ewe's diet, the number, size and quality of follicles as well as the quality of ovums can be increased and, as a result, improve ovarian activity and reproduction, which today is one of the goals of all livestock breeders and animal Science, experts.

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