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   effects of flaxseed-rich diet on reproductive performance in estrous-synchronized baluchi ewes  
   
نویسنده didarkhah m. ,vatandoost m. ,dirandeh e. ,dadashpour davachi navid
منبع archives of razi institute - 2020 - دوره : 75 - شماره : 3 - صفحه:397 -404
چکیده    The purpose of this study was to compare the effects of using different levels of flaxseed in diets on the reproductive performance of estrous-synchronized baluchi ewes (para 3). diets contained either basal diet (control) or different levels of extruded flaxseed (2%, 5%, 7%, 10%, and 12%) and were fed from lambing to 60 days after lambing. the ewe estrus cycles were synchronized using controlled internal drug release (cidr) for 14 days starting from day 16 of fat supplementation. the rams were introduced 24 h after cidr removal. the ewes fed control diets had the highest mean dry matter intake (1,800±35 g) which was declined with the increase of flaxseed levels. the experimental diets exerted no effects of urea concentration in blood plasma. however, plasma glucose concentration was lower (p<0.05) in the ewes fed the control diet and 2% flaxseed, compared to those in other groups. nonetheless, there was no difference among the ewes fed 5%, 7%, 10%, and 12% flaxseed in terms of plasma glucose concentrations (p<0.05). the ewes fed 2% flaxseed had the highest level of plasma triglyceride concentration among other groups. in addition, the control group had the lowest level of plasma total cholesterol and low-density lipoproteins concentration in comparison to other groups (p<0.05). however, plasma nonesterified fatty acids and β-hydroxybutyrate concentrations were similar among the groups (p>0.05). the mean interval between cidr removal and the exhibition of estrus ranged from 30 to 40 h with the shortest interval being recorded in the ewes fed 12% flaxseed (p<0.05). the control group had the lowest number of follicles on estrus day among other groups (p<0.05). furthermore, the ewes fed 10% and 12% flaxseed had the highest ovulation, pregnancy, and lambing rates, compared to other groups (p<0.05). in conclusion, the findings revealed that feeding the ewes with 10% and 12% flaxseed resulted in the improvement of reproductive performance.
کلیدواژه flaxseed ,ovulation ,reproduction ,sheep ,ultrasonography
آدرس university of birjand, faculty of agriculture, iran, payame noor university, department of agriculture, iran, sari agricultural sciences and natural resources university, department of animal science, iran, agricultural research, education and extension organization (areeo), razi vaccine and serum research institute, department of research, breeding and production of laboratory animals, iran
پست الکترونیکی navid.d.davachi@gmail.com
 
   تاثیر جیره‌های دارای دانه کتان بر عملکرد تولیدمثلی میش‌های بلوچی با فحلی همزمان شده  
   
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Abstract    هدف از پژوهش حاضر مقایسه تأثیر جیره­هایی دارای مقادیر متفاوت دانه کتان بر عملکرد تولیدمثلی میش­های بلوچی سه الی چهار ساله­ی دارای فحلی همزمان شده در نزدیک زایمان بود. بره­ها بلافاصله پس از تولد از مادر جدا شدند و آزمایش تا 60 روز ادامه یافت. جیره های آزمایشی شامل: تیمار A: بدون دانه کتان، تیمار B: شامل 2 درصد دانه کتان، تیمارC : شامل 5 درصد دانه کتان، تیمار D: شامل 7 درصد دانه کتان، تیمار E: شامل 10 درصد دانه کتان، تیمار F: شامل 12 درصد دانه کتان. نتایج حاصل از این آزمایش نشان داد که مصرف ماده خشک در میش­هایی که از جیره بدون دانه کتان تغذیه کردند کمتر بود(05/0>P ). بیشترین میانگین وزن بدن میش­ها درجیره بدون دانه کتان و کمترین مربوط به جیره با 5 درصد دانه کتان (2/55 کیلوگرم در مقابل 4/46 کیلوگرم) بود. نرخ فحل­یابی تفاوتی بین جیره­های آزمایشی نداشت (05/0<P). درصد تخمک­ریزی، درصد آبستنی و درصد دوقلوزایی در جیره­های با 10 و 12 درصد  دانه کتان بیشتر از سایر گروه­ها بود (05/0>P ).
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