ارزیابی روزهای باز آبستنی و ارتباط آن با برخی مولفه‌های خون، شیر و غذا در گاوهای شیری نژاد هلشتاین

نوزاد, شهرام; رامین, علی قلی; عصری رضائی, سیامک

doi:10.22092/vj.2018.115445.1363

ارزیابی روزهای باز آبستنی و ارتباط آن با برخی مولفه‌های خون، شیر و غذا در گاوهای شیری نژاد هلشتاین

نوع مقاله : مقاله کامل

نویسندگان

¹ دانش آموخته PhD، دانشکده دامپزشکی دانشگاه ارومیه

² استادگروه علوم درمانگاهی، دانشکده دامپزشکی دانشگاه ارومیه

³ دانشیار گروه علوم درمانگاهی، دانشکده دامپزشکی دانشگاه ارومیه

10.22092/vj.2018.115445.1363

چکیده

روزهای باز آبستنی و ارتباط آن با شاخص‌های خون، شیر و غذا در گاوهای پرتولید جهت تعیین مولفه‌های تاثیرگذار در فحلی و آبستنی بررسی شد. همزمان با فحلی نمونه‌های خون، شیر و غذا بصورت ماهانه تا شروع آبستنی جمع‌آوری شدند. درصد فحلی‌ها از یک تا 6 فحلی به‌ترتیب 3/21، 2/26، 7/19، 10/13، 6/6 و 10/13 بودند. درصد گاوهای 2 تا 11 ماه آبستن به ترتیب 5/11، 3/21، 8/9، 6/1، 5/11، 8/9، 5/11، 3/3، 8/9 و 8/9 بودند. فراوانی فحلی‌ها و ماه‌های آبستنی معنی‌دار بودند. بیشترین گاوها در سه ماهگی آبستن شدند. میانگین آبستنی 180 روز بود. حدود 50% فحلی‌ها بدون تشخیص بودند. جهت تعیین ارتباط بین روزهای باز آبستنی با شاخص‌های مطالعه، روزهای باز آبستنی به کمتر و بیشتر از 120 روز تقسیم شدند. میانگین اوره، کراتینین، بتاهیدروکسی بوتیرات، فسفر، منیزیم، هماتوکریت، هموگلوبین و لکوسیت‌های خون در بین گاوها متفاوت بودند نتایج نشان داد که با افزایش پروتئین و کلسیم غذا، اوره، پروتئین و منیزیم خون و منیزیم شیر روزهای باز آبستنی افزایش ‌معناداری یافت. همچنین با افزایش هموگلوبین و فسفر خون، اوره، پروتین و فسفر شیر روزهای باز آبستنی کاهش معناداری ‌یافت. نتیجه اینکه روزهای باز آبستنی در گاوهای این مطالعه دو برابر حالت طبیعی بود. بیشترین عوامل تاثیرگذار در روزهای باز آبستنی شاخص‌های خون و شیر بودند. تغییرات پروتئین تام و ماکرومینرال‌ها و اوره از نشانگرهای برجسته در روزهای باز آبستنی گاو محسوب می‌گردند.

کلیدواژه‌ها

20.1001.1.24235407.1398.32.1.8.6

موضوعات

علوم بالینی دامپزشکی

عنوان مقاله [English]

Evaluation of the open days and its relationship with hematobiochemical, milk and diet parameters in dairy Holstein cattle

نویسندگان [English]

Sh. Nozad ¹
Ali-Gholi Ramin ²
Siamak Asri Rezaei ³

¹ Veterinary Graduated, Veterinary College, Urmia University, Urmia, Iran.

² Professor, Department of clinical Science, Veterinary college, Urmia University, Urmia, Iran.

³ Associate Professor, Department of clinical Science, Veterinary college, Urmia University, Urmia, Iran.

چکیده [English]

Pregnancy open days (POD) and its relationship with diet, blood and milk parameters was assessed in high producer dairy cows to determine the indices could be affect on pregnancy rate. Following the estruses recording feed, blood and milk samples were prepared monthly up to the date of pregnancy in dairy cows. The visible estruses was from one to 6 and were 21.3%, 26.2%, 19.7%, 18.1%, 6.6% and 13.1%, respectively. The POD were varied from 2 to 11 months and were 11.5%, 21/3%, 9.8%, 1.6%, 11.5%, 9.8%, 11.5%, 3.3%, 9.8% and 9.8%, respectively. The differences among visible estruses and POD were statistically significant. Most cows revealed pregnancy after 3 months of calving. The overall mean for POD were 6 months. Approximately 50% of estruses were latent and have not been recognized. Mean values of urea, protein, calcium, magnesium, and phosphorus in diet, blood and milk during the POD were statistically significant difference among the groups . To realize the relationships between POD and biochemical parameters, POD classified into >120 and

کلیدواژه‌ها [English]

Open days
Cattle
Blood
Milk
Diet

مراجع

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