تقييم الوضع التناسلي والصحي عند أبقار الفريزيان لبعض المباقر في سورية

الموضوعات

زراعة

روابط وملفات

التعريف والنوع

رقم الوثيقة

fcb31328-b3db-4939-9b0b-26b52fb80912

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1960451_1.pdf

بيانات النشر

ترجمة العنوان

Assessment of Reproductive and Health Status of Friesian Cattle in Some Syrian Farms

ألقاب المؤلفين

[{"name_ar":"أحمد عواس","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"محمود إبراهيم المحمد","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محي المزيد","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

تقييم الوضع التناسلي والصحي عند أبقار الفريزيان لبعض المباقر في سورية

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

The study was conducted in the Jubb Ramlah, Al-Mukhtariyya and Fedio cattle farms affiliated to the General Oraganisation of cattle in Syria. The aim of this study was to investigate the relationship between certain reproductive indicators and the factors affecting them. We investigated the effect of parity -age at the first calving, lactation length, the season of the successful insemination and calving season on various reproductive indicators including calving intervals, the number of inseminations required for fertilization, and days open. The relation between these reproductive indicators with milk yield and the length of lactation was also investigated. Moreover, the health status of the cows was evaluated. The study was conducted on 5316 production and reproductive records. The animals were randomly selected from each farm. The data were compiled and arranged and the variance analysis was performed to study the effect of various factors by the general linear model using the SPSS18 program. The descriptive statistics, the calculation of mean values and standard deviation were also done in the same program. The mean values were compared at a significant level of 5% using Duncan test. The results of the study show that the reproductive efficiency of the Friesian cows in all the studied cattle farms were low compared to the global average values for this breed. The average age at the first successful insemination was 20.4 months, and the age at the first calving was 29.5 months. The number of inseminations required for fertilization was 3.6 and the difference was insignificant among the farms. The average value of days open was 428.22 days and the differences were significant between the farms for these two indicators. The length of the lactation was 336.9 days with significant differences between the farms. In the study of the relationship between reproductive indicators and milk production, there was a significant correlation between the milk quantity (p<0.01) and the reproductive indicators, with the highest reproductive efficiency in low yielding cows, while the lowest reproductive performance was in high yielding cows (>6500 kg).The results of the study showed lower reproductive efficiency with longer lactation cycle. The season of the successful insemination and calving season didn’t affect the reproductive indicators. The reproductive indicators were significantly influenced by the parity in which lowest reproductive efficiency was found in the first parity and the highest was seen in the fifth parity. The reproductive indicators were significantly influenced by the age at the first calving in the Jubb Ramlah cattle farm but not in the other farms. In the evaluation of the health status of the cows in different farms, it was noted that the percentage of health problems was different among the farms. The highest percentage was recorded in the Jubb Ramlah cattle farm (14.40%), while it did not exceed (11.36%) in Al-Mukhtariyya farm. Reproductive diseases accounted for the highest percentage of total health problems in the Jubb Ramlah cattle farm, whereas mastitis was the major health issue in the Al-Mukhtariyya and Fedio cattle farms. This is mainly due to differences in environmental, nutritional, administrative, health care and care practices between these farms

إشراف وإعداد

الإشراف

أحمد عواس, محي المزيد

الإعداد

محمود إبراهيم المحمد

الاقتباسات الببليوغرافية