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Register a new userStudying the Factors Affecting Days Open of Holstein Cattle in Syria Coast Conditions
دراسة العوامل المؤثرة في طول فترة الراحة عند أبقار الهولشتاين في ظروف الساحل السوري
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Added by
Tishreen University ورقة بحثية
Publication date
2014
fields
Animal Production
and research's language is
العربية
Created by
Shamra Editor
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نُفذت هذه الدراسة في محطة أبقار فديو (المؤسسة العامة للمباقر محافظة اللاذقية) باستخدام 4352 سجلاً خاصاً بـ 1671 بقرة هولشتاين, جُمعت خلال الفترة الممتدة من عام 1990 و حتى عام 2013 لتحديد طول فترة الراحة, و دراسة تأثير كلٍ من سنة الولادة, فصل الولادة, موسم الإنتاج و التداخل بينها في هذا المؤشر الهام. حُللت البيانات إحصائياً باستخدام طريقة متوسط أدنى المربعات، و استخدم اختبار Duncan لمقارنة المتوسطات وفق برنامج SAS (version 9). بلغ المتوسط العام لطول فترة الراحة (150.23±1.44 يوماً), و أظهرت نتائج التحليل الإحصائي وجود تأثيراً معنوياً (0.001< p) لكل من سنة الولادة، فصل الولادة، موسم الإنتاج, التداخل بين سنة الولادة و فصلها, و للتداخل بين فصل الولادة و موسم الإنتاج, و (0.001< p) للتداخل الكلي بين سنة الولادة و فصلها و موسم الإنتاج في طول فترة الراحة، بينما لم يكن لكل من التداخل بين سنة الولادة و موسم الإنتاج أي تأثير معنوي. يُستنتج من البحث أن تحسين الأساليب الإدارية، و توفير كميات كافية و نوعية جيدة من الأعلاف يمكن أن يؤدي إلى تقصير طول فترة الراحة إلى حدودها المثالية (60 90 يوماً), و بالتالي تقصير طول الفترة بين الولادتين, ما يؤدي إلى الحصول على مولود كل عام, و زيادة الكفاءة التناسلية و الاقتصادية للمحطة.
This study was conducted at fedio dairy station belongs to the General organization for cattle in Lattakia.. A total of 2534 production records of 1771 Holstein cattle were used to study factors affecting the Days open (DO) during 1990 to 2013, and to study the effects of calving year, calving season, parity and interactions between studied factors on this trait. Data were analyzed by the Least Square Means, and Duncan test was used to compare means by SAS 9 program. The overall mean for Days Open (DO) was 150.23 ± 1.44 days. and affected significantly (P< .0..1) by calving year, calving season, parity and interaction (calving year × calving season), (calving year × calving season) and (P<.0.5 ) by interaction (calving year × calving season × parity) on the Days Open, but there was no significant effect for interaction (calving year × parity). Results suggested that better management, and improving the feeding status may reduce Days Open to typical period (60 - 90 days), reduce interval calving, to get calf every year, and increase reproductive and economic efficiency of dairy cattle at fedio station.
References used
Ajili, N ; Rekik, B ; Ben Gara, A. and Bouraoui, R, Relationships among milk production, reproductive traits, and herd life for Tunisian Holstein-Friesian cows. African Journal of Agricultural Research. Vol. 2, N.2, 2007, 047-051
Amin, M. R ; Habib M.A. and A.K.F.H. Bhuiyan. 2013. Reproductive potential of Red chittagong cattle in Bangladesh. journal of tropical resources and sustainable science. Vol. 1,N. 1, 2013, 71-86
Beever, D. E. The impact of controlled nutrition during the dry period on dairy cow health, fertility and performance. Animal Reproduction Science. Vol.96, N. (3-4), 2006, 212-226
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This study was conducted at Fedio Dairy Station using 2189 records for 790
Holstein cattle to study the effect of frozen–thawed bull semen, inseminator,
calving year (CY), calving season (CS) and parity (P) on the number of services
per conception
(S/C). Data were obtained between the period 2003 and 2013
and evaluated according to GLM procedure (SAS 9). Analysis of variance was
used to determine the effect of studied factors on S/C.
This study was conducted at Kharabo Dairy Station belongs to the Faculty
of agriculture, University of Damascus. 553 records for 206 Holstein Friesian
cattle were used to study factors affecting the calving interval during 1982 to
2007. Data were
exposed eccording to GLM, and analysis of variance was used
to determine the calving interval (CI) and the effect of calving year, calving
season, parity and interactions on the calving interval, and Duncan test was
used to compare means by SPSS program. The overall mean for (CI) was
459.12±4.90 days. and affected significantly (0.001>P) by calving year, but
there was no significant effect for calving season, parity and interactions
between studied factors on the calving interval. These results suggested that
better management, and applaying more efficient administration practices as
well as to improving the feeding status may reduce calving interval to typical
period of 365 days and increase reproductive and economic efficiency of dairy
cattle at Kharabo station.
This study was conducted at Kharabo dairy station belongs to the Faculty of
Agriculture، University of Damascus. 692 productive records for 269 Holstein
Friesian cattle were used to study the effects of calving year, age at first calving،
calving
season and parity on the adjusted 305-day milk yield. Data were
exposed to GLM, analysis of variance was applied to determine the effect of
studied factors and differences between averages were compared according to
Duncan test using SPPS 17. The overall mean for (305-d milk) was 6222.6 ±
62.01 kg. and affected significantly (P < 0.001) by calving year and parity and
(P<0.05) by age at first calving. No significant effect for season was observed.
Results suggested that better management practices and improving the feeding
status might help increasing the 305-d milk and making the status more
economic efficient in the dairy cattle at Kharabo Farm.
Records of ٤٤٥ Friesian cows were analysed for calving interval and its
components; days open, lactation length and length of dry period. The model
included parity, calving year and calving season. The overall means were
٤٢٥,٧٧ ± ١,٨٩, ١٤١,٣ ± ١,٣
٧, ٣٥٣,٩ ± ٠,٨٨ and ٧٣,٠٢ ± ٠,٧٧ days for calving
interval, days open, lactation length and length of the dry period respectively.
These estimates are high by tropical and subtopical standards, but they remain
lower than the reproductive performance of Friesian cattle in temperate
countries.
This study has been conducted on Syrian coastal area in 2013 season, aimed to
determines affecting factors on honey supply at that level Apiary and measure the price
supply elasticity . A field questioner was applied to obtain elementary data of a
random
sample consisted of (304) of Apiary.
The honey production has been estimated to (10.3) kg/hive and (603.8) kg/ apiary in
the study sample, (89.6%) of which were marketed, while the other part has been selfconsumed
at the apiary level. The marketing quantities of honey distributed between five
major marketing canals, the most important one was the direct selling to the consumers,
contributed to (77.1%) of total sample’ marketed quantities, followed by the selling to
wholesalers with contribution ratio estimated to (18.7%), while the selling to retailer types
(Honey specialized shops, Pharmacies, Grocers) have absorbed the remained small honey
quantities.
The supply price elasticity was estimated to (2.318), referring relatively to a high
elasticity supply. The more diversified marketing channels of honey at apiaries level has
positively affected supply quantities, especially when selling to wholesalers. Moreover, the
existence of selling and storing unites in apiaries in addition to the market information
system would also affect positively on supply quantities. The positively effect of apiary
size reflects the weak position of small size apiaries in supply controlling.
The more important result, was the negative impact of expertize and specialization
and education of producers on honey supplied quantities at apiaries level, Remunerating
Precarious conditions of current honey market, pressing on producers belonging to the
qualified category and indicates high risks of shrinking their leverage in honey sub-sector.
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