The Effect of Some Reproductive and Productive Traits on Lactation Performance of Butana Cattle at Atbara Reseach Station

الموضوعات

زراعة

الملخص

This study was conducted to assess the effect of calving interval,age at first calving, lactation length and parity number on lactation yield,first 100-day milk yield & first 180-day milk yield on the 2nd and 3rdlactation of Butana cattle of the Sudan at Atbara Research Stationcovering the Years (1990-2001).The records were analyzed using spss computer programmes. Theleast square means for lactation milk yield, first 100-day milk yield, first180- day milk yield, age at first calving, calving interval and lactationlength were 1942.49 ± 117.65 kg, 812.52 ± 50.66 kg, 1363.18 ± 78.08kg, 45.09 ± 3.56 month, 382.38 ± 8.30 days and 268.17 ± 5.56 daysrespectively.The analysis of variance revealed that the calving interval, age atfirst calving and lactation length influenced the second lactation milkyield (p0.05) affect the third lactation milk yield, first 100- daymilk yield and first 180-day milk yield. Age at first calving had asignificant (p<0.05) effect on 3rd lactation milk yield and first 180- daymilk yield but non significant effect on first 100- day milk yield.Regarding, lactation length and lactation number the result showeddocumented highly significant (p<0.05) effect on first 100- day milk yieldand first 180- day milk yield on the 3rd lactation.The linear and quadratic regression on age at first calving andlactation length revealed a significant influence on the lactation yield &first 180- day milk yield in both 2nd and 3rd lactation, but a non significanteffect on first 100- day milk yield in 2nd lactation.The lactation length on the other hand exerted a highly significanteffect on the first 100-day milk yield in the 3rd lactation.Parity number had a significant effect on total milk yield, first 100-day milk yield and first 180- day milk yield for the 3rd lactation.The overall correlation co- efficient between milk yield, lactationlength, first 100- day milk yield , first 180- day milk yield and calvinginterval were found to be 0.68, 0.63, 0.79, and 0.11 respectively. Whilethe correlation between lactation length, first 100- day milk yield, first180-day milk yield and calving interval were 0.20, 0.35 and 0.16respectively

روابط وملفات

التعريف والنوع

رقم الوثيقة

0b540086-d502-492f-8990-a6a01256a4fe

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1639854_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"Abd El-Moneim M Abu Neikhaila","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Amna Bent Whab Abd El-whab","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

The Effect of Some Reproductive and Productive Traits on Lactation Performance of Butana Cattle at Atbara Reseach Station

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Abd El-Moneim M Abu Neikhaila

الإعداد

Amna Bent Whab Abd El-whab

الاقتباسات الببليوغرافية