Some Studies On The Performance Of Holstein-Friesian Cattle In Khartoum State

الموضوعات

زراعة

الملخص

The objective of this study was to assess some of thereproductive and productive parameters of pure Holstein Friesian (HF)cattle under Azaheer company Farm conditions in Khartoum State.The data were collected from available records of 203 HF cowsall of which had four lactations covering the period from 1992-2005.The data was classified according to the years of calving, seasons ofcalving, (dry summer: March to June, wet summer: July to October,winter: November to February) and number of parities.Eight reproductive and productive traits were analyzed byANOVA (steel, 1997) using the computer program Statistical Packagefor Social Sciences (SPSS version 10.0).The means and standard errors for age at first calving, calvinginterval, open period, number of services per conception, lactationlength, milk yield, daily milk yield and dry period were 32.8 ± 0.4months, 454.8 ± 8.3 days, 176.0 ± 5.2 days, 3.2 ± 0.1, 312.330 ± 4.939days, 4014.1 ± 82.5 liters, 12.812 ± 0.238 liters, and 156.1 ± 7.0days, respectively.The analysis of variance revealed that the calving years had ahighly significant (P0.05).The calving year × season, interaction had a high significant(P< 0.01) effect on number of services per conception. It also had asignificant (P< 0.05) effect on age at first calving.Lactation length had a high significant (P< 0.001) effect onopen period and dry period.The calving year × Parity, Interaction had a significant (P<0.05)effect on calving interval.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0be96a6f-b38a-4ed3-b0f6-f748b5712b9b

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1639189_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"Amer Mohammed Saleh","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Malak Amer Basheer","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Some Studies On The Performance Of Holstein-Friesian Cattle In Khartoum State

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Amer Mohammed Saleh

الإعداد

Malak Amer Basheer

الاقتباسات الببليوغرافية