สืบค้นงานวิจัย
The effect of age at first calving on productive life and lifetime profit in lactating Egyptian buffaloes (Buffalo Bulletin,40(1))
Ibrahim Atta Mohammed Abu El-Naser - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): The effect of age at first calving on productive life and lifetime profit in lactating Egyptian buffaloes (Buffalo Bulletin,40(1))
ผู้แต่ง / หัวหน้าโครงการ (EN): Ibrahim Atta Mohammed Abu El-Naser
หน่วยงานสังกัดผู้แต่ง (EN): Damietta (Egypt). Faculty of Agriculture. Animal Production Department
บทคัดย่อ (EN): Data on Egyptian buffalo were analyzed to estimate the effect of age at first calving (AFC, mo) classes on some productive traits [milk yield (MY, kg), milk yield per day, (MY/D, kg), and lactation period (LP, d) and reproductive traits [calving interval (CI, d) and number of services per conception (NSPC, count). Means for AFC were 916+-41, 1143+-72 and 1414+-119 days for early, average and late respectively. Additionally, means of milk yield (MY) for mentioned three levels of AFC were 1780+-774, 1920+-607 and 2040+-812 kg, respectively. Economic evaluations indicated that the profit per buffalo cow during the lifetime production were L.E 62960 (us dollars 3778), L.E 38538 (us dollars 2312) and L.E 3695 (us dollars 222) of early, average and late AFC, respectively. Reducing AFC was a positive influence on lifetime profit per buffalo cow. Lifetime profit rises to about L.E 24400, L.E 59200, and L.E 34800 when AFC decreased to 30 months from (38 months), to 30 months from (55 months) and to 38 months from (55 months), respectively. Heritability estimates for MY, MY/D, LP, CI, NSPC and AFC were 0.39+-0.09, 0.31+-0.07, 0.21+-0.08, 0.15+-0.06, 0.11+-0.07 and 0.57+-0.18, respectively. Genetic correlations between AFC and MY, MY/D, LP, CI, NSPC were -0.146+-0.33, -0.382+-0.30, +0.038+-0.47, +0.530+-0.49 and +0.311+-0.63, successively. The present results revealed that the buffaloes having late AFC were unprofitable during her productive life in the farm, but still needs further investigation of large data with different geographical area and management conditions.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://kukr.lib.ku.ac.th/db/kukr/search_detail/result/408327
เผยแพร่โดย (EN): มหาวิทยาลัยเกษตรศาสตร์ สำนักหอสมุด ฝ่ายสารสนเทศ
คำสำคัญ (EN): Egypt
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

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Ibrahim Atta Mohammed Abu El-Naser. "The effect of age at first calving on productive life and lifetime profit in lactating Egyptian buffaloes (Buffalo Bulletin,40(1))". ไม่ระบุหน่วยงาน. ม.ป.ป.

Ibrahim Atta Mohammed Abu El-Naser. "The effect of age at first calving on productive life and lifetime profit in lactating Egyptian buffaloes (Buffalo Bulletin,40(1))". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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The effect of age at first calving on productive life and lifetime profit in lactating Egyptian buffaloes (Buffalo Bulletin,40(1))
Ibrahim Atta Mohammed Abu El-Naser
มหาวิทยาลัยเกษตรศาสตร์ สำนักหอสมุด ฝ่ายสารสนเทศ
ไม่ระบุวันที่เผยแพร่
Effect of calving season and climatic factors on age at puberty, service period and successful mating in Nili-Ravi buffalo (Buffalo Bulletin,40(3)) Incidence of hydatid disease in buffaloes (Buffalo Bulletin,40(2)) Hydatidosis in buffaloes of Sammawah, Iraq (Buffalo Bulletin,40(2)) Effect of Mimosa pudica (Lajjalu) in cervico vaginal prolapse in buffaloes (Buffalo Bulletin,40(1)) Effect of dietary supplementation of astxanthin, prill fat and their combination on antioxidants and immunity status of lactating buffaloes during heat stress (Buffalo Bulletin,40(3)) Effect of Fenugreek (Methi) seed supplementation on performance of lactating Murrah buffaloes (Buffalo Bulletin,39(2)) Effect of cholesterol loaded cyclodextrin on cryosurvivability of buffalo spermatozoa (Buffalo Bulletin,40(1)) Gross morphological observations of liver in buffalo (Bubalus bubalis) (Buffalo Bulletin,40(1)) Study of genetic and non genetic factors affecting age at first calving and wet average in Mehsana buffaloes (Buffalo Bulletin,38(1)) An overview of traumatic reticulopericarditis in cattle and buffaloes (Buffalo Bulletin,40(2))
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