Milk yield, milk composition and reproductive performance of Baggara cattle as affected by parity under traditional system, Sudan

Huda Hamid Abakar Bashir, Hind Abdelrahman Salih, Ibrahim Omar Elimam, Ibrahim Bushara Mohammed
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Abstract

This study was conducted to evaluate parity order on milk yield and milk components and calving interval of Baggara cattle as affected by parity in West Kordofan State, Sudan. Forty eight cows were selected from the herd of Baggara cattle. The cows were weighed and divided into four groups A, B, C and D, each group comprised of (12) cows according to parity order, first, second, third and fourth parity. Data were analyzed by using F test for analysis of variance procedures and Duncan’s multiple range test (DMRT) for mean separation. All cows were raised on natural grazing. The results revealed that parity order significantly (p<0.05) affected daily, monthly and total milk yield. Milk production increased with advance parity. High (p<0.05) milk yield, monthly and daily milk scored by 3rd parities as 668.47 kg, 133.73kg and 4.49kg respectively. Results showed significant differences (p<0.05) between different parities for the milk composition during first and third month of lactation period, with high fat percentages in first month for 2nd parities (6.21) and 3rd parities (6.26) in 3rd month of lactation. The results indicated that calving days to first estrus and days to conceive were significantly (P<0.05) effected by parity number. Shorter days to show estrus was obtained by primiparous cows (56.19 ±8.72 days), also Days to conceive exerted significant (P<0.05) effect parity order. Results showed a significant differences (p<0.05) between different parities order for calving interval, that short days of calving interval scored by primiparous parities (10.04 months) and long days by 4th parities (13.17month). In conclusion, Baggara cows that depended on natural grazing reached its peak milk production in third parity with considered that the main purpose of these animals for meat production.
苏丹传统制度下受胎次影响的Baggara牛的产奶量、乳成分和繁殖性能
本研究旨在评估产次顺序对苏丹西科尔多凡州Baggara牛产奶量、奶成分和产犊间隔的影响。48头牛是从巴格加拉牛群中挑选出来的。称重后按胎次顺序分为A、B、C、D四组,每组12头奶牛。方差分析采用F检验,均值分离采用Duncan’s multiple range test (DMRT)。所有的牛都是自然放牧饲养的。结果表明,胎次顺序对日产奶量、月产奶量和总产奶量影响显著(p<0.05)。产奶量随着产价的提高而增加。第三胎产奶量高(p<0.05),月产奶量为668.47 kg,月产奶量为133.73kg,日产奶量为4.49kg。结果不同胎次泌乳1、3个月乳成分差异显著(p<0.05),第2胎和第3胎泌乳1个月脂肪率较高(分别为6.21和6.26)。结果表明,胎次数对产犊至初发情天数和妊娠天数有显著影响(P<0.05)。初产奶牛发情天数较短(56.19±8.72 d),受胎天数对胎次顺序有显著影响(P<0.05)。结果显示,不同胎次产犊间隔顺序差异有统计学意义(p<0.05),第一胎产犊间隔天数短(10.04个月),第四胎产犊间隔天数长(13.17个月)。综上所述,依靠自然放牧的Baggara奶牛在第三胎达到产奶量的峰值,认为这些动物的主要目的是生产肉类。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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