Managerial factors affecting milking-abilities of Holstein cattle under intensive production system in Egypt.

IF 1.7 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
E Faid-Allah, Reem S Mourad, E I Saddick, E Eldahshan
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Abstract

This article aims to explore milking-ability criteria of Holstein dairy cattle under intensive production system in Egypt and investigate some managerial factors that influence them in dairy farms. The data obtained from five herds belong to a commercial intensive production system farm, Egypt. Data included 3509 records. The values of mean ± SD (CV%) of the milking-ability criteria for Holstein dairy cattle as follow: daily milk yield, kg (dmy), milking duration, min (MD), peak flow rate, kg min-1 (PFR), average flow rate, kg min-1 (AFR), AFR0:15 s of milking, AFR15:30 s of milking, AFR30:60 s of milking, and AFR60:120 s of milking were 30.34 ± 6.76 kg, (22.27%); 4.16 ± 0.79 min (19.06%); 3.62 ± 0.79 (21.77%); 0.28 ± 0.11 (39.48%); 1.40 ± 0.49 (36.37%); 1.26 ± 0.50 (39.95%); and 1.96 ± 0.71 (36.05%), kg min-1, respectively. The milking-time (a.m./p.m.) and the herds' men influenced significantly (P ≤ 0.01) on dMY, and milking-ability criteria. In addition, there was a significant effect (P˃0.05) of cows' dry-period on dMY, MD, PFR and AFR. Also, it was clearly appearing that there was a dramatic significant decrease in daily milk yield and AFR by increase mastitis infection times. Milking-ability criteria in Holstien cattle may be go better via good management, hygiene, and well-trained herds' men. The cubic models are higher in determination coefficient (p ≤ 0.05) than linear models for the curve estimates through the time of lactation period for studied traits. The curve of milk yield and milking-abilities were inconstant all over lactation period.

埃及集约化生产制度下影响荷斯坦牛挤奶能力的管理因素。
本文旨在探讨埃及集约化生产体系下荷斯坦奶牛的泌乳能力标准,并探讨影响荷斯坦奶牛泌乳能力的管理因素。从埃及一个商业集约化生产系统农场的五头畜群获得的数据。数据包括3509条记录。荷斯坦奶牛泌乳能力指标的平均值±SD (CV%)分别为:日产奶量、kg (dmy)、挤奶时间、min (MD)、峰值流量、kg min-1 (PFR)、平均流量、kg min-1 (AFR)、AFR0:15 s挤奶、AFR15:30 s挤奶、AFR30:60 s挤奶和AFR60:120 s挤奶,分别为30.34±6.76 kg,占22.27%;4.16±0.79 min (19.06%);3.62±0.79 (21.77%);0.28±0.11 (39.48%);1.40±0.49 (36.37%);1.26±0.50 (39.95%);分别为1.96±0.71 (36.05%)kg min-1。挤奶时间(上午/下午)和牧群男性对奶牛dMY和挤奶能力指标有显著影响(P≤0.01)。奶牛干期对dMY、MD、PFR和AFR均有显著影响(P > 0.05)。此外,很明显,随着乳腺炎感染次数的增加,日产奶量和AFR显著下降。通过良好的管理、卫生和训练有素的牧场主,荷斯汀牛的挤奶能力标准可能会更好。三次模型的决定系数高于线性模型(p≤0.05)。泌乳量和泌乳能力曲线在整个哺乳期均呈非恒定曲线。
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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来源期刊
Tropical animal health and production
Tropical animal health and production 农林科学-兽医学
CiteScore
3.40
自引率
11.80%
发文量
361
审稿时长
6-12 weeks
期刊介绍: Tropical Animal Health and Production is an international journal publishing the results of original research in any field of animal health, welfare, and production with the aim of improving health and productivity of livestock, and better utilisation of animal resources, including wildlife in tropical, subtropical and similar agro-ecological environments.
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