Impact of a Wide Range of Teat Lengths on Udder Healt h and Milking Time in Holstein Cows

Q3 Agricultural and Biological Sciences Scientia Agriculturae Bohemica Pub Date : 2019-06-01 DOI:10.2478/sab-2019-0012

M. Gašparík, J. Ducháček, L. Stádník, V. Tančin

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引用次数: 3

Abstract

Abstract The objective of our experiment was to evaluate the impact of teat length on milk yield, actual milking time (AMT), milk conductivity (MC), somatic cell count (SCC) and mastitis incidence during lactation. The effect of teat length was evaluated as the occurrence of non-ideal teats (NIT; shorter than 40 mm or longer than 60 mm) at udder level and as the average length of teats on udder (ALTU). The experiment was conducted on 59 dairy cows of Holstein breed. SAS 9.3 was used for statistical calculation. There were great variances in teat length (22–96 mm) and in the rear/front teat ratio (0.8). Only 33% of the tested cows had optimal length of all teats. No evidence for a negative impact of NIT on udder health was found. ALTU showed a statistically significant effect on AMT and SCC (P < 0.05). Cows in the group of udders with short teats showed the worst results for SCC (P < 0.05) and MC. Udders with short teats showed the fastest AMT (6.78 min; P < 0.05) compared to udders with medium and long teats (7.36 min; P < 0.05 and 7.55 min; P < 0.05, respectively). Our results show that while using an udder friendly milking system, the effect of teat length on udder health could be negligible.

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大范围乳头长度对荷斯坦奶牛乳腺健康和挤奶时间的影响

摘要本实验的目的是评估乳头长度对泌乳期产奶量、实际挤奶时间（AMT）、导奶率（MC）、体细胞计数（SCC）和乳腺炎发病率的影响。乳头长度的影响被评估为乳房水平上出现的不理想乳头（NIT；短于40mm或长于60mm），以及乳头在乳房上的平均长度（ALTU）。对59头荷斯坦奶牛进行了试验。SAS 9.3用于统计计算。乳头长度（22-96 mm）和前后乳头比率（0.8）存在很大差异。只有33%的受试奶牛的乳头长度最佳。没有发现NIT对乳房健康产生负面影响的证据。ALTU对AMT和SCC的影响具有统计学意义（P<0.05）。短乳头组奶牛的SCC和MC结果最差（P<0.05），短乳头组的AMT最快（6.78分钟；P<0.05），而中、长乳头组（7.36分钟；分别为P<0.05和7.55分钟；P<0.05）。我们的研究结果表明，在使用对乳房友好的挤奶系统时，乳头长度对乳房健康的影响可以忽略不计。

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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