Studies on the udder characteristics of Korean Holstein cows

Lee, Jeong-chi; Lee, Chung-gil; Lee, Chai-yong

Korean Journal of Veterinary Research 2004;44(1):143-150.

Jeong-chi Lee¹, Chung-gil Lee², Chai-yong Lee²

¹Department of Veterinary Nurse and Pets Sciences, Seojeong College
²College of Veterinary Medicine, Chonnam National University

국내 젖소의 유방 특성에 관한 연구

이정치¹, 이정길², 이채용²

¹서정대학 애완동물과
²전남대학교 수의과대학

Abstract

This study was conducted to analyze the relationship between the occurrence of mastitis and the conformation of udders, teats, and teat tips of Holstein cows raised in Korea. Udders, teats, and teat tips were categorized by their conformation and the teat length, teat diameter and the distance from the tip of teat to the ground of 259 cows were measured. The most common shapes of udder, teats and teat tip were milking machine udder (27.4%), U-shaped teats (53.9%) and disk teat tip (53.8%), respectively. Mean teat length and diameters were 4.78 cm and 3.11 cm, respectively. The length and the diameter of front teats were significantly longer and wider than those of rear teats. However, the distance of the tip of teats to the ground was similar between front teats $(50.5{pm}7.51cm)$ and rear teats $(50.7{pm}8.83cm)$. The average daily milk yield was 26.4 kg/day, and the highest milk yield was observed from cows with large udder shape and above 4th lactation.

Key Words: udder, teat, teat tip, Holstein cows, Korea