Mayntz M, Smårs S
Arch Exp Veterinarmed. 1989 Jan;43(1):39-50.
The following frequencies of change between 30 kPa milking vacuum and atmospheric pressure were used in a milking experiment with single-space cups: 0.05 Hz, 0.1 Hz, 0.2 Hz, 0.35 Hz, 0.5 Hz, 0.65 Hz, 0.8 Hz, and 0.95 Hz. Milking cup pressure and instantaneous milk flow rate through the teat canal were repetitively recorded ten times per second. Four clearly distinguishable and reproducible forms of flow rate oscillations were observed across several sucking phases together with four equally distinguishable and reproducible forms of profiles of a variable milk flow rate within one sucking phase. The occurrence of those differentiated forms of milk flow was found to be correlated primarily with both the sucking phase frequency applied and the average milk flow rate. These findings seem to be indicative of active control of teat canal diameter or milk flow rate by the unstriated teat musculature.
在一项使用单腔挤奶杯的挤奶实验中，采用了以下30 kPa挤奶真空与大气压力之间的变化频率：0.05 Hz、0.1 Hz、0.2 Hz、0.35 Hz、0.5 Hz、0.65 Hz、0.8 Hz和0.95 Hz。挤奶杯压力和通过乳头管的瞬时奶流速率每秒重复记录十次。在几个吸吮阶段观察到四种清晰可辨且可重复的奶流速率振荡形式，以及在一个吸吮阶段内四种同样可辨且可重复的可变奶流速率曲线形式。发现这些不同形式的奶流出现主要与所施加的吸吮阶段频率和平均奶流速率相关。这些发现似乎表明，乳头平滑肌对乳头管直径或奶流速率进行了主动控制。
