【摘要】 实验选用泌乳摩拉水牛16头、尼里11头及其与中国水牛杂交后代三品杂12头,分别测定乳头括约肌紧张度和乳房内压。结果表明:排乳反射前乳头括约肌紧张度超过500mmHg负压的,摩拉约占40％,尼里77％,三品杂100％;排乳反射后,500mmHg负压以下的三种水牛分别占93％、77％和46％。排乳反射前的乳房内压:摩拉、尼里、三品杂分别为9.59±0.58,10.25±0.67,7.66±0.63mmHg;排乳反射后,相应升至28.43±2.15,36.07±3.49,32.00±3.79,峰值分别为40.00±1.59,46.97±2.86,42.37±3.63mmHg。升至峰值所需时间分别为67.63±7.55,53.65±8.60,47.42±8.73s(秒)。尼里水牛的结果表明,乳头括约肌紧张度与乳房内压呈显著负相关。三种水牛的乳房和乳头的测量结果初步表明,都能适应机器挤奶。更多还原

【Abstract】 16 Murrah (M), 11 Nili (N) and 12 Tribred Hybrids (TBH) lactating water buffaloes were used in the experiment. The results showed that the teat sphincters of 40% of M, 77% of N and all of TBH maintained a high tonus above 500 mmHg negative pressure prior to milking reflex, and that after initiation of milking ejection, the tonus of teat sphincter of 93% of M, 77% of N, and 46% of TBH had a lower than 500 mmHg negative pressure. The intramammary pressure of all water buffaloes maintained about 10 mmHg positive pressure prior to milking reflex. Follwing initiation of milking ejection, the intramammary pressure rapidly inoreased to 28.43±2.15 mmHg in M, 36.07±3.49 in N and 32.00±3.79 mmHg in TBH respectively, and the highest peak was 40.00±1.59 mmHg in M, 46.97±2.86 mmHg in N and 42.37±3.63 mmHg in TBH. It took 67.63±7.55 sec. for M, 53.65±8.60 sec. for N and 47.42±8.73 sec. for TBH to rise to peak value. There were significant negative relationship between the tonus of teat sphincter and intramammary pressure in Nili water buffaloes (r=-0.5776 P<0.05). The data about the size of udder and teat in three bred of experimental water buffaloes show that most of the water buffaloes are fitted to milking machine.更多还原