南京地区奶牛酮病病因和诊断的研究

泌乳早期母牛采食精料不足及精料能量水平偏低所致的能量负平衡是南京地区奶牛酮病的一个主要原因;干乳期精料饲喂过量,可能使产后母牛食欲恢复变慢,而加剧能量负平衡,促进酮病发生;有些产后疾病常影响食欲而导致继发性酮病。诊断学研究表明,乳汁中丙酮加乙酰乙酸含量明显低于血液值,故使用一般酮粉检测乳酮,将会使一些亚临床病例漏检,因此作为其诊断方法并不可靠。

STUDY ON ETIOLOGY AND DIAGNOSIS OF KETOSIS IN DAIRY COW IN NANJING AREA

Energy negative-balance caused by inadequate concentrate intake in early lactationand a relative low level of energy in concentrate was one of the main factors of ketosis inNanJing area.The slower rise of appetite in the first part of lactation possibly due to con-centrate overfeeding during dry period resulted in more marked energy deficit whichexacerbated severity of ketosis.Some postpartum diseases affecting appetite could lead tosecondary ketosis.It was shown that acetoe plus acetoaeetate was obviously lower inmilk than in plasma.Thus the milk test for K.B.with ordinary ketone powder,the sen-sitivity of which is approximately 10 mg/dl in plasma test,will cause some subclinicalcases to be missed and this means of diagnosis is considered to be unreliable.