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精量饲喂系统的核心技术是奶牛个体识别技术。系统采用了非接触式的无线射频识别（RFID）技术，奶牛佩带符合ISO11785标准的电子标签。采食开始前，系统核对奶牛信息后按照饲喂要求进行自动投料。系统各测量数据将通过以ZigBee为核心建立起来的无线网络传输到主控计算机，同时主控计算机将奶牛饲喂规则的相关控制指令也通过无线网络传送到饲喂装置，控制饲喂装置工作。系统预留相关扩展接口方便后续升级使用。
Short- and Long-Term Production Losses and Repeatability of Clinical Mastitis in Dairy Cattle
clinical mastitis production repeatability
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2008/8/6
Between 1985 and 1990, a study of 5313 lactations of 2477 Black and White cows was carried out. A stepwise least squares method was used to obtain unbiased estimates of milk, fat, and protein losses t...
Strategies for Preventing Milk Fever in Dairy Cattle
milk fever hypocalcemia potassium cation-anion difference
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2008/7/30
Milk fever is a complex metabolic disorder that occurs at the onset of lactation. Clinical symptoms of this disease include inappetence, tetany, inhibition of urination and defecation, lateral recumbe...
Time of Ovulation Relative to Mounting Activity in Dairy Cattle
artificial insemination estrous behavior ovulation radiotelemetry
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2008/7/3
Time of ovulation was determined for Holstein cows (n = 51) for estruses occurring spontaneously (n = 33) or those induced by PGF2 (n = 86). Ultrasound examination of ovaries was conducted 42 to 49 d ...