高氟环境对奶牛生产和繁殖性能的影响

通过检测宁夏某地奶牛内外环境中的饮水、饲料和土壤氟、硒、铜及血氟、毛氟、尿氟和全血硒、铜，证实该场奶牛高氟低硒低硐。日粮添加０。２６ｍｇ／ｋｇ硒和３．２ｍｇ／ｋｇ铜。连续饲喂３个月，低硒低铜现象消失，但高氟仍旧存在。高氟使奶牛子宫复旧时间、首次发情时间 科后配妊天数分别延长６．６ｄ、６ｄ和３８．５ｄ，产后孕酮含量始终低于健康奶牛，同时，奶牛胎衣不下发病率和乳房炎发病率分别高于健康奶牛１６．７％和１

Effect of Excessive Fluoride Environment on Productivity and Reproductive Performance in Dairy Cows

Examination on dairy cows fluoride, selenium and copper contents in external environment, such as drinking water, feedstuff and soil, and internal environment, such as serum or blood, hair and urine, have been conducted. It was confirmed that the dairy cows have excessive fluoride and low selenium/copper. While dairy cows were fed diets daily supplemented with selenium 0.25mg/kg and copper 3.2mg/kg for 3 months, the selenium and copper deficiency disappeared, but high fluoride still existed, the uterine recovery time, first estrous time and postpar-tum mating time prolonged for 6.6 days, 6 days and 38.5 days in excessive fluoride dairy cows respectively, and postpartum progesterone contents were less than the healthy cows. Meanwhile, the morbidity of retained placenta and mastitis in excessive fluoride cows were higher 16.7% and 13.3% than the healthy cows, the average daily milk yield per cow decreased 0.8kg. It was concluded that excessive fluorine affects the dairy cows, production and reproductive performance.