| 摘要: |
| 本文研究由饮水氟引起的奶牛氟病对中国黑白花奶牛泌乳量的影响,并对其奶质量进行安全评价。饮用含氟2.15ppm 的饮水对奶牛第一和第二胎的泌乳量没有影响,其泌乳量分别为正常奶牛的100.30%和104.31%。氟中毒奶牛第三和第四胎的泌乳量显著低于正常奶牛,分别为正常奶牛的87.36%和87.69%。氟中毒奶牛第二、第三和第四胎的泌乳量相互之间无显著差异(P>0.05),即不出现产乳高峰期。氟病奶牛乳中氟残留量很低(平均0.0351ppm),甚至可低于正常奶牛乳中氟残留量(平均0.0996ppm),为之人饮用氟病奶牛的乳是安全的。 |
| 关键词: 中国黑白花奶牛 显著差异 泌乳量 残留量 饲喂奶牛 安全评价 调查研究 四胎 氟中毒 |
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| THE INFLUENCE OF FLUOROSIS ON THE MILK PRODUCING ABILITY IN CHINESE HOLSTEIN COWS |
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| Abstract: |
| The paper reports the influence of drinking-water fluorosis on the milk production and the safety evaluation of milk quality in Chinese Hol stein cows. Statistically,an average intake of 2.15ppm F-in drinking water by cows had no effect on the levels of milk production in the 1st and 2nd lac tations;they were 100.30% and 104.31% of normal cows respectively.The levels of milk production in the 3rd and 4th lactations were 87.36% and 87.69%,which were significantly lower than those of normal cows.The levels of... |
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