| 摘要: |
| 用棉酚含量4. 0 g /kg的棉籽饼以每头0. 5 kg /d饲喂怀孕奶牛35 d,研究棉酚对奶牛胎儿发育的影响。结果表明,在开始饲喂后14～46 d的流产率为9. 1% (17 /186);中毒的妊娠奶牛平均怀孕期为(275. 75±5. 21) d (n= 140),其所产的犊牛平均初生质量为(35. 27±5. 23) kg (n= 140),与1991和1993年同期相比较,平均怀孕期缩短2～3 d,初生犊牛平均质量降低3. 70 kg;活产母犊到6月龄和24月龄时,淘汰率分别为39. 7% (27 /68)和85. 3% (58 /68), 6月龄时平均质量为(146. 6±33. 8) kg (n= 45),平均日增质量为(0. 62±0. 20) kg (n= 45),分别比1991和1993年的平均值降低34. 5和0. 17 kg。 |
| 关键词: 棉酚,奶牛,胎儿,发育毒性 |
| DOI： |
| 分类号:S852.653 |
| 基金项目: |
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| The research of developmental toxicity for gossypol on dairy cow fetus |
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| Abstract: |
| It will exerta great influence on the growth and development of dairy cow
fetus if feeding pregnant dairy cow for 35 days with cottonseed cake 0. 5 kg per day
containing 4 g /kg gossypol. The rate of abortion were 9. 1% (17/186) during 14-46
days after beginning feed. The average gestation period of calves born by pregnant cow
of gossypol poisoning was (275. 75±5. 21) days (n= 140), 2-3 days shorten than that
of the year of 1991 and 1993, and the average newborn weight of calves was (35. 27±5. 23) kg (n= 140), 3. 70 kg lower than that of the year of 1991 and 1993.The rate of
elimination of living female calves after birth were 39. 7% (27/68) and 85. 3% (58/68)
during 6-month and 24-month respectively due to death, diseases or slow growth and
development.The average weight of female calves on 6 month was (146. 6±33. 8) kg
(n= 45), and the average increased weight per day was (0. 62±0. 20) kg (n= 45),
reduced 34. 5 kg and 0. 17 kg than that of the year of 1991 and 1993 respectively. |
| Key words: gossypol,dairy cow,fetus,developmental toxicity |
