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首页> 外文期刊>Tropical Animal Health and Production >Ovarian activity and estrus behavior in early postpartum cows grazing Leucaena leucocephala in the tropics
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Ovarian activity and estrus behavior in early postpartum cows grazing Leucaena leucocephala in the tropics

机译：热带地区放牧银合欢的产后早期奶牛的卵巢活动和发情行为

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The legume Leucaena leucocephala (Leucaena) is widely used to supplement forage in silvopastoral livestock systems in Latin America. Little is known about its possible effects on the cow reproductive dynamic. The aim was to evaluate the effect of Leucaena foliage intake on re-establishment of ovarian activity and estrus behavior in early postpartum (7-90 days) cows. Twenty-four multiparous Bos taurus x Bos indicus cows were divided into two homogenous groups and assigned to one of two treatments: a silvopastoral system (SS, n = 12), consisting of an association of Cynodon nlemfuensis grass and L. leucocephala; and a control system (CS, n = 12), consisting of C. nlemfuensis alone. Intake of Leucaena in the SS ranged from 3.80 to 6.43 kg DM/cow/day. Plasma mimosine concentrations ranged from 1270 to 1530 mu g/mL, and those for 2,3-dihydroxypyridine (DHP) from 147 to 729 mu g/mL. No 3,4-DHP was detected in plasma. No difference (P > 0.05) between treatments was observed for the number of cows exhibiting small, medium, or dominant follicles, or estrus behavior. The number of cows which re-established ovarian cyclicity (n = 6) was lower (P < 0.05) in the SS than in the CS (n = 9). Corpus luteum lifespan was longer (P < 0.05) in the SS than in the CS. Intake of Leucaena affected the number of cows exhibiting ovarian cyclicity and extended corpus luteum life, but did not affect follicular development and estrus behavior.
机译：豆科白术白种（Leucaena leucocephala）（Leucaena）被广泛用于在拉丁美洲的牧草畜牧系统中补充草料。关于其对母牛生殖动态的可能影响知之甚少。目的是评估在产后早期（7-90天）奶牛摄入白花菜叶对卵巢活性和发情行为的恢复作用。将二十四头产的牛（Bos taurus）x印度牛（Bos indicus）分为两个同质组，并分配给以下两种处理方法之一：食牧系统（SS，n = 12），由犬齿草（Cynodon nlemfuensis）草和白头翁L. leucocephala组成。一个控制系统（CS，n = 12），仅由C. nlemfuensis组成。 SS中白术的摄入量为3.80至6.43 kg DM /牛/天。血浆含羞草浓度为1270至1530μg / mL，2,3-二羟基吡啶（DHP）的浓度为147至729μg / mL。血浆中未检测到3,4-DHP。对于表现出小卵泡，中卵泡或优势卵泡或发情行为的母牛数量，治疗之间无差异（P> 0.05）。在SS中，重新建立卵巢周期性的奶牛数量（n = 6）比在CS中低（P <0.05）（n = 9）。 SS中的黄体寿命比CS更长（P <0.05）。银合欢的摄入影响了表现出卵巢周期和延长黄体寿命的母牛数量，但并未影响卵泡发育和发情行为。

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