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首页> 外文期刊>Tropical Animal Health and Production >Effects of Feeding Maize Stover and Cottonseed Cake on Onset of Puberty in Bunaji (Bos indicus) Heifers
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Effects of Feeding Maize Stover and Cottonseed Cake on Onset of Puberty in Bunaji (Bos indicus) Heifers

机译：饲喂玉米秸秆和棉籽饼对布纳吉小母牛青春期发病的影响

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摘要

A study was conducted to determine the influence of maize stover and cottonseed cake supplementation on age and live weight at onset of puberty in Bunaji heifers. A total of 49 pre-pubertal Bunaji heifers approximately 12 months of age were allotted randomly to one of two treatments of feed supplementation: (i) supplementation with maize stover and (ii) supplementation with cottonseed cake. The heifers were monitored for a period of 18 months for first observable oestrus or onset of puberty. The maize stover group were given maize stover (crop residue) supplementation ad libitum during the dry season; in the cottonseed cake group each heifer received 500 g of cottonseed cake per day during the dry season. The heifers supplemented with cottonseed cake attained puberty at an earlier age (23.9±1.2 months) than the heifers supplemented with maize stover (28.2±1.3 months; p<0.05). Similarly, heifers on the cottonseed cake supplementation attained puberty at a live weight of 270.5±3.5 kg; while the heifers on maize stover attained puberty at 237.6±5.8 kg (p<0.05). The cottonseed cake-supplemented heifers had higher daily gains than the maize stover-supplemented heifers. It is concluded that provision of cottonseed cake as a supplement for heifers hastened the onset of puberty when compared to the maize stover supplemented heifers. Puberty can be achieved at an early age with improved nutrition and this can in turn reduce the generation interval and thus increase the rate of genetic gain of indigenous animals. Provision of protein supplements in cattle is recommended, especially in the tropics where marked seasonality of rainfall results in extremely poor pastures and herbage and low available protein.
机译：进行了一项研究，以确定在Bunaji小母牛出生时，玉米秸秆和棉籽饼补充剂对青春期开始时的年龄和活体重的影响。将总共​​约12个月大的49个青春期前的布纳吉小母牛随机分配给两种饲料补充处理之一：（i）玉米秸秆补充和（ii）棉籽饼补充。监测小母牛18个月的时间，以观察首次发情或青春期的发作。玉米秸秆组在旱季随意补充玉米秸秆（作物残渣）；在棉籽饼组中，每个小母牛在干旱季节每天接受500克棉籽饼。补充棉籽饼的小母牛的青春期比补充玉米秸秆的小母牛的青春期更早（23.9±1.2个月）（28.2±1.3个月； p <0.05）。同样，补充棉籽饼上的小母牛的青春期体重为270.5±3.5 kg。玉米秸秆上的小母牛达到青春期为237.6±5.8 kg（p <0.05）。棉籽饼补充的小母牛的日增重高于玉米秸秆补充的小母牛。结论是，与玉米秸秆补充的小母牛相比，提供棉籽饼作为小母牛的补充会加速青春期的发作。青春期可以在营养改善的情况下实现，并可以缩短生育间隔，从而提高土著动物的遗传获取率。建议在牛中提供蛋白质补充剂，尤其是在热带地区，那里明显的降雨季节性会导致牧场和牧草极度贫瘠，而可用蛋白质却很少。

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