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首页> 外文期刊>Malaysian Journal of Animal Science >Effects of ascorbic acid supplementation on broiler chickens stocked at two different densities in a humid tropical environment
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Effects of ascorbic acid supplementation on broiler chickens stocked at two different densities in a humid tropical environment

机译：补充抗坏血酸对热带潮湿环境下两种密度饲养的肉鸡的影响

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The quest to meet up with the high demand for poultry products has made farmers adopt new means of rearing birds without incurring more cost. One of these husbandry practices is by varying the stocking density. Increasing stocking density may however result in additional stress which may reduce production efficiency. Arising from this, a completely randomized design experiment was carried out to determine the effects of ascorbic acid (AA) supplementation on performance and carcass characteristics of broiler chickens stocked at two different stocking densities. A total of 150 day-old Marshall broilers were brooded for 2wk. and randomly allotted into 4 treatment groups of 3 replicates each: Treatment 1 optimal stocking at 7birds/m2, Treatment 2 double stocking at 14 birds/m2and no AA supplementation, Treatment 3 double stocking at 14 birds/m2and 150% AA supplementation and Treatment 4 double stocking at 14 birds/m2 and 300% AA supplementation. Feed intake, live weight, feed:gain ratio and livability differed (p0.05). Highest weight gain amongst birds on double stocking density was obtained from birds with 300mg AA supplementation/litre of water (1391.82 compared with 1161.48 and 1308.33 g/bird for Treatments 2 and 3, respectively. Dressed weight, dressing percentage, breast cut, drumstick, wing and liver weights as percentage of live weight were influenced (p<0.05) by stocking density and AA supplementation. Gross Margin analysis indicated that increasing the stocking density resulted in % gross margin changes of -56.73, +50.73 and 80.47% for birds produced on double stocking density without AA, double stocking density and 150mg AA/litre of drinking water and double stocking density and 300mg AA/litre of drinking water, respectively compared to the optimal stocking density. The findings of this study conclude that double stocking density of broilers at 14birds/m2and 300mg AA supplementation/litre of water can be adopted in the study location to improve production efficiency per unit space.
机译：为了满足对家禽产品的高需求，农民不得不采用新的养禽方法，而又不会增加成本。这些饲养方法之一是通过改变饲养密度。但是，库存密度的增加可能会导致额外的压力，从而降低生产效率。因此，进行了完全随机的设计实验，以确定补充抗坏血酸（AA）对以两种不同饲养密度饲养的肉鸡的生产性能和car体特性的影响。总共对150天大的Marshall肉鸡进行了2周的育雏。并随机分配到4个治疗组中，每组3个重复：处理1最佳饲养量，每只2鸟，每只7只，治疗2双重饲养，每只平方米14只，不添加AA，治疗3双重饲养，每只鸟14平方米，每只150％的AA补充和治疗4以14只/平方米的面积放养两次，并补充300％的AA。采食量，活重，饲料：增重比和宜居性有所不同（p0.05）。补充量为每升水300mg AA的家禽中增重最高的家禽（1391.82，而处理2和3分别为1161.48和1308.33 g /只。穿衣重量，敷料百分比，割胸，鸡腿，饲养密度和AA的补充影响了鸡的机翼和肝脏重量占活重的百分比（p <0.05）。毛利润率分析表明，增加饲养密度会使所生产的禽类的毛利润率变化-56.73，+ 50.73和80.47％与最佳饲养密度相比，无AA的双重饲养密度，饮用水的双重饲养密度和150mg AA /升以及饮用水的双重饲养密度和300mg AA /升分别达到最佳饲养密度。在研究地点可以采用14只/平方米的肉鸡和300毫克AA /升的水，以提高单位空间的生产效率。

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