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首页> 外文会议>Annual International Meeting of The American Society of Agricultural and Biological Engineers >Nitrogen excretion by laying hens fed with different energetic levels ration and in controlled environments (thermal stress)
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Nitrogen excretion by laying hens fed with different energetic levels ration and in controlled environments (thermal stress)

机译：通过铺设具有不同能量水平的母鸡和受控环境（热应力），通过饲喂母鸡（热应力）来排泄氮排泄

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According to data from the Brazilian Institute of Geography and Statistics (IBGE), in 2016, 39.5 billion eggs were produced. This production is attributed to the genetic improvement of laying hens, balanced diets and also to the accommodation of thesehens in vertical systems. Consequently, this type of production causes a high rate of manure per area. As environmental problems associated with manure, we have the eutrophication of lakes and rivers, soils acidification, and the increase of greenhousegas emissions. The temperature of environment and the metabolizable energy levels in diet may influence the rate of nitrogen excretion by laying hens. The nitrogen content in the laying hens manure was evaluated during the posture peak. Four climatic chambers were used; Chamber 01 was set at 20°C for 24 hours a day (thermal comfort - control). It is known that elevated temperatures cause higher concentrations of ammonia in the blood of the birds and may provide higher excretions of uric acid, so in Chambers 02, 03 and 04, the animals were subjected to 12 hours of heat stress (25°C, 30°C and 35°C respectively), and 12 hours in 20°C, comfort. Also, the metabolizable energy levels in ration was varied equal to 2700, 2800, 2900 and 3000 kcal/kg. It was concluded that the ambient temperature exerts a positive influence on the nitrogen excretion by hens, which leads to a higher ammonia emission potential to atmosphere. There was no influence of the metabolizable energy levels on excretion of this nutrient.
机译：根据巴西地理和统计研究所（IBGE）的数据，2016年，生产了395亿鸡蛋。该生产归因于垂直系统中铺设母鸡，均衡饮食和均衡的遗传改善。因此，这种类型的生产导致每个区域的高粪便。作为与粪肥相关的环境问题，我们有湖泊和河流，土壤酸化和温室净排放量的富营养化。饮食中的环境温度和可代谢能量水平可能影响母鸡的氮气排泄速率。在姿势峰值期间评估铺设母饲养肥料中的氮含量。使用了四个气候室;腔室01在20℃下设置每天24小时（热舒适性 - 控制）。众所周知，升高的温度导致鸟类血液中浓度较高，可以提供尿酸的较高排泄，因此在腔室02,03和04中，将动物进行12小时的热应激（25°C， 30°C和35°C分别），12小时在20°C，舒适。此外，常量的代谢能量水平变化等于2700,2800,2900和3000kcal / kg。得出结论是，环境温度对母鸡的氮排泄产生积极影响，这导致大气的氨氨辐射潜力。对这种营养素排泄没有可代谢能量水平的影响。

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