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Upgrade of egg quality through different heat-combating systems during high environmental temperature

机译：在高温环境下通过不同的加热系统提高鸡蛋品质

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The aim of the study was to find out the effect of various heat-combating systems (HCS) on the egg quality characteristics of commercial laying hens during high environmental temperature of the year. Three hundred pullets were wing banded and randomly divided into 15 experimental units comprising of 20 pullets each. These units were randomly allotted to five treatment groups, replicated thrice according to four heat-combating systems (desert cooling, water sprinkling, time limit feeding, ascorbic acid supplementation), and the control was maintained under the same housing system. The mean values of egg weight, eggshell thickness, Haugh unit, thick albumen height, yolk height, and yolk diameter were calculated. The layers kept under the influence of desert cooling produced eggs with more weight and thicker shells than those under other systems. Results of the present study did not show any difference in the shell thickness between water sprinkling and ascorbic acid supplementation as compared to the control group. Haugh unit and yolk index values obtained from the layers kept under various HCS did not significantly differ from those of the control group. All HCS significantly reduced the occurrence of blood spots in the eggs as compared to the control. All the treatments in general markedly reduced the incidence of meat spots in the eggs especially with the supplementation of ascorbic acid being the most effective. Among all of the treatments, the desert cooling system proved to be the best for producing better-quality eggs during hot periods of the year with less humidity
机译：该研究的目的是找出一年中最高的环境温度下各种热交换系统（HCS）对商品蛋鸡蛋品质特性的影响。将三百只小鸡带翼，并随机分为15个实验单元，每个单元包括20个小鸡。这些单元被随机分配到五个处理组，根据四个热系统（沙漠冷却，洒水，限时补给，抗坏血酸补充）重复三次，并且将对照保持在相同的住房系统下。计算蛋重，蛋壳厚度，霍夫单位，厚蛋白高度，蛋黄高度和蛋黄直径的平均值。与其他系统相比，在沙漠冷却的影响下产蛋的蛋具有更大的重量和更厚的壳。与对照组相比，本研究的结果表明在洒水和添加抗坏血酸之间的壳厚度没有任何差异。从保持在各种HCS下的各层获得的Haugh单位和蛋黄指数值与对照组没有显着差异。与对照相比，所有HCS均显着减少了鸡蛋中血斑的发生。一般而言，所有处理方法均显着降低了鸡蛋中肉斑的发生率，特别是补充抗坏血酸最为有效。在所有处理中，沙漠冷却系统被证明是一年中最热，湿度较低的情况下生产质量更好的鸡蛋的最佳方法

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