Manifestation of the genetic potential of laying hens under heat stress

I. Gorlov, Z. Komarova, A. V. Rudkovskaya, D. N. Nozhnik, E. Tarasov
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Abstract

Aim. Study of the effectiveness of the use of the feed additive "Mega HenOn" in the training of chickens of an industrial herd of the cross "Highsex brown" under heat stress. Materials and Methods. Evaluation of the efficiency was carried out for 32 weeks on industrial chickens in the amount of 70 heads. During the experiment, the egg production of chickens (daily), feed costs, and the category of eggs were taken into account. To determine the quality characteristics of edible eggs, GOST 31654-2012 “Edible hen eggs. Technical conditions". Results. The studied additive had a positive effect on the egg productivity of chickens, both during heat stress and during normalization of the temperature regime. At the age of 47-50 weeks (June-July, the ambient temperature during the daytime increased to 38-40°C), egg production dropped sharply, and in the control group it was 79.03%, and in the experimental group, despite the decrease, it exceeded this indicator by 3.63%. At the age of 51-58 weeks (July-August, the increase increased to 36°C), the decrease in egg production continued, but in comparison with the previous period, there was a certain trend towards recovery, which amounted to 85.51%, exceeding the control by 2.22%. The studied feed additive, to some extent, neutralized the negative effect of heat stress on the body of birds. In general, over the period of the experiment, the egg-laying intensity in the experimental group was 89.1%, and in the control group - 87.09%. The cost of producing 10 eggs in the experimental group is 1.29 kg, which is 0.07 kg less than in the control group. The yield of eggs of the category "superior" and "selected" in the experimental group exceeded the control by 0.53 and 16.89%. The yield of eggs of the II category turned out to be higher in the control group and amounted to 29.56%, which is higher than in the experimental group by 13.73%. Conclusion. The use of the innovative “Mega HenOn” feed additive, in the diets of chickens during the heat stress period, contributed to a more complete realization of the genetic potential of birds, due to the stabilization of metabolic processes in the body of birds, an increase in egg production, a decrease in the yield of culling eggs and, as a consequence, an increase in the level of profitability by 2.38%.
热应激条件下蛋鸡遗传潜能的表现
的目标。饲料添加剂“Mega HenOn”在热应激条件下对杂交“高性棕”工业鸡群进行训练的有效性研究。材料与方法。以70头工业鸡为试验对象,进行了32周的效率评价。试验期间,考虑了鸡的产蛋量(日)、饲料成本和鸡蛋种类。为确定食用鸡蛋的质量特性,参照GOST 31654-2012《食用母鸡鸡蛋》。技术条件”。结果。所研究的添加剂对鸡在热应激和温度状态正常化期间的产蛋率都有积极的影响。47 ~ 50周龄(6 ~ 7月,白天环境温度升高至38 ~ 40℃)产蛋率急剧下降,对照组产蛋率为79.03%,试验组产蛋率虽有所下降,但仍超过该指标3.63%。51 ~ 58周龄(7 ~ 8月,温度升高至36℃)产蛋量继续下降,但与前期相比有一定的回升趋势,产蛋量达85.51%,比对照高出2.22%。所研究的饲料添加剂在一定程度上抵消了热应激对鸟类身体的负面影响。总体而言,试验组产蛋率为89.1%,对照组为- 87.09%。试验组每产10只蛋的成本为1.29 kg,比对照组低0.07 kg。试验组“优”类和“选”类的产蛋率分别比对照组高0.53%和16.89%。II类蛋的产蛋率在对照组较高,达到29.56%,比试验组高13.73%。结论。在热应激期的鸡日粮中使用创新的“Mega HenOn”饲料添加剂,有助于更全面地实现鸟类的遗传潜力,因为鸟类体内代谢过程稳定,产蛋量增加,剔除蛋的产量降低,因此盈利水平提高了2.38%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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