Research Of Compound Traditional Chinese Medicine In The Impact On Cold And Heat Stress In Laying Hens

As the inevitable stressor in the nature, Cold and hot environmental conditions have a very complicated response mechanism, which mobilize almost all organs of the whole body and exert a direct impact on production performance of hens. Therefore, in order to achieve maximum interests, research on the stress response of cold-and-hot stress Compound Chinese Medicine Preparations to hens becomes particularly critical. This paper is to investigate the hens’ production performance indicators, stress hormones, and other change system of indicators with the hot and cold stressors, and deeply study the effects and regulation of cold and hot stress to hens. The results are shown as follows:Experiment I: Effects of Compound Chinese Medicine PreparationsⅠon cold stress.First, ninety 30-week-old healthy white chicken were selected and divided into three groups with 30 in a group. These hens were freely grazed with basic diets. The temperature of Group A and A1 was maintained at 11-15℃, and 20-24℃ for Group B. 3% Compound Chinese Medicine Preparations I was added to feed for Group A1.1. Production performance measurement: measured the quantity of the rest feed and fed the hens daily at a fixed time, collected the eggs and recorded. Three series of related data was abrained. The experiment results showed that under the cold temperature, daily average feed intake, egg weight and feed-egg ratio increased while egg production rate decreased. Feed intake of Group A was significantly higher than that of Group A1(P <0.05). The egg weight of Group A was larger than that of Group A1, and the difference was also significant(P <0.05). Egg production rate of Group A was lower significantly than that of Group A1(P <0.05). Feed-egg rate of Group A was higher than that of Group A1, and the difference was significant(P <0.05).2. Serum hormone measurement: The serum hormone was measured on the 28 th day by drawing blood from wing veins via anticoagulant blood vessels. The experiment results indicated that under cold temperature, hens’ T4 increasesd while hormoe contents of other four hormone reduced. Compary Group A and Group A1, T4 reducesd(P <0.05), whereas T3, GH, E2 and COR increased.3. Serum biochemical test: measure it on the 28 th day by drawing blood from wing veins via anticoagulant blood vessels. We found that under cold temperature, Sodium, potassium, calcium, glucose and alanine transaminase increased,while the rest except cholesterol reduced. Compared to Group A1, Sodium, potassium, calcium, glucose and alanine transaminase in Group A1 reduced. while sodium, chloride and phosphorus increased. Total protein and aspartate aminotransferase increased as well.Experiment II: Effects of Compound Chinese Medicine Preparations Ⅱ on cold stress.First, ninety 30-week-old healthy white chicken were selected and divided into three groups with 30 in a team. These hens were freely fed with basic diets. The temperature of Group C and C1 was maintained at 26-30℃, and 20-24 ℃ for Group B. 3% Compound Chinese Medicine Preparations Ⅱ was added to feed for Group C1.1. Production performance measurement: measured the quantity of the rest feed,fed the hens daily at a fixed time, collected the eggs and recorded. Three series of related data was abrained. The experiment results showed that under the hot temperature, daily average feed intake, egg weight and egg production rate decreased while feed-egg ratio increasesd. Feed intake of Group C was significantly lower than that of Group C1(P <0.05). Produced egg weight of Group C was significantly lower than that of Group C1(P <0.05). Egg production rate of Group C was significantly lower than that of Group C1(P <0.05). Feed-egg rate of Group C was significantly higher than that of Group C1(P <0.05).2. Serum hormone measurement:the serum hormone was measured on the 28 th day by drawing blood from wing veins via anticoagulant blood vessels. The results demonstrated that under hot temperature, hens’ T4 and T3 increased while the content of GH, E2 and COR reduced. Compared to Group C, T3 and T4 of Group C1 extremely reduced(P <0.01), while the content of GH, E2 and COR increased(P <0.05).3. Serum biochemical test: measure serum on the 28 th day by drawing blood from wing veins via anticoagulant blood vessels. We found that under hot temperature, aspartate aminotransferase and alanine transaminase increased,whie the rest except cholesterol reduced. Compared to Group C, sodium, potassium, chloride, calcium, phosphorus, total protein, glucose and alanine aminotransferase of Group C1 increased, aspartate aminotransferase and triglycerides reduced.To sum up, the above data suggest that Compound Chinese Medicine Preparations mitigates the adverse effects of environmental conditions on hens to some extent.