An important factor in determining the success of broiler breeding - temperature difference We know that building a good henhouse, selecting high quality chickens and feed, and scientific feeding and management, especially the control of temperature, humidity, density, ventilation, light, and feeding science, are essential factors for successful breeding. But in the breeding process, there is still a point that decides the decisive factors for the success or failure of breeding, and the most difficult to control in the breeding process is also the root cause of many diseases - temperature difference. It is well known that the core of feeding and management is temperature, humidity, and ventilation, which depend on each other and restrict each other. If the coordination of the three is not good, there will be a temperature difference. The maximum tolerance of the chicken during the hair exchange period is less than 2 degrees, and after the hair exchange is over The adaptability to temperature differences has been enhanced, but the maximum is not easy to exceed 4 degrees. The optimum temperature for chicks is 33-35 degrees (humidity is 65-70%), and it falls twice a week later. However, due to the accuracy of the thermometer, the difference in the suspension position, and the humidity, the temperature is also shown. Certain differences, so grasp the temperature in addition to the observation of the thermometer, the 14-day-old chickens should also refer to the situation of the flock, (25 days before the chicken can be referenced evenly distributed conditions and chicken mouth breathing situation, after 25 days of age You can judge whether the flock temperature is appropriate by referring to the chicken's mouth breathing and the compactness of chicken feathers. The difference in temperature is usually very simple, but it is not easy to control effectively throughout the breeding process; there are usually several cases of temperature difference: v Seasonal temperature difference Mainly refers to the impact of seasonal temperature on feeding and management throughout the year, and when the seasons alternate, the climate can easily be mutated and brought to the maintenance management. Spring features: low humidity, large temperature changes, windy: The main work of feeding and management: increase the humidity of the shed (especially the heating broiler house) until the chicken can not be relaxed; the width of the hen house is 13 meters below the main ventilation, the main use of natural ventilation, the appropriate use of the top Supplemented by fans and side fans, control air vents should not be too large, air intake should not be too fast, and adjust ventilation at any time according to your external temperature changes. Summer features: dry heat and heat coexist; The main work of feeding and management is mainly cooling. In the early summer, the air is suddenly hot, and vertical fans can be used to cool down the air. At this stage, it should be noted that although the outside temperature is already high, the air temperature is still relatively cool. Pay attention that the air inlet cannot directly blow the chickens, let alone let the wind pass under the mesh. Blow the chicken belly. As the temperature rises, the humidity gradually increases using the water curtain to cool down. During the early stages of use, care must be taken to use it slowly to prevent the curtain from entering the air and getting too cold (this can be done by adjusting the number of fans used and adjusting the small windows around the curtain to neutralize them. The cool wind of the wet curtain). After entering the dog days, it is necessary to let go of all cooling equipment, including fans, wet curtains, fog lines, etc. The precautions for this stage are: 1. Try not to wet the chicken feathers within the temperature range that the chicken can withstand. To avoid excessive wind speed, get cold. 2, pay attention to the dead end of the air, especially the two henhouses. 3. Pay attention to whether the wind speed in the middle of the house is up to standard. 4, pay attention to the ventilation at night to cool down. 5, do not control the water, we must promptly check the waterline. 6, pay attention to house negative pressure. 7, feed should be added less, less storage, so as not to be high temperature and humidity mold. The characteristics of autumn: The temperature difference gradually increases, and early autumn is more watery and windy; Compared with the summer season, the most difficult thing to keep in the autumn is ventilation. In the early autumn, high temperature and high humidity should be mainly cooled, and in the late autumn, it is a process based on insulation. Therefore, the principle of autumn ventilation is the preferred natural ventilation, followed by the top fan ventilation, and then reverse side fan ventilation, and then down the main fan ventilation; autumn ventilation precautions: 1, the preferred natural ventilation, if the environment is not controlled, then use the machinery Ventilation must be slowly opened and gradually increased. 2, the air inlet should not be large, keep the breeze constantly. 3, the outside temperature is the first standard of ventilation, it is necessary to turn off the fan in time. 4, back to ventilation. 5, warming and ventilation. 6, in case of cooling weather, must be warmed up in advance and close the vents. 7, compared with the summer season, the concentration of ammonia in the home is more, people suddenly enter the house there will be a certain taste, but there is a principle can not go beyond "You can make the nose feel the taste, but it must not make the eyes feel no Comfortable." 8. When the longitudinal fan and the side fan are used, the sewage outlet of the sunroof, top fan, and poultry house will become an air inlet, and it is necessary to pay attention to whether the temperature of the chicken in these places is appropriate. Winter features: The weather gradually gets cold, dry and windy The most important thing in winter is to test the seal and insulation of the chicken house. Attention should be paid to this stage: 1. The temperature difference will form a wind, and whether the cool air coming from the vents blows chickens. 2, in the late autumn and early winter seasons should pay attention to see the walls of the chicken house, roof, cut off whether the formation of water droplets, where the formation of water droplets, the winter will have cold into the house, causing the temperature difference in the house Yamato's local flock gets cold. 3. In the winter, vents will generally use feed bags without inner bags to block the upper part from turning the sirens into slow winds, allowing the winds to turn into breeze, and at the same time provide oxygen for the houses. 4. Add humidity to the house, especially chickens before 20 days of age. 5. The chicken's abdomen must not be cold. v Day temperature difference Mainly refers to the weather in clear, cloudy, fog, rain, frost, snow, wind caused by the feeding and management of the same and coping. In the breeding process, only constantly changing with the changes in the environment, so that the chicken group to minimize the incidence of disease, so the chicken Xikin not to lazy. Pay attention to changes in temperature over time during sunny days; When it is cloudy, we must provide heating facilities to the flock in time. We must not say that the stove was stopped after 17 days of age. Whoever is 20 days old is still burning. In fog, mechanical ventilation must be ensured and the breeze must be kept open. In rainy weather, it is necessary to pay attention to timely heating, to prevent the outside temperature drop caused by the decline in the temperature of the chicken house. When it comes to frost, it is often hot during the day and cold at night, especially at 1-5 o'clock in the morning. Pay attention to the small or closed air inlet and the normal work of the stove. The snow is not cold and the snow is cold. After the rain and snow days, it is necessary to promptly clear the snow on the roof of the chicken house, and appropriately increase the temperature of the house. Carefully ventilate, especially when it is snowing. The main test of the impact of sudden changes in weather on aquaculture is: rapid and timely. Do not think that cold will not matter, hot will not matter, to know the details of the success or failure. v Day and night temperature difference It is one of the most tiring aspects of the breeding process, mainly a process in which the temperature gradually increases during the day and gradually decreases in the evening. In this process, it is necessary to constantly adjust the heating equipment and ventilation equipment in order to minimize the temperature difference in the house. The most obvious four stages are: 7:00 am - 11:00 am, warming up, 13:00 - 15:00, high temperature, 17:00 - 22:00, cooling down, 1:00 am - 4: 00, low temperature stage. Of course, there are certain regional differences and seasonal differences in the above four phases to be flexible. v Outside temperature difference The outside temperature difference refers to the temperature difference formed by the interior temperature and the exterior temperature, and the temperature difference forms the wind. Therefore, it is an important reference indicator to know the temperature difference between the inside and outside of the vent, the size, and the direction of the vent. v Heat source temperature difference It is mainly because the chickens around the chicken house heat source are different from the overall temperature of the chicken house and chickens farther away from the heat source, especially the chickens heated by the heaters. Special attention should be paid to this. Heat sinks or air bags for heater stoves should be installed as far as possible on both sides of the wall, facing the wall or the ground. Heating with a small stove should also be closer to both sides. Advantages: 1, can reduce and buffer external cold air. 2, to avoid local high temperatures, the chicken dehydration, affecting the uniformity of the flock. v inlet temperature difference Imports include import and export of personnel equipment and air intakes. In general, the air coming in from the air inlet is relatively cool, and it is also most likely to be neglected. Therefore, the respiratory tract of more than 70% of the chickens in clinic is caused by the temperature difference in imports. When the temperature outside the house and the temperature inside the house, there is a temperature difference of more than 10 degrees, the temperature in the house may not be low, but the body temperature of the chicken can not be accepted, so the position of the air inlet should be blocked with a feed bag on the edge of the net Or around the flock of chickens that are susceptible to cold; The personnel's import and export must also have a sufficient temperature for the environment, and within two meters of the entrance, the position of the mesh surface to the ground shall be protected by feed bags or plastic paper. In order to prevent people from entering and leaving the cool breeze and invading. v Day temperature difference Mainly refers to the growth of chickens as they age, changes in their own demand for temperature, and changes in calories generated by the chickens themselves. This process should pay attention to two points: First, the temperature should increase slowly at the same time the temperature should slowly decline, and keep about 20% of the chicken mouth breathing. Second, when the heat generated by the body itself can meet the needs at a later time, do not rush to stop the heating equipment (adequate ventilation may be enhanced) to prevent sudden cooling. v temperature difference Mainly refers to the uniformity of the temperature distribution within the house, and there is no ventilation dead angle, especially in the sheds with a farm size of 8,000 or more. Under normal circumstances, the brooding position is close to the position of the heater, the temperature is always higher, and the position farther away from the heat source (near the fan) is always lower. To make up for this shortcoming, the heat sink can be moved as far back as possible (the blower bag is all dead near the outlet of the furnace and the hot air is transported backwards), but this operation is more costly and sometimes the effect is not ideal. The approach is to produce one or more small furnaces at a location farther away from the heat source when conditions allow. Lung Function Instrument Mouthpiece Lung Function Instrument Mouthpiece,Plastic Disposable Mouthpiece,Medical Paper Mouthpieces,Disposable Paper Mouthpieces Hengshui Qifei Paper Products Co. LTD , https://www.hengshuiqifei.com