It is a trick to improve ventilation and defecation to improve the environment In the face of this high temperature and high humidity weather, teacher Bai Yongqiang suggested that the chicken farms should be equipped with large ventilation fans and water curtain cooling devices. In such weather, artificially increasing air circulation is the recommended method. When cooling the house and chicken body with water fog, Mr. Bai Yongqiang emphasized: “Be sure to do a good job of ventilation, otherwise the increase in humidity may cause more stress on the chickens.†Improve hardware facilities In the high temperature environment, there are two ways to quickly and effectively reduce the thermal stress of laying hens. One is to increase the wind speed inside the house and the other is to increase the evaporation rate. The combination of these two methods will achieve the desired cooling effect. The specific measure is to set the air inlet and exhaust outlet opposite to each other in the longitudinal direction of the chicken house, and the air inlet should not be excessively dispersed. The area of ​​the air inlet should be 1.5-2 times that of the air outlet. Install the wet curtain at the air inlet and install the air outlet. The number and power of exhaust fans and exhaust fans are calculated according to the space of the house, ensuring that the ventilation in the wet curtain house reaches 1.8-2.4 m/s. This combination of the two can reduce the temperature in the house by 3-5°C. Take water mist to cool In hot weather, when the temperature in the house exceeds 30°C, cold water with disinfectant can be sprayed to reduce the temperature in the house, or it can only be applied to the cob spray. In addition, when the heat stress is severe, a more effective method is selected. The highest temperature of 8 hours a day, each bird's feather water spray 80-100 ml every one hour, can increase the egg production by 5.11%. The cooling of the water mist must be enhanced ventilation, otherwise the humidity of the house is too large, but it intensifies the heat stress and the breeding of pathogens. Clean the chicken house in time During the high temperature and high humidity season, chicken manure fermentation will speed up and the release of harmful gases such as carbon dioxide, hydrogen sulfide, and ammonia will be accelerated. Therefore, it is necessary to remove the excrement in time to eliminate mosquitoes and flies, and to strengthen the disinfection of chickens in order to reduce harmful gases on the respiratory tract. The stimulation and damage. Decreased feed intake increases nutrient concentration is a countermeasure In the heat stress environment, the chicken needs to have enough nutritional supplements to maintain normal physiology and production, and when the ambient temperature exceeds 27°C, the feed intake of laying hens will decrease as the temperature rises. In order to resolve this contradiction, Teacher Bai pointed out that it is necessary to adjust feed nutrition and increase nutrient concentration according to the feed intake of chickens, so as to make up for the lack of energy, crude protein, minerals and multivitamin intake of heat stress. Energy concentration adjustment The reduction in heat stress feed intake in laying hens results in insufficient energy intake. A large number of studies have shown that increasing energy content in feed can improve the production of heat-stressed poultry. At present, a more ideal way to increase the energy in feeds is to use fat instead of carbohydrates, because the low calorific production of fat can increase the retention of energy in the body. At the same time, fat can change the palatability of feed and prolong the feed in the digestive tract. The residence time thus increases the feed intake and digestive absorption of the layer. The amount of fat added to the feed during heat stress is 2%-3%, but fat is easily oxidized and degraded, so ethoxyquin antioxidant should be added at the same time. Protein and Amino Acid adjustment In heat stress, the traditional way is to increase the content of crude protein in feed to maintain the lack of protein intake of laying hens, but protein metabolism generates much more calories than carbohydrates and fats, which increases the accumulation of metabolic heat in the body. Therefore, adding protein not only increases the cost of feeding, but also aggravates heat stress to some extent. At present, many nutritionists advocate using amino acids instead of proteins. Amino acids can be absorbed directly into the body without having to be decomposed by proteases in the intestine, which can reduce the burden of heat-stress-damaged intestines and can quickly Supplement the body. However, the study of amino acid addition to heat stress has just started. There is no mature addition scheme. Some studies have found that methionine and lysine can relieve heat stress. They are two basic amino acids that must be added. Their amount is generally daily. Methionine 360 ​​mg, lysine 720 mg. Adjustment of minerals and vitamins Heat stress can affect the quality of the shell (thinning and brittleness of the eggshell), which is due to the decrease in glycogenase and vitamin D activity in the hen's uterus, which is also an important reason. In order to ensure that chickens consume at least 3.5g of calcium per day, the calcium content in the feed can be increased to 4%, but the ratio of calcium to phosphorus should be kept at 4:1, and more than 50% of the total calcium should be source of particulate calcium. Heat stress causes increased release of aldosterone in laying hens. Aldosterone has the function of sodium retention and excretion of potassium. As a result, serum potassium is reduced. Potassium ion concentration can be increased by adding potassium chloride. Generally, the concentration of potassium chloride added is 0.15%-0.30%. . In addition, heat stress, or the absorption of manganese, sulfur, strontium, cobalt, and manganese ions, or the increase in their demand, should be increased in feed content in accordance with the reduction in dietary intake. There are many reports about increasing the amount of vitamins. The study reported that heat stress does not affect the absolute intake of vitamin A, whereas vitamin E, vitamin C, and B vitamins have large changes, and the added amount can be adjusted to 2-3 times the normal amount. . Vitamin C is the most important vitamin in heat stress, and its function can inhibit poultry body temperature rise, increase feed intake, and also promote recovery of damaged tissue cells. High temperatures can inhibit self vitamin C synthesis in laying hens and require additional compensation. 150-200 mg/kg can be added to drinking water. Adjust daily management to increase efficiency in hot environment In the daily management of laying hens, farmers can make appropriate adjustments according to the actual situation. Teacher Bai Yongqiang said: “After the temperature rises, the feed intake of layer will decrease. For this reason, we can adjust the feeding time and lighting time, and at the same time reduce the temperature of the chicken by lowering the drinking water temperature. This method is simple and easy. OK, everyone may wish to try." Feeding times and times Feeding time should be advanced and delayed, that is, when the temperature is low in the early morning and early evening. A hunger strike for 2-5 hours at noon in the afternoon at the highest temperature can cause hunger hunger in order to stimulate the feeding center of the hypothalamus and increase feed intake during feeding. In high-temperature and high-humidity environments, feeds are more likely to degenerate and acidify, reduce palatability, and at the same time the feed intake of the flock is reduced and leftovers are often prone to occur. Therefore, the number of feedings should be increased so that less feeding is done. Pay attention to drinking water management In a hot environment, the best way to make full use of the ability to evaporate heat and increase the heat emitted by each breath is to increase the amount of drinking water and reduce the temperature of drinking water. The temperature of drinking water should not exceed 28°C. A low-cost, highly-feasible method is to use deep well water. If the local water quality fails to meet drinking standards, ice cubes can be added to the water to lower the temperature of the drinking water. At the same time pay more attention to water quality. Due to hot wheezing in chickens, the respiratory mucosa is often damaged and the chance of invading pathogens increases. In drinking water, disinfectants suitable for drinking water disinfection, such as OUFU-SP, can be added to purify drinking water. Adjust lighting plan A stable and scientific lighting program is an important factor to ensure the high yield of laying hens. In order to solve the drop in feed intake during the hot season, it is possible to give 2-3 hours of light when the weather is cool at 0-3 in the morning without changing the light intensity and time. Improve egg quality and reduce death caused by heat stress. The pathogenic microorganisms are suitable for breeding for prevention and health care In summer, it is suitable for breeding of various pathogenic microorganisms and parasites, combined with the stress of high temperature and high humidity, resulting in weakening of the body's resistance to diseases, which is a frequent season of chicken common diseases. Professor Bai Yongqiang suggested: We must strictly follow the epidemic procedures and do a good job of vaccine immunity. It is best to add electrolysis multidimensional and microelements in feed and drinking water for preventive and health-care use. Only by improving the constitution of the chicken can we reduce it. The incidence rate and aquaculture efficiency can be reliably guaranteed. Epidemic prevention It is necessary to do a good job of prevention and epidemic prevention. In addition, vaccines such as chicken Newcastle disease, cholera, and chicken gizzards should be injected on time, and chicken houses should be regularly sterilized to cut off the route of transmission of pathogens. Every 7-10 days with anti-toxic alkali, Lysol and other disinfection once during the onset of disinfection once a day. To regularly add appropriate antibiotics in the feed, such as oxytetracycline, ciprofloxacin, norfloxacin, can enhance the body's resistance to disease. Anti-mosquito, rodent pests, locusts and other summers are frequent and active in the summer. Attention should be paid to the effective killing of pests and diseases to prevent their spread. For large-scale chicken farms, it is advisable to hire professional rodent control companies. Health medication At present, there are many anti-stress drugs on the market. Most of them consist of electrolytes, sedatives, antibiotics, vitamins, and Chinese herbal medicines. The mechanism of action is generally to regulate heat-induced stress-induced acid-base balance disorder, impaired nutrition metabolism, and improve production performance. The body's sensitivity to stress. If the chicken is found to have only the symptoms of heat stroke, such as the chicken's rapid mouth breathing, phlegm, body temperature rise to 45-46 °C, palpation of high-heat burning hand and so on. To take medication in time and take measures: 1. Properly reduce the breeding density, improve the ventilation of poultry houses, and increase the cooling water spray, spray, water curtain and so on. 2. Appropriate supply of adequate drinking water and appropriate amount of heat-clearing Chinese herbal medicine (such as Prunella, reed rhizome, Rhizoma Coptidis, etc.) and vitamin C. 3. Strictly sterilize eggs and hatching equipment to keep the brooding room clean and sanitary. Feed cephalosporins and feed for 3 days. During treatment, diseased chickens were singled out and injected with intramuscular injection of penicillin at a rate of 10,000 units each. The whole group used 0.1% thiamphenicol and twice the amount of multi-dimensional spices, drinking water plus 5% glucose, and fed 3 days. Antimicrobial agents,Trimethoprim Lactate Salt Powder,Bulk Menadione Powder,Sulfadimidine Sodium Powder,
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