This year's dog days ended on July 13 and ended on August 22 for a total of 40 days, 10 days more than last year. In summer, it is the most severe "bake test" for poultry every year. In order to prevent the impact of heat stress on the performance of breeding poultry, we can start from the aspects of sun protection, cooling and ventilation, increase drinking water, add anti-stress drugs, and adjust the feeding time.
1. It's the same principle of sun protection on poultry farms. For open coops and duck houses, shade canopies or shade nets can be installed at the playground to avoid direct sunlight, and the roof of the birdhouse can be painted white to increase the reflection of sunlight and reduce the temperature inside the house.
2. Spray water, open the fan In addition to reducing direct sunlight, for waterfowl, you can also spray cold water on the roof, around the duck house, and in the duck house to evaporate heat and reduce the temperature in the duck house. Zhong Hongyi, the technical director of Anhui Qiangying Duck Industry Co., Ltd., introduced cool water to the duck house at 2 and 7 o'clock every afternoon, and the cooling effect was very obvious. However, spraying water at the same time must also use the ceiling fan, fan and other equipment to increase convection ventilation, otherwise the high humidity inside the house will also aggravate the adverse effects of high temperature.
3. Drink plenty of water and promote heat dissipation Studies have shown that for every 20% increase in drinking water, poultry can increase their heat output by 30%. Zhong Hongyi said that 80% of body heat is distributed through evaporation during heat stress, and it is necessary to try to stimulate poultry drinking water to ensure sufficient drinking water. However, drinking water must be clean and it is best to cool deep well water. In addition, adding citric acid and electrolytes (such as potassium chloride, ammonium chloride, and sodium bicarbonate) to drinking water can stimulate drinking water.
4. Energy intake in summer poultry will appear different degrees of decline, this time should be an appropriate increase in dietary energy ratio, reduce the dietary protein content in order to facilitate digestion (a decrease of about 0.5%). The ideal way to increase energy levels in feed is to increase fat. On the one hand, it improves the palatability of the feed and on the other hand it also increases the brightness of eggshells of egg-laying poultry.
5. Addition of multi-dimensional and appropriate increase in VC, VE, and baking soda can effectively alleviate the heat stress response. When baking soda is added, it is preferably 500 to 1000 grams per ton of feed. In addition, some other anti-heat stress additives, such as Bacitracin zinc, acidifying agents fumaric acid, glucose, enzyme preparations, betaine, etc. have a good effect on improving the level of heat stress resistance. Some Chinese herbal medicines, such as Houttuynia cordata, Daqingye, Banlangen, etc., can be used as appropriate.
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