Summer is the key season for astragalus cultivation. How to do a good job in temperature regulation, dissolved oxygen regulation, bait management, and other measures to ensure the safety of summer in summer is the key to obtain high efficiency. Summer astragalus cultivation must seize the following key links: Summer cooling. The maximum adaptation limit of jaundice to high temperature does not exceed 28°C. It is very easy to increase the temperature of the pool water quickly in the summer sun exposure, and even cause the hot summer to become hot. Therefore, it is very important to manually control the water temperature. The common method is to hang out on the Dianchi Lake. Planting grapes, sponge gourds, lentils and other climbing plants to protect the sun from the heat; if these plants are not planted, they can also be covered with straw or shade nets, etc. When the temperature is high, cover the Internet, cloudy or rainy days. Can open shading net. Some plants such as duckweed, water lotus, and water hyacinth can also be cultivated in Dianchi Lake to cool heat and keep the temperature of the Dianchi Lake relatively stable. This will provide a sheltered environment for Oystercatcher, and it will be beneficial for the Astragalus to breathe and foraging out of the hole. However, please note that the area covered by aquatic plants should be controlled to less than half of the water area. Control the water quality of Dianchi Lake. One is to adjust the pH of the pool water. For the culture of Astragalus, the pH of the pool water should be controlled at 7-8. In the summer, the water in the Dianchi Lake tends to become acidic, and it is easy to breed pathogenic microorganisms in the acidic environment, making the Scutellaria more susceptible to diseases. If it is found that the pool water is acidic for a long time, ie, the pH is less than 7, the lime water or ash soaking solution shall be promptly poured into the pool for adjustment. The second is to prevent the lack of oxygen in Dianchi Lake. High-density cultivation in summer in high temperature conditions, it is easy to cause hypoxia, should take timely measures to supplement oxygen, the method is to promptly inject new water, rely on the water flow into the oxygen to ease; Care of the water on the plants, due to water photosynthesis, It can play a positive role in increasing the dissolved oxygen in Dianchi Lake; it can also use chemical oxygenizer calcium peroxide, and use bamboo sticks or sticks to make holes from the ditch to the bottom of the pool, and put 1 to 2 grams of calcium peroxide per hole. Then use mud to plug it and make about 10 holes per square meter. Apply it once a year. Calcium peroxide can increase oxygen from the mud. If the pool water is likely to reach 28°C, the pool water should be deepened to 20-25cm, and the pool water should be updated to balance the temperature, but it should be noted that changing the water can only replace one-third of the pool water, and the difference between the temperature of the new water and the pool water is not More than 3 °C, so as not to cause jaundice colds. Science feeding. Feeding in summer must be on time, maintaining good behavior and eating habits. As far as possible, invest in fresh animal protein diets such as fresh maggots, fly maggots, and snail meat, and avoid feeding rot and odor-resolving foods to prevent jaundice from infecting gastrointestinal diseases. The best time to change the level of feeding on the 1st for 2 times a day, respectively, in the morning before 9 o'clock in the afternoon and after 6 o'clock in the cooler period of feeding, the amount of the standard to eat on the day of the yellow eel is appropriate. In case of bad weather, the food intake of Astragalus membranaceus should be reduced, and appropriate feeding should be done less often. Normally, the food should be eaten on the same day. If there are residual baits should be cleared in time to avoid pollution of water quality. Prevent yellow head floating head. In case of thunderstorms or severe deterioration of water quality during hot weather, rainy days or early evening, if the fishes are found to be beating, clustering, and swimming in the morning and evening, this is a severe lack of oxygen and symptoms of floating heads. The growth is extremely unfavorable and measures must be taken promptly. For light floating heads, simply inject fresh water into the air to solve the problem. However, do not fill the water in the evening to prevent aggravation of the floating head caused by convection. Difficult to detect the dark floating head, occurred in the summer and early autumn, if not timely water injection prevention, prone to pan dead fish, due to mild symptoms, generally difficult to find, once discovered should be promptly injected new oxygen, relieve symptoms. Pay attention to escape. Experienced farmers know that Huang Ji’s ability to escape is high. Even though the rear wall of the rearing pond is high, dozens of squid will gather at the corner of the pool wall. The head is attached to the wall, and the tail protrudes outside the wall to escape. Summer thunderstorms and storms made the yellow cymbals jump up and down. They were restless, and they couldn't escape if they didn’t pay attention. Therefore, special attention should be paid to the observation of changes in weather, check the depth of the water level, whether the pool bottom cracks and whether the drain hole net cover is in good condition, and eliminate hidden dangers in time, blocking the way of escape of the jaundice. COVID-19 Coronavirus Rapid Test Kit Anesthesia Medical Co., Ltd. , http://www.sinoanesthesia.com