Deepening the water level When the temperature reaches around 35°C, it indicates that the high temperature season has arrived. At this time, pool water should be added to the deepest part of the year. During the hot season, the suitable maximum water level can be maintained between 1.2m and 1.5m. In the southern region where Liao crabs are cultivated, Liao crab is not suitable for the aquaculture environment and the water level should be deepened, preferably around 2 meters.
During the period of high temperature regulation, the crab pool should be replaced with fresh water to ensure good water quality. The water source for replacement should be fresh, clean, and free of pollution. Do not replace the field water, industrial waste water, and domestic sewage that have been treated with pesticides into crab ponds. The time for changing the water can not be carried out when the noon is hot, generally changing the water when the early and late weather is cool. Normally the water can be changed every other day. When the water temperature exceeds 28°C, it is best to change the water once a day. The amount of water exchanged should not exceed 1/3 of the original pool water.
Diligent fishing ponds and ponds to raise crabs, because the natural growth of plants in the pool is generally very small, you can go to the wild river ditch or waste water to get fresh plants into the pool, you can also artificially plant plants, so that the pool crab feeding, habitat, but also shade Summer, reduce water temperature. The sinking water, floating water, and high-water plants in the pool each account for a certain proportion, and the total grass surface coverage should be controlled at about 1/3, so as to leave more space for the crabs to move freely. The types of aquatic plants include Xiaoqingping, Hydrilla verticillata, and water peanuts. During the high temperature period, the aquatic weeds will rot for a long period of time, and we should adhere to the principle of less groundless fishing. It was found that the aquatic plants were not fresh, the grass blades were yellow, and the stalks were soft and should be removed to prevent their decay and damage the water quality.
In the season of high temperature, except for the high water temperature at noon, the crabs in the water and in the bottom of the water and grass, both in the morning and in the evening, when the weather is cool, they usually come out for activities, foraging, and they eat more food. At this time, sufficient food supply should be ensured to promote the growth of crabs. Feeding of bait should adhere to the reasonable mix of animal and vegetable feeds to ensure the overall demand of nutrition for crabs, and avoid bait-feeding with single species and nutrition. Can be fed melon slices, leaves, rice buds, aquatic plants, cooked corn, wheat and other plant-based feed, with the feeding of small trash fish, snail meat animal food, the best feeding of crab grain feed. No matter what kind of feed, it should adhere to the principle of freshness, deliciousness, and quantity. It is better to observe the slightest surplus within 2 hours to 4 hours. The specific standard should be about 8% of the body weight of the crab. Ultimately, it should be adjusted flexibly according to weather, water quality, crab pond conditions, etc. Feeding time is good for morning and evening, and the feeding place can be in the water grass and the place where the water temperature is lower.
Pay attention to the high temperature season of disease prevention, the crab pond water temperature is high, the water quality is easily deteriorated, and the crab body is weak in disease resistance. Attention should be paid to the prevention of crab disease. If the water body is found to be turbid and there is more dirt, alum, quicklime, etc. can be used to purify the water and clarify the water body. You should occasionally use bleach, aquarium, crab and other drugs to spill water to kill bacteria and parasites. When feeding, it is often necessary to use oxytetracycline, furazolidone, raw garlic and other drugs to feed the bait, which can effectively prevent the occurrence of crab disease. Found dead crabs should be immediately removed, and find out the reasons to take measures to prevent the spread of crab disease.
For the treatment of diseases of the respiratory system:
Diseases and conditions of the respiratory system fall into two categories: Viruses such as influenza, bacterial pneumonia and the new enterovirus respiratory virus that has been diagnosed in children; and chronic diseases, such as asthma and chronic obstructive pulmonary disease (COPD). According to Dr. Neal Chaisson, who practices pulmonary medicine at the Cleveland Clinic, there is not much that can be done for viral infections but to let them run their course. "Antibiotics are not effective in treating viruses and the best thing to do is just rest," he said.
COPD is the intersection of three related conditions - chronic bronchitis, chronic asthma and emphysema, Chaisson told Live Science. It is a progressive disease that makes it increasingly difficult for sufferers to breath.
Asthma is a chronic inflammation of the lung airways that causes coughing, wheezing, chest tightness or shortness of breath, according to Tonya Winders, president of the Allergy & Asthma Network. These signs and symptoms may be worse when a person is exposed to their triggers, which can include air pollution, tobacco smoke, factory fumes, cleaning solvents, infections, pollens, foods, cold air, exercise, chemicals and medications.
Lung cancer is often associated with smoking, but the disease can affect non-smokers as well. Every year, about 16,000 to 24,000 Americans die of lung cancer, even though they have never smoked, according to the American Cancer Society. Like all cancers, lung cancer is caused by the uncontrolled growth of abnormal cells.
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