As the saying goes: “Slight heat, great heat rise in temperature, feeding and management should be serious, long-term three-volt fish do not miss, to strengthen the feeding to increase the bait; August temperature is high bees, autumn, summer heat in which less fertilizer and more grass, quantity Less time and more to be cautious; Bai Lu, autumn equinox temperature drop, pay close attention to feeding and reduce the amount of fish to promote the body to remind the fish, grass carp eat even longer.†Grasp the production of fish ponds from July to September, is the relationship between The success or failure of fish farming. Normally, July-September is the peak season for fish to feed and grow. It is also an important season for fish to increase production and accumulate nutrition in the future. Therefore, the following aspects must be strengthened in feeding and management: Cast enough food. The bait is mainly concentrated, and the green is supplemented. Concentrates such as fish full-grain pellet feed, bean cakes, cakes, wheat, rice bran, etc., daily feeding amount is 8% to 10% of the stock pond fish. In order to increase the utilization of bait, the number of feedings per day should not be less than 4 times. The bait should be fresh and its size should be appropriate to the size of the fish. Concentrates should be placed in a fixed food field, and various green materials can be placed in floating frames. In summer, the water temperature is high and the weather is changeable. To prevent the fish from floating, it is appropriate to cast more in the morning and at noon. In the evening, cast less and do not eat fish. 2. Rational fertilization. In order to promote the continuous growth and reproduction of the natural food organisms in the fish ponds and improve the natural productivity of the fishing ponds, the summer fishing ponds should maintain a certain amount of fertilizer. Because of the high temperature and rapid changes in water quality, fertilization should be based on the principle of less quantity and more times. Usually, fertilization is applied once every 5 to 7 days. Fertilizer is mainly inorganic fertilizer and photosynthetic bacteria, supplemented by organic fertilizer. Each time nitrogen is applied per mu, phosphate fertilizer is 2 to 4 kg, or photosynthetic bacteria is 10 mg/kg, 50 to 60 kg of pig manure and chicken manure are fully fermented. When the fishing pond is too transparent and the weather is normal, it may be applied in a more appropriate manner; the fishing pond is turbid and when the weather is abnormal, fertilization should be stopped and the water must be changed in time. 3. Adjust the water quality. In summer, the water temperature is high, the food intake of fish is large, and the amount of excrement is large. In addition, the amount of fertilizer used for feeding is large, which can easily cause the lack of oxygen in the fishing pond and affect the growth of fish. The first method of prevention is to increase the water level, keep the depth of the fishing pond more than 2 meters deep, and frequently add new water to increase the dissolved oxygen in the water. The second is to regularly throw lime. Every 1 to 10 days, 1 splash, 15 to 20 kg of lime per acre, clarifying water quality, preventing water quality from aging, and increasing the effect of water on calcium. The third is to install aerators. The aerator has the effect of water agitation, aeration, and oxygenation. When using, according to the actual situation, flexible boot. 4. Prevent floating heads. Usually 3 times a day to watch the pool, that is, at the dawn of observation of fish floating head; at noon check the fish eating and activities; evening check the day of eating and with or without floating head signs. We must always remove the leftover grass and dirt, and weed the pondside to avoid polluting the water and affecting the dissolved oxygen in the water. The high temperature of hot water in the sky, the large amount of fertilizer used for feeding, the amount of organic matter in the water, and the increase of oxygen consumption. The fishes are prone to floating heads due to lack of oxygen, especially during hot nights or thunderstorms. In addition to the regular adjustment of water quality, when it is predicted that a floating head may occur, new water should be added in a timely manner or aerobic machine should be started to increase oxygen, and at the same time stop fertilization and control the amount of food and shorten the time for eating. If serious floating heads are estimated, feeding should be stopped. When the floating head occurs, oxygenation measures should be taken immediately, or yellow muddy water can be added to the pond to add salt water, that is, 10 kg of yellow mud water per acre pond, 10 kg of salt solution added, and the pool splashed after mixing. 5. Wheel catcher. In order to reduce the density of fish, more than 1 kg of cockroach and salmon and more than 1.5 kg of grass carp can be sold from the middle of July to the end of the month. At the same time, 0.1 to 0.20 kilograms of carp seedlings (150 to 200) and summer carp carp (100 to 50 fish) are added per acre pond as a seed for the following year. At the end of August and early September, a group of fish that reached the sale standard were also caught. Fishing should take place in the cool morning. This round of catching and rotating can not only market some fresh fish in the off-season, but also make the fish density more reasonable and make full use of the bait. 6. Comprehensive prevention. Summer is the peak season for fish growth and it is also the peak period of fish disease. There are mainly bleeding, enteritis, gill disease, Chinese sturgeon and so on. Routine management work should be done for bait, tools, and disinfection of pool water. The dietary field was sterilized once every half month with 0.50 mg/kg strong chlorine extract, and the treatment was soaked with 3% saline solution every 20 days for 5 days each course of treatment. Bacterial fish disease and hemorrhagic disease occur. Quanchiposa 0.50 mg/kg strong chlorine extract and 3% fish spirit is taken orally. Parasitism occurs. 0.50 mg/kg 90% crystal trichlorfon Or 0.7 mg/kg of copper sulphate and ferrous sulphate mixture (both with a ratio of 5:2).
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