Anti-fish disease in spring pays attention to changes in water quality
Spring is the epidemic season of fish diseases. It is imperative to strengthen the awareness of disease prevention. The following five technical measures are of crucial importance. Efficacy: complete removal of the skin of dirt, with whitening, Blemish effect, but also increase the skin's luster, make skin feel instantly cool.
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1. Pay attention to water quality management. Preventing spring illnesses and nurturing good water quality are critical. 1 Thoroughly disinfect the pond. Detoxification of pathogenic microorganisms is carried out at a depth of 1 m per mu with a lime of 150-200 kg or with 20-25 g of bleach per cubic meter of water. 2 Strictly control the water source and prevent the sewage from flowing into the pond. If necessary, carry out the determination of ammonia chloride and positive water quality for timely adjustment. 3 Observe the changes in the weather, the color of the water, and the activity of the fish. Always add new water. Open aerators to ensure fresh water and adequate dissolved oxygen. (4) Microecological preparations are used to adjust the microecological balance. Nitrifying bacteria, photosynthetic bacteria, sulfurized bacteria, and EM are commonly used.
2. Determine a reasonable stocking density. When deciding stocking densities, the results of stocking and cultivation over the years are important basis. In general, fish grow well, the feed coefficient is not higher than the general level, the number of floating heads is not too large, the fish's constitution is better, and all kinds of fish All can reach the standard of food fish or raise goals, indicating the appropriate density of stocking.
3, a reasonable fertilization. The basal fertilizer is best to use organic fertilizer, and the application time should be early, accounting for about 50-60% of the annual fertilization amount. Before the application of organic fertilizer, it is best to fertilize the fertilizer and then put it into the fish pond after decomposing, so that it will not be polluted. Water quality can be quickly absorbed and utilized by water bodies. At the end of spring, stop applying organic fertilizer, change inorganic fertilizers, and use topdressing fertilizers. When fertilizing, pay attention to the nature of fertilizers, adopt less amount of fertilization methods, and make the water quality “fertile, live, tender, and coolâ€. The transparency is generally 25- 35 cm is appropriate.
4, strengthen the quality of feeding. High-quality bait is the material basis for healthy aquaculture, and specifically: 1 Stopping rotten and deteriorating feed ingredients. 2 When using feed additives, pay attention to the amount of hormones and control them within the safe concentration range. 3 During the process of processing, transportation and storage, prevent bait from deteriorating. Once it is degraded, do not put it into the pond and damage the health of the fish. 4 Develop a scientific feeding plan and adjust the amount of feeding in time according to the actual situation.
5, improve awareness of disease prevention. Spring is the epidemic season of diseases, and it is imperative to strengthen the awareness of disease prevention. Specific measures are: 1 strict disinfection, control the number of pathogenic microorganisms in the pool, cut off the path of foreign pathogenic microorganisms into the water, disinfection can use quicklime, bleach, chlorine dioxide, salt and other chemicals, but also with zeolite powder and other physical methods. 2 Stick to the ponds twice a day, morning and evening, and carefully observe the fish's eating and activities. If any abnormalities are found, take measures as soon as possible. 3 regularly feeding medicine baits. Such as using allicin, Chinese herbal medicine, antibiotics and other mixed feed, in order to enhance its resistance to disease.
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