The autumn fish must put on four passes to gain weight.
A fishing proverb says: shell in summer and weight in autumn. The cool autumn season is the peak season for fish growth, so the following four hurdles must be taken care of:
First, turn off good baiting and fertilization.
Generally speaking, the amount of fertilization and feeding from September to November should account for about 30% of the total amount of fertilization and feeding in the whole year. When applying organic fertilizer, it should be a small amount for many times, so as to avoid the floating head of pond fish caused by excessive fertilization; when applying inorganic fertilizer, carbon ammonia 5 kg 7.5 kg per mu or urea 2.5 kg 3.5 kg per mu can be used. After "White Dew", grass resources gradually decreased, and concentrate feed should be given priority to.
Second, keep a good control of water quality. As the temperature drops after autumn, the amount of refined feed in the fish ponds increases relatively, so the water must be changed frequently to keep the fish ponds fresh, fat and unpolluted.
Third, do a good job to prevent the floating head of fish.
For individual fish ponds with high intensive culture density, due to the large amount of fertilizer applied by bait and the high content of organic matter in the water, the oxygen consumption factor increases, so the phenomenon of anoxic floating head is easy to occur. The aerator can be turned on in the evening or early in the morning, or adjusted by adding new water.
Fourth, check the prevention and control of fish diseases.
After "White Dew", although the season of frequent occurrence of fish disease has passed, we should not be negligent. From September to November, fish ponds with a water depth of 1 meter per mu should be sprinkled with 15 kilograms of quicklime every 15 days. 300 grams of bleach can also be used to sterilize fish ponds.
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Discrimination of female and male in brocade carp
After brocade carp grows to adult fish, there is a difference between male and female, and we can distinguish them from head, body shape, abdomen, pectoral fin, anus, spawning movements and so on. 1. The head of the female fish is slightly narrower and longer; the head of the male fish is wide and short, and the forehead is slightly raised. two。 The body of the female fish is short, thick and plump, and the abdomen is enlarged, the closer it is to labor, the more obvious the abdominal swelling is; the male fish is longer and thinner. 3. The tip of the pectoral fin of the female is round and larger; the male.
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Principles and methods of medication for prevention of eel disease-hanging bag method
Also known as hanging basket method. It is to hang medicine bags or baskets around the food field (Taiwan) to form a medicine area, and when Monopterus Albus ingestion enters this area, it can kill the pathogens on the body surface. This method has the advantages of less drug dosage, simple method, no danger and little side effect. But there are also some shortcomings such as not killing pathogens completely. It is generally used to prevent diseases.
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