Ways to increase the survival rate of grass carp species

Grass-raising fish or polyculture based on grass carp must maintain fresh water. The main material is green, fine material is used for feeding. Concentrates include bran, beans, and formulated feeds. Summer flowers in the initial period of stocking (15 days) should be fed with some fresh plants, such as duckweed, euphorbia or tender grass pulp. During this period, the grass carp grows very fast, and the body length can increase by 2.5 to 4 times. When the grass carp is up to 10 centimeters in length, some plants and tender land grasses can be thrown. Since then, the type of grass feeding has not been strict. Regardless of the rearing stage of grass carp, it is necessary to achieve "Four Sets." Each morning and evening grass will be shot once, after 8 am and 3 pm. Feeding volume should gradually transition from 20 kg per 10,000 fish to 200 kg. Make sure the feed is fresh, not deteriorating, and pay attention to the green material before you wash it.

The best time to feed the fine material is to be arranged after feeding the green feed. It is advisable to feed the fine material every time you can eat the net. It should not be too much to prevent the grass carp from bulimia and cause enteritis. Special attention should be paid in July, August and September. If fish disease is found, it should be treated as soon as possible.

In the cultivation of first-year fish species, it is the fish disease-prone season. Therefore, special care must be taken to ensure the survival rate. The specific measures are as follows:

1. As the grass carp grows from 2 cm to 10 cm, the herbaceous herb collar is gradually strengthened, so on the feeding, fresh aquatic plants gradually transition to the general aquatic land grass.

2. Flush water in a timely manner. When it was found that the color of the single-cultivated grass ponds was heavy, it indicated that the water was over-fertilized, which affected the development of the grass-fish species, and it was appropriate to flush and flush the freshwater. Mixed grassy fish ponds for other fish, the water quality should not be too fat.

3. Drug prevention. Green feed should be washed or soaked with 6 mg/l bleach for half an hour before feeding. In the food market, copper sulphate and ferrous sulphate should be bagged or bleached to prevent fish disease.

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