Grass carp healthy breeding technology

1. Environment and pond disinfection

Grass carp is most prone to illness. The cultivation of pollution-free grass carp should have a special breeding base and form a certain scale. There is no pollution source around the base. The breeding base should have sufficient water supply and good water quality, meet the "Quality Standard for Freshwater Aquaculture Water for Non-environmental Foods", have smooth water intake and drainage, have no connection between fish ponds, convenient transport of fish, rich feed resources, and good ecological and environmental conditions.

2. Stocking of high quality fish species

In order to maintain good grass carp, healthy and lively quality fish species must be selected. Parents of the self-breeding and self-cultivated fish species should be sourced from certified raw material farms. The seedlings should be cultivated without pollution, and the quality should meet relevant standards. It is good to have good breeds and have the best conditions for self-breeding and self-breeding. For example, the introduction of fish species from other places must be qualified by quarantine. Fish species must be sterilized before putting them in. Chlorine dioxide can be used for 20-40 mg/L every 5-10 minutes, salt for 1%-3% for every 5-20 minutes, and 8 mg/L for every 15-30 minutes. , Potassium permanganate is soaked and disinfected every 10-30 minutes for 10-20 mg/L. The ratio of stocking to fish is 80:20 in stocking mode, that is, the main grass carp accounts for 80%, and the rearing fish (pipa, pupa, pupa, pupa, etc.) account for 20%.

3, scientific feeding

Grass carp mainly takes aquatic plants in natural waters, and in non-polluted aquaculture of ponds, it is suitable to use pellet feeds with scientific ratios to reduce the pollution of residual baits to water quality and fully increase the utilization rate of foods. To produce grass carp pellet feed, a certain amount of grass carp flour should be added, which can reduce the bait cost and meet the demand of special nutrition such as cellulose for grass carp, and promote the growth of grass carp. With the feeding of dry grass, it should be tender, fresh and palatable. Cakes and other types of bait should be free of mildew, no pollution, and no toxicity. After being processed by crushing, soaking, and cooking, they can be used as food for easy feeding and easy digestion. Feeding baits should adhere to the timing, positioning, qualitative, and quantitative principles of feeding, but also to determine a reasonable amount of feeding by observing the weather, water conditions and the amount of fish eaten.

4, reasonable feeding fishery medicine

Fishery drugs are substances used for the prevention and treatment of aquatic animal and plant diseases and insect pests. If they are used improperly, they can easily be left in the fish and cause unqualified fish quality. Therefore, they must be used with caution. Fishery drugs generally include fungicides, insecticides, and water quality improvers. Currently, some traditional fishery drugs have been banned, such as chloramphenicol, furazolidone, sodium pentachlorophenol, malachite green, sulfathiazole, tylosin, quinoline Twenty-two types of fishery drugs such as ethanol, sulfonamides, and insecticidal cockroaches cannot be used in aquaculture. Special attention should be paid when selecting fishery drugs. According to the industry standards promulgated by the Ministry of Agriculture, 26 kinds of fishery drugs that are suitable for use, such as dibromohydantoin, chlorophylline, bleaching powder, calcium chloride, and strong chlorine, are listed, and their use and usage are prescribed. Matters that can be referenced during use.

Roof Repair Tape

RV Roof Sealant Tape, White RV Tape for Camper Trailer Boat Roof Repair Sealing

The roof repair tape is laminated with natural rubber and industrial single side butyl adhesive. It is UV stable, waterproof and airtight. The sealant tape can bonds to virtually any surface quickly and easily. It creates a waterproof airtight barrier with no additional sealing required and remains flexible to temperatures as low as -40ºF making it virtually impossible to thermally shock the seam causing a leak. Besides, white finish also is effective in reflecting sunlight. It won't give a messy asphalt look and ruin the look of your RV roof fixtures.

High coefficient of expansion allows the butyl rubber seal tape to expand or contract to adjust to extreme outdoor temperatures. It can be widely applied in sealing RVs, RV Roof, Metals, Motorhomes, Trailers, Fifth Wheels, Airstreams, Vans, Buses, and more!

Roof Repair Tape,Sealant Tape,Flex Seal Tape,RV Sealant Tape,Butyl Rubber Seal Tape

Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.yuhuanptapes.com