The quality of fish feed determines the key reasons for fish growth
Satisfy fish nutrition, ensure feed quality, and effectively promote the rapid growth of quality fish species in high water quality environments.
Fish in the newly hatched larvae are mostly bait in the water plankton, especially zooplankton. Breeding water quality at this stage and breeding enough plankton for larvae feeding is essential for improving the survival rate of larvae. As the fish continued to grow and develop, entering the fish species stage, the feeding performance changed and differentiated.
Grass carp and head lice, the larvae stage takes zooplankton as the main feeding object, and transitions to omnivorous at the stage of juvenile fish (fish species). With the continuous improvement of the development of the digestive system, when the grass carp is 7 to 10 cm long and the head is 4 to 5 cm, it turns to herbivore, that is, the aquatic higher plants are the main bait. Grass carp enjoys the rotella spirulina, Malay eye dish, bitter grass, etc.; the head scorpion is fond of the spirulina, bitter grass, especially the young leaves of aquatic vascular plants. Under the feeding conditions, these two kinds of fish can ingest the rhizome of terrestrial plants, bean cake, rapeseed cake, cottonseed cake, rice bran, wheat bran, barley, corn, fish meal, etc., and also like artificial feed.
Salmon and trout are typical fish that filter plankton. In addition, they can also filter organic humus and bacteria. Under the feeding conditions, artificially fed feeds such as bean cake, rapeseed cake, bean dregs, wheat bran, fish meal and artificial granule feed can also be taken, and soy milk and straw pulp can also be taken.
Herring, juveniles mainly feed on zooplankton, and begin to feed on small snails and mites when they are 15 cm long. The food composition of adult fish is almost entirely mollusks, benthic shrimps, aquatic insects and larvae. Under the feeding conditions, the snails feed on snails, snails and various kinds of cakes, silkworm pupa, bran, grain and prepared pellets. However, it is a carnivorous fish. When preparing pelleted feed, it must contain an appropriate amount of animal feed such as fish meal, silkworm cocoon powder, blood meal, etc., and the crude protein content is required to be 35% to 40%.
Carp, in the natural waters, animal feeds as the main feeding object, mainly including mosquito larvae, snails, river otters and other benthic animals, aquatic insects and shrimps, but also eat seeds, shoots and plants of higher aquatic plants. Chips. Under the feeding conditions, the squid can eat a variety of commercial feeds and compound feeds, but the requirements for crude protein in the feed are higher than grass carp, group head lice, 32% to 38%, and animal protein should account for a sufficient proportion.
Carp and silver carp, usually based on plant-based bait, such as water grass, diatoms, filamentous algae, organic debris, etc., also snails, chironomid larvae, otters, cladocerans and copepods.
Carp, which is a carnivorous fish, likes to eat small fish, shrimp, crab, snail, scorpion, scorpion, rotifer, aquatic insects and dead bodies of terrestrial animals. The feeding habits of squid have obvious stages: the larvae of white larvae mainly feed on larvae of rotifers, leeches, leeches, aquatic insects, and also eat shellfish and organic debris. Cubs weighing 5 grams begin to chase fishing stocks, shrimps or bite all kinds of animal carcasses. Under the feeding conditions, the larvae are mainly fed with leeches. In other periods, tilapia and compound feed can be fed, and the seed and adult stages are mainly fed to the compound feed.
Industrial sectional doors are the most durable and longest lasting doors to ensure circulation at the areas of the factory entrance and exit of goods, loading and unloading areas.
The body of sectional door is forming by 40 mm sandwich panels. These panels provides sound and heat insulation due to the intense doped polyurethane insulation was injected between galvanized steel sheet. (50 kg/m3).
Industrial sectional door systems provide space-saving with opening parallel to the ceiling.Any opening can be used clearly . and produces in accordance with the transition range and the height in the factory buildings or warehouses.
Doors is working sliding by be the most appropriate the gap between the top level of the gate with a ceiling height within the side rasils. The door can be mounted in different ways according to the gap distance (standard, low, highlift and vertical track systems).
Industrial sectional doors can easily be opened automaticly by 230-380 V-AC/50 Hz electric motor or manualy thanks to torsion spring system that balances the weight of the door.The galvanized springs are made to be durable of 25.000 door cycles.Motor with emergency chain All the drive systems have a mechanical back-up system fitted to the reduction gearbox of the electric motor, so that the sectional door can be opened if the power fails. The reduction gearbox can then be powered using the chain.
Industrial Sectional Door,Industrial Overhead Sectional Door,Industrial Warehouse Sectional Door,Industrial Garage Interior Sectional Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfrollershutterdoor.com