First, buy fish species
Farmers should correctly distinguish the pros and cons of fish species based on the biological characteristics of the main carp culture species when buying carp fingerlings and avoid being deceived.
Second, the stocking density
In order to reduce the cost of farming, it is best to cultivate large-scale fish species on their own. The use of ponds to cultivate carp fingerlings, stocking carp 0.800 to 12,000 per acre, can achieve the purpose of developing specifications 50 to 60 grams.
When carp adult fish farming is carried out, when the average size of the fish species is 50 to 60 grams, the best 1,500 to 1,800 rearing fish species per acre is ideal, and the commercial fish size can reach 350 to 400 grams.
Third, the mix of varieties
To cultivate large-size catfish species, do not use grass carp and catfish. Instead, choose carp and catfish. The quantity should account for about 20% of the main carp and carp account for about 10% of carp. It is not too early to match the species' stocking time, especially if the fish is used too early to influence the domestication of the catfish.
Fourth, domestication of fingerlings
Squid is a fish living in the lower and middle layers of the water body. It mainly raises the fish ponds of the carp. After the domestication of the fish species, it can reduce feed costs and increase profits. It is relatively easy to domesticate squid during the cultivation of fish species. The domesticated fish species have a short time for catching and eating during adult culture and are easy to manage. Adding appropriate additives in the feed during domestication can shorten the acclimation time and increase the feeding area and quantity of squid. The density is large, the number of groups is large, and it is easy to acclimate. On the contrary, the percentage of long-term domestication and the tendency to catch up and snatch food is low. When the density has been determined to be unchangeable, the water level of the pond can be reduced. If the density is relatively increased, it will not only facilitate domestication, but also increase the pond water temperature and promote fish growth. With squid and squid species, they should be released after the main squid has not formed. The water during the domestication period should be "lean" and not "cloudy."
V. Feed selection
The selection criteria for the size of feed for squid should be “small is not bigâ€. When the size of the common carp is below 10g/tail, the particle size of the feed is 0.50mm; 1.0~10mm for 10~30g/tail; 1.50mm for 30~75g/tail; 2.0mm for 75~100g/tail 150-300 g / tail when selected 2.40 mm; 300 g / tail when selected 3.20 mm.
The feeding capacity of fish is directly affected by the size of the fish and the temperature of the pond water, so the feeding rate should be adjusted according to the actual situation, and should not be the same.
Six, fish disease prevention
Although the disease resistance of carp is strong, in recent years, carp hemorrhagic disease has been found. Although the incidence of this disease is not high, once it is infected and allowed to develop, it will lead to a large number of dead carp. The disease is mainly manifested in the sick carp: floating water (fatigue), pale color, the body surface of the abdomen, the spine on both sides (fine scaly) visible needle parasite parasites. The worms had erythema of mung bean or pea size at the place where they were born, and the scales in the lesions were loose or detached, the mucus increased, and a few formed obvious ulcers. Pathogens are ticks.
Etiology: First, the pond is not completely clear or clear ponds, the pathogens standby abortion; Second, the input into the body surface damage (or production operations caused by carelessness of the fish surface injury) of the species, for the pathogen to create an opportunity to parasites.
Prevention: Sprinkle with 2.50% trichlorfon powder 1 to 2 days before the squid species. A small area of ​​the main pool can be splashed with 90% crystal trichlorfon 0.30 g/m3 per half-month in the onset season; a large-area squid polyculture pool can be used to carry the dipterex insects (bags) during the carp growth season. One or two times a month, each time for two days.
Treatment: In aquaculture, when signs of illness appear, observe and inspect in time. After confirmation, it is possible to spill 0.50 g/m3 of 90% crystal trichlorfon and 0.20 g/m3 of ferrous sulfate mixture at once. For secondary oystercatchers (or ponds that have been repeatedly used with trichlorfon), farms may be killed by using the enemy's enemies to kill the whole pool. The dosage is 6 to 10 milliliters per mus of water.
Pork is a very common meat in life, especially in China. Pork consumption is much higher than other meats and is the main source of meat. Pork tastes and tastes very good, it doesn't get tired when you eat it regularly, and it has a variety of practices. It can be delicious with a variety of ingredients.
Although the pork chop is made of pork, it has no fatty feeling at all, and it is particularly chewy. It is processed through many processes, not to fry or cook pork. The pork that is made out has a lot less oil, and the feeling of eating meat is particularly cool. The authentic pork chop uses the pig's hind leg meat. This part of the meat is mainly lean meat, and the fat is rare. It is more suitable for pork. breast
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