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Regorafenib Intermediates Regorafenib Hydrate,Regorafenib Intermediates,Cas 755037-03-7 Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com
(A) directly stocking selection of ponds up to 1.5-2.0 meters in water depth, after clearing and then home fish seedlings fertilizer pond, to maintain micro-flowing water. The density of hair ponds is 750,000 per 1000 square meters. Another 2.5 times of water is prepared to raise squid bait fish. At the same time, there is a pond with a density of 1,000 square meters and 10 million tails. Soybean milk is splashed every day. The fish body length is 10-15 days later. About 1.5 cm can be stocked with salmon fry. Per 1,000 square meters, put 3,000 to 4,500 tails of about 3 cm salmon fry, shallow pond, and gradually add water. At this time, the bait fish survival rate is about 40%. At this time, it is necessary to feed the bait fish in a controlled manner so that it grows in synchronization with the catfish, and it is always maintained that its body length is 50%-60% of the body length of the carp. When the bait fish in the carp pond is insufficient, it will be released every 5 days or so. The amount of feeding will depend on the amount of fish on the pond and the satiation of the carp. Change the water once a week, injection of fresh water 2 times. According to the amount of water applied lime disinfectant to keep the water fresh, transparency about 40 cm. The pond is equipped with an aerator, which is turned on for about 1 hour at midday in the hot summer season and starts for about 2 hours in the early morning. Feed the bait fish and turn it on to promote food intake. After more than three months, the survival rate can reach 64%.
(II) Two-tiered stocking directly put in 3 cm larvae to raise the survival rate of squid, generally adopting one-day-old large-size squid species, or using secondary stocking method. The so-called secondary stocking is the first to raise the fry by 20 days or so to form a large-scale fingerling of about 10 cm in size, and then divide it into a large pool to develop a commercial salmon. The specific approach is: (1) to use a mesh or a small area of ​​water near the pond. The size of the net is not so high as bait fish. Small-scale available cages to strengthen the cultivation of large-scale fish species. (2) Hair ponds cultivate bait fish. (3) When the bait fish grows to 1.5 centimeters, 3 centimeters or so of carp seedlings will be placed, and fish will be continuously added. After about 20 days grow into a good fish species of about 10 centimeters after the pond stocking. The stocking density of ponds is 1 tail/m2. After the sub-camp management is mainly oxygen, change the water, add appropriate food bait fish and disease prevention. The survival rate can reach 85%-90%. At the end of the year, 60%-80% of the 0.5 kg/tail commercial carp can be harvested. In addition, smaller size trout and other home fish can also be received.
(c) Pond mud raises fish in adult fish ponds, brood fish ponds, and river ravines. In the polyculture of squid can inhibit the growth of wild fish, change these low-value fish to high-value fish, is conducive to broodstock gonadal development. The size and quantity of carp species should be based on pond conditions such as wild fish, bait fish supply, fish load, water quality, etc. Generally about 3 cm per 1000 m2, about 40 to 60 tails of carp seedlings or 25 to 25 g/tail fish, 15 to 30 tails. The condition of small river ditch can be appropriately increased.
The polyculture pond carp should pay attention to the following issues: (l) Large-sized and over-sized domestic fish of the second-year-old must be carp-reproduced, so as not to affect the production of domestic fish due to ingestion by carp. (2) It is not possible to stock other carnivorous fish at the same time. (3) The broodstock can not be mixed in the adult fish pond, but can be stocked in the broodstock. (4) The production of domestic fish should be appropriately reduced, and water and oxygen must be flushed frequently to avoid the death of the high-yielding fish ponds. (5) In order to increase the yield of carp, appropriate carp, tilapia, broodstock and broodstock with strong fertility should be put in place to increase carp bait and increase the economic benefits per unit of water surface.
Three ways of carp pond culture
Also known as mandarin fish, mandarin fish, seasoned fish, eel fish, sweet-scented osmanthus fish, flower carp, flower wife, saw the mother and so on. In the past, it had been relying on natural waters for fishing, which was far from meeting the market demand, resulting in high prices and low prices. The main conditions for squid farming are high dissolved oxygen, clean water, and fresh live bait with micro-flow and plenty of palatable ingredients.
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