You need to add something with special fragrance to the feed.
Question 2: What do Penaeus vannamei eat and grow faster at present, and there are still about a few pounds. Which month is the peak season? Of course, the scale culture of Penaeus vannamei eats Penaeus vannamei compound feed, and generally it is prepared by itself if it is raised less, such as wheat and dried corn fish. .....
Shrimp raised in compound feed grows fast, and the size of shrimp depends on the growth cycle. Commercial shrimp is 60-35 pieces a catty. Too large shrimp is not worth large-scale farming, and the risks are more than benefits.
Which month is the peak season of open-air arc growth, which is after the rainy season, the water temperature is not lower than 14 degrees, the solar calendar for greenhouse culture is 3-11month, and the solar calendar for price peak season is 10-May next year.
Question 3: What grass does Penaeus vannamei like to eat? Technical specification for pollution-free Penaeus vannamei culture Provider: Huang Wei Source: Zhejiang Quality Network Release Time: 2006-04-1number of hits: 428 Part 2: Preface to technical specification for pollution-free Penaeus vannamei culture This part is mainly based on national shrimp hygiene standards, toxic and harmful substances, and the safety of fishery drugs. The safety standards of fishery compound feed, the achievements of scientific research and promotion made by Zhejiang Aquatic Technology Extension Station and Zhejiang Freshwater Fisheries Research Institute for many years, the practical experience of scientific research and aquaculture production of Penaeus vannamei in the province, the research results from outside the province, and the reference to industrial standards such as technical specifications for pollution-free aquaculture of crustaceans such as prawns and river crabs. The pollution-free Litopenaeus vannamei DB33/T399 is divided into three parts: Part I: technical specifications for fry production-Part II: technical specifications for aquaculture-Part III: product quality standards. This part is divided into the second part of DB33/T399. Appendices A and B of this part are normative appendices. This part is put forward and centralized by Zhejiang Ocean and Fisheries Bureau. Drafting units of this standard: Zhejiang Aquatic Technology Extension Station and Zhejiang Freshwater Fisheries Research Institute. The main drafters of this standard: Du Jianming, He Zhongyang, Zhang Yufei, Zhang Qunjie 1 Scope This part specifies the production environment of PenaeusvannameiBooen, preparation for shrimp stocking, shrimp stocking, feeding management, water quality management, disease control, daily management, catching and other technologies. This part is applicable to pond culture of Penaeus vannamei, and other culture methods can be referred to. 2 normative reference documents The clauses in the following documents become the clauses in this part through the reference in this part. For dated cited documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, all parties who reach an agreement according to this part are encouraged to study whether the latest versions of these documents can be used. For undated reference documents, the latest version is applicable to this part. GB 1 1607 fishery water quality standard GB 13078 feed hygiene standard GB/T 18407.4 safety and quality of agricultural products, environmental requirements for producing areas of pollution-free aquatic products NY505 1 Pollution-free food freshwater aquaculture water quality NY5052 Pollution-free food seawater aquaculture water quality NY5070 Fishery drug residues in pollution-free food aquatic products * * NY5071Guidelines for the use of pollution-free food fishery drugs NY5072 Pollution-free food fishery compound feed safety *** 3 Environment and facilities 3. 1 Coastal areas with electricity, water supply, convenient transportation, pollution-free environment and less silt in the production area. The environment of origin shall meet the requirements of GB/T 18407.4. The water source shall conform to the provisions of GB 1 1607, the seawater quality shall conform to the provisions of NY5052, and the salty and fresh water quality shall conform to the provisions of NY505 1. 3.2 Facilities 3.2. 1 culture pond 3.2. 1. 1 freshwater pond area is 0.1hm2 ~1.0hm2, which is square or rectangular, and the water depth is above1.2m. Loam or sandy soil bottom, the bottom of the pool is flat and watertight. Water inlet and drainage facilities are set at both ends of the pool. 3.2. 1.2 Seawater Ponds It is advisable to build shrimp ponds in the intertidal zone in the coastal areas, which should be built in the standard seawall once every 50 years. The suitable area is 0.3 hm2 ~ 2.0 hm2, which is square or rectangular, and the beach depth is more than1.0m. The bottom of the pool is flat, slightly inclined to the drain, with a gradient of about 0.2%. The bottom of the pool is watertight, and anti-leakage materials should be added if necessary. Water inlet and drainage facilities are set at both ends of the pool. It is best to have fresh water sources nearby. High-density intensive culture ponds are divided into argillaceous ponds and cement ponds. The argillaceous ponds need slope protection, with an area of1300m2 ~ 3500m2. The cement ponds are square or round, with a generally small area, depending on the actual situation, and the water depth is generally1.5m ~ 2.0m.. 3.2.2 Supporting facilities for cultivating pond 3.2.2. 1 Reservoir The reservoir should be completely drained, and the water capacity should be more than one fifth of the total cultivated water body. The wastewater treatment pond in 3.2.2.2 adopts the method of circulating water cultivation, and the water discharged from the cultivation pond must be purified before it can be recycled. The wastewater from the cultivation pond should be purified by the treatment pond before it can be discharged without using the circulating water cultivation method. The water inlet and drainage facilities in 3.2.2.3 are located in large-scale shrimp culture areas, so it is necessary to build independent water inlet and drainage channels to coordinate the water inlet and drainage of shrimp farms and ponds. The water inlet and outlet should be as far away as possible. The width of the drainage channel should be larger than the intake channel, and the bottom of the drainage channel should be more than 30cm below the bottom of each corresponding shrimp drainage gate. 3.2.2......> >
Question 4: What are the worms eaten by Penaeus vannamei 1? The best one is Tenebrio molitor, which is eaten by Penaeus vannamei in the seedling stage. The effect is very good, but the price is a little expensive. Cultivation method: pour Tenebrio molitor eggs into the water temperature above 25℃ from the iron pot, and after the worms hatch for 24 hours, take them out with a 200-mesh drying tray and put them into the shrimp pond (generally used for freshwater shrimp culture, the cost of seawater is high, so it is not recommended to be practical);
2. Daphnia, also known as red worm, can be seen by the naked eye. Cultivation method: fertilize with mixed compost (livestock manure) to make bacteria and algae multiply in large quantities, and then directly enter the pool;
3, rotifer, with the characteristics of fast growth and strong reproduction, its size, swimming speed and nutritional value are very suitable as an open feed. Cultivation method: using chicken manure to cultivate;
4. Artemia and its nauplii, referring to Tenebrio molitor, can be eaten by prawns after they grow into adults.
Culturing worms can be used as an auxiliary material for Penaeus vannamei. Remember: putting special prawn feed is the key to successful culture. Especially in freshwater Penaeus vannamei culture, it is not easy to cultivate insects. Try to use feed as much as possible, and then consider cultivating insects when the technology is mature and controllable. After all, biological bait can't save much cost.
Question 5: What do prawns like to eat or what flavor creatures are rotifers, copepods and cladocera? If they want to feed, they need to add something with special flavor.
Question 6: What do nauplii of Penaeus vannamei eat? Eggs and larvae of Penaeus vannamei have to go through three stages: nauplii and mysis larvae. 2, 33*** About 8 larvae are seen.
Question 7: What do some prawns (also called prawns) eat (can they eat rice grains)? What should be paid attention to in the process of raising? Buy aquatic plants at 40 cents, have a private chat with a special person, and have small fish.