Reduction of feed cost method for Penaeus vannamei

The feed cost accounts for about 70% of the cost of white shrimp culture in South America. Therefore, reducing the feed cost and rationally saving the feed in the culture are important ways to obtain better benefits for the culture of Penaeus vannamei.
The feedstuffs were selected to use the special feeds for Penaeus vannamei produced by regular manufacturers, instead of using other shrimp feeds instead. Pay attention to fertilization in the early stage of cultivation to cultivate biological communities that are beneficial to shrimp growth, such as benthic organisms and plankton. And transplant some beneficial feed organisms into the pool to reduce feed intake. With the consumption of basal feeds, some clean and sterile live feeds and special compound feeds for larvae can be fed, and then gradually transition to feeds for Penaeus vannamei.
Maintaining good water quality and water quality, South American white shrimp grows rapidly and has fewer diseases. It can make full use of feed and reduce the feed coefficient. The water quality is yellow-green, with a transparency of 30-40 cm, and dissolved oxygen of 4 mg/l. The commonly used methods of water quality regulation are: Change the water level frequently, generally change the water every 7 to 10 days, each time changing 10% to 20%; every 10 to 15 days, use 15g of lime slurry in the Quanchiposa once per cubic meter; use biological Preparations, such as photosynthetic bacteria, Bacillus, etc. to regulate water quality; installing aerators, etc.
Clearing the wild fish pond, mixed fish, and mixed shrimp will compete with South American white shrimp for feeding and even eat white shrimp, which should be removed. The method of clearing is to inject water 20-30 centimeters before transplanting seedlings, clearing the pond with 150 kg of lime per acre. Use a filter bag when entering the water to prevent wild fish and shrimp from entering the pool with water.
The feeding technique is a small number of times. According to the shrimp's feeding habits and growth characteristics, adhere to the principle of small number of times. Feeding at different times is also different. Generally, 70% of the feed is given at 30% in the morning, 10% at 11PM, 40% at 18PM, and 20% at 23PM. The second is to grasp the appropriate amount of feeding. The amount of feeding is more difficult to control, too much will cause feed wastage, too little shrimp is not enough to eat, is not conducive to growth. A more practical and feasible method is to set up a food table, set a few food tables around 1 square meter around the pool, spread evenly when feeding, and inspect the feeding conditions of shrimp after 1.5 to 2 hours of feeding. The third is feeding according to the weather conditions. When the weather is clear, the wind and the warm days are fed, the weather is hot and the weather is hot or cold. The fourth is to feed according to shrimp conditions. Prawns grow vigorously and are fed properly when there is no disease, but they are fed less when they are fed. When shrimps are husked, they are fed less, and they are fed more than one day after shelling.


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