Feed Saving method of raising Penaeus vannamei

Pellet formula feed is generally used in the culture of Penaeus vannamei. Because this kind of feed is sold at a high price (usually 4000 million yuan / ton), the feed cost is its main expenditure, which generally accounts for more than 70%. Therefore, saving feed reasonably and reducing feed coefficient is an important way to obtain better economic benefits in culture of Penaeus vannamei.

First, get rid of wild miscellaneous fish and reduce the number of people fighting for food.

There are more wild miscellaneous fish and shrimp in the pond, and low-quality fish and shrimp compete for feed, which will reduce the feed utilization rate, so attention should be paid to its removal. The method is to release the seedling forward water 20ml 30cm, 150 kg quicklime per mu and then sprinkle the whole pond to thoroughly clean the pond and disinfect the wild fish in the pond. Filter net bags are added when entering the water to prevent wild miscellaneous fish from entering the pool with the water.

Second, pay attention to the selection and supplement of feed.

1. The special feed of Penaeus vannamei from regular manufacturers should be selected to ensure the rapid growth of shrimp and avoid the waste of feed.

2. In the early stage of culture, we should pay attention to fertilization and cultivate biological communities beneficial to the growth of shrimp, such as benthos, plankton and so on. Some beneficial feed organisms can be transplanted into the pool, so that there can be less bait or no bait. With the consumption of basic feed, some pathogen-free fresh bait and special compound feed for young shrimp can be fed, and then gradually transferred to special feed for Penaeus vannamei, which can save part of the feed.

3. In the later stage of culture, when the outbreak period of shrimp disease is over, some fresh bait can be fed according to the local feed source to save the food cost. However, it should be noted that the feed must be fresh and not spoiled.

Third, keep the water quality fresh.

Penaeus vannamei likes fresh water quality. It has the advantages of good water quality, rapid growth and less disease, so it can make full use of bait and reduce the feed coefficient. Therefore, attention should be paid to the regulation of water quality and keeping the water quality fresh. Generally require yellowish green water, transparency of 30ml 40cm, dissolved oxygen more than 4mg / L is better.

Fourth, master the baiting skills.

1. Adhere to the principle of a small number of times, and the amount of feed is also different at different times. Generally, 30% of daily feed at 7: 00 am, 10% at 11: 00, 10% at 18: 00, 40% at 23: 00, 20%.

2. Master the appropriate amount of feeding. A more feasible way is to set up several bait tables of about 1 square meter around the pool, and sprinkle them evenly along the pool when feeding. The feeding condition of prawns was checked after feeding 1.5 Mel for 2 hours. Under normal circumstances, if the satiety rate accounts for 60% Murray 70%, then the feeding is reasonable.

3. Feed the shrimps according to their feelings. Shrimp grow vigorously, feed more when there is no disease, otherwise feed less; feed less when a large number of shrimps molt, and feed more after one day.

4. Feed according to the water temperature. Feed less when the water temperature is below 18 degrees Celsius or higher than 32 degrees Celsius, and more when 25 degrees Celsius is 30 degrees Celsius.