(1) Requirements for feed. The different growth stages of Penaeus vannamei have slightly different food requirements. In the larval stage (within 5cm), the requirement for protein and unsaturated fatty acids is high, and it should reach 35%; In the shrimp stage (5-12cm), protein and unsaturated fatty acids can be reduced accordingly, and the protein can be in 22%; (12-23cm) The requirements for protein and unsaturated fatty acids in foods should be high. Protein should be mentioned as 25%, especially in the period of gonadal development. However, in general, Penaeus vannamei can grow normally with low dietary protein content (20-25%). Now there is already a certain amount of feed for South American white prawns on the market. Moderate food can be. (2) Feeding amount. The amount of bait should be determined according to the weather, survival rate, amount of residual baits, health conditions, water quality environment, shelling, medication, and the amount of biological feed. Under normal circumstances, the survival rate of the shrimp in the pool can be determined according to the following formula: Survival = Average number of traps per net Acquisition area Shrimp pond product K (K is the escape coefficient Depth of water is 1.2-1.5 Water depth is 1.5m 1.3-2.0, when the water depth is 2.0m, it is about 2-3, and there are many empirical algorithms and methods to determine the liveness, which can also be determined by the prey conditions.The following table can be used for reference.(3) Feeding Techniques Feeding Management To be relatively reasonable, it is necessary to ensure that shrimps are eaten and eaten well, but also take into account the breeding environment and cost savings. The techniques for feeding bait are: 1. Adhere to diligent feeding (less than 4 feedings a day); Feed more in the evening and before dawn, feed less under the conditions of the sun; 3. Feed more than 30% of the empty stomach after feeding for 1.5 hours. 4. If the water temperature is lower than 15°C or higher than 32°C Feed less; 5, when the wind and the sun will feed more, heavy storms (7 or more), cold invasion (cooling above 5 °C) when feeding or not feeding; 6, a large number of prawns on the same day less feed, shell 1 Days later, more feeding, 7, more competition in the pool, suitable for more feeding, 8, when the water quality is good, feed more, when the water quality is worse 9, when the pool of biological feed is adequate, it can be fed less.The amount of feed, feed time to be due to the time, due to the flexibility to grasp, the general culture in the early basin-based bait-based, not feeding or less feeding; The basic bait in the pool is basically depleted, and it should be changed to feed with bait. The shrimp in the later period is close to harvesting. In order to promote growth, some fresh shellfish can be fed in appropriate amounts.
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