Reasonable feeding is beneficial to the growth of Shrimp, Shrimp Feed quantity and method

Feed is the material basis for shrimp culture and shrimp growth, so it must be reasonably fed according to shrimp feeding habits. The so-called reasonable feeding is to accurately feed according to the physiological needs of shrimp at different growth stages and the living conditions at that time.

prawn feeding

(i) Daily feeding:

1. Periodically estimate the survival of prawns in shrimp ponds.

It is difficult to accurately estimate the survival of prawns in ponds. Because prawns are unevenly distributed in the pond and swim in groups, the survival of prawns in shrimp ponds is generally estimated by experienced shrimp farmers using visual inspection, net frame measurement, trawl measurement and rotary net measurement.

2. Calculate actual daily bait.

According to the estimated shrimp mantissa and average body length, the actual daily feeding amount can be calculated with reference to the control prawn feeding scale, but it should be adjusted at any time according to the actual situation.

3. Adjust the amount of bait reported.

① Regulated according to feeding speed. More than 70% of prawns reached half stomach or full stomach 1.5 hours after feeding, and prawns had no foraging, which indicated that feeding was appropriate. The feed is quickly eaten up, a large number of shrimp swim, empty stomach, residual stomach more than 30%, indicating insufficient feed. On the contrary, if there is surplus feed, it means that feeding is excessive and should be reduced appropriately.

2. Regulate according to prawn growth. Generally speaking, prawn daily average increase is 0.13-0.16cm in early stage, 0.08-0.10cm in middle stage and 0.06-0.08cm in late stage. If the above standards are not met, shrimp body and water environment and no problem, may be caused by insufficient feeding slow growth, should increase the amount of bait.

3. Adjust according to environment. The actual feeding should be adjusted appropriately according to weather, temperature, water quality, pesticide application, etc., and less feeding should be done when the environment is poor.

shrimp culture

(b) Method of feeding.

1. The feeding position. According to the shape of shrimp pond, set up feeding area or feeding zone to avoid throwing feed in the whole pond. To facilitate shrimp habitat activities.

2. Number and timing of baits. According to the season, weather, shrimp body size, flexible control. At the juvenile stage, 4 times a day were fed at 6:00, 10:00, 18:00 and 2:00, accounting for 30%, 10%, 40% and 20% of the total respectively; at the juvenile and adult stage, 3 times a day were fed at 5:00, 19:00 and 23:00, accounting for 40%, 45% and 15% of the total respectively. Feeding is not recommended between 10 am and 6 pm in hot weather. Generally, the best feeding time is after sunset and before sunrise, i.e. 19 o'clock and 6 o'clock.

3. Baiting principles. Should insist on frequent investment, less investment, evening, early morning more investment; a large number of molting, reduce or suspend feeding, a day later, increase feeding; warm wind, sunny weather, more investment; good water quality, slow growth, no disease, more investment; shrimp pond competition for more living things, do not invest spoilage and poor quality feed; water temperature exceeds 32℃ when investment; water quality is not good, do not invest; strong wind rainstorm comes, do not invest; when disease occurs, do not invest. During feeding, pay attention to weather changes, such as rainy days, poor water quality, especially high temperature, should control the amount of bait, reduce residual feed, prevent pollution at the bottom of the pool, prevent shrimp disease outbreak.