Feeding amount

Feeding volume refers to the amount of feed fed to grass carp a day in unit pond area. Feeding amount = feeding and feeding rate of grass ponds per unit area. Feeding amount must meet the nutrient demand for fish growth, but it should not be excessive. Overfeeding not only causes feed wastage, increases costs, but also pollutes water quality and affects the normal growth of grass carp. . Feeding of grass carp should be properly adjusted due to changes in water temperature, dissolved oxygen, and other water quality factors.

Feeding rate

Feeding rate refers to the percentage of feeding determined according to the total weight of grass carp ponds. Feeding rate is often affected by fish body size and water temperature, and the feeding rate of smaller fish is larger than that of larger fish. If the water temperature is too high or too low, the food intake of the grass carp will decrease or even stop feeding. When buoyant pellet feeds are used, it is easy to observe feeding points, so it is recommended to feed floating pellets. When using sink pellets, it is difficult to determine the satiation points. Therefore, feeding pellets is recommended. When feeding, feed rate adjustment should be based on regular sampling to determine the average weight of fish, calculate the total weight of the fish, according to the specifications of the fish to determine the feeding rate.

Note: When the water temperature (water temperature measured at a depth of 50cm) is not the same, the amount of feeding and number of feedings are adjusted as follows:

When ≤ 15 °C, feeding rate was 1%, once a day, and fed 3 days a week.

At 16-19°C, the feeding amount was 60% of the feed volume, 1 time per day;

At 20-24 °C, the amount of feed is 80% of the feed volume, 1-2 times per day;

At 25-30°C, the feeding amount is 100% of the feed amount, 2-3 times per day;

At 31-32 °C, the amount of feed was 80% of the feed volume, 2 times per day.

At 33°C, feeding was only performed when fish were observed feeding.

Feeding times and feeding methods

The number of feedings refers to the number (frequency) of feeds fed at a specific time. Feeding too frequently, the feed utilization rate is low; the frequency of feeding is small, and the amount of feed each time must be large, and the feed loss rate is also large. Grass carp is a fish of the carp family. It feeds directly from the esophagus into the intestines for digestion. The amount of food that can be stored at one time is far less than carnivorous stomach fish. Adult fish farming is generally fed twice a day, each time at 8 a.m. and 2 p.m., and the amount of feed in the morning is 30%-40% of the total feeding amount, and 60%-70% in the afternoon; grass carp fry The number of feedings at the stage is more appropriate, followed by the fish species. Feeding methods are divided into fixed-point feeding and decentralized feeding. Grass carp breeding generally uses fixed-point feeding, that is, feeding on a fixed food table.

Feeding methods

Generally divided into artificial feeding and mechanical feeding two kinds. Artificial feeding needs to control the feeding speed. When feeding, it is necessary to grasp two slow intermediate speeds, that is, when the feeding is started slowly, when the vast majority of fish have concentrated feeding, fast feeding, when the fish feeding tends to ease, most of the fish Slow feeding after almost full, feeding time is usually not less than 30 minutes; mechanical feeding, that is, automatic feeder feeding, timing, quantitative, positioning, and has the advantages of saving time, labor, etc., but the use of Mechanical feeding machine is not easy to grasp the feeding status, can not control the amount of feeding.

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