CATDOLL : CATDOLL: River crab feed formula, can anyone provide a feed formula for river crabs?

1. River crab feed formula. Can anyone provide a feed formula for river crabs?

Find a premix manufacturer that provides core materials (such as Liyang Zhengchang Feed Technology) to provide feed formula. We did this before. It is safer to find an authoritative one.

2. What are the main raw materials of crab feed?

Protein, such as fish meal, meat and bone meal, and plant protein such as soybean meal, vegetable sprout meal, etc., and energy, such as starch, molasses, oil, etc. Crabs have shells, which are rich in calcium, so the calcium content is relatively high, in addition to the calcium dihydrogen phosphate in the feed, it must be added. There are also attractants.

3. How to prepare crab ingredients

Cut ginger into small pieces, add vinegar, add appropriate amount of sugar, stir well and then dip in steamed crabs. It helps digestion and removes cold evil.

4. How to put food when feeding crabs

Crabs are omnivorous aquatic animals. There are several types of bait for them, but they cannot be fed with a single feed.

(1) Natural bait All organisms that are naturally grown in water and on land are called natural bait. They mainly include phytoplankton, aquatic plants, benthic animals, and terrestrial animals and plants.

Phytoplankton: including diatoms, golden algae, dinoflagellates, naked algae, green algae, etc., are feed for early juvenile crabs and zooplankton.

Zooplankton: Rotifers, cladocerans, copepods, etc. are good feed for it.

Aquatic plants: including Vallisneria, Hydrilla verticillata, Water Chestnut, Potamogeton, Duckweed, Lemna, Water Lettuce, Water Peanut, Golden Grass, etc., are its main natural bait.

Benthic animals: Snails, clams, river clams, earthworms, etc. in the water are its best feed.

Terrestrial plants and animals: including mealworms, earthworms, ryegrass, pennisetum, and comfrey, etc.

(2) Artificial feed Plant feed, mainly including soybean, bean cake, vegetable cake, cottonseed cake, wheat, rice bran, bean dregs, wine lees, soy sauce residue, peanut cake, etc. Animal feed, mainly including snails, clams, river clams, silkworm pupae, mealworms, earthworms, small fish, maggots, livestock and poultry viscera, etc.

When feeding, we must adhere to the principle of reasonable combination of fine, green and coarse feed. Generally, the amount of feed per day is 5%-8% of the crab's body weight. However, crabs have the habit of greedily eating animal feed. If animal feed is fed for a long time, it is difficult to change to plant feed in a short period of time.

The feeding method is different from that of other aquatic animals, but basically the four requirements must be met (timing, positioning, quality and quantity).

Timing: Crabs' feeding intensity increases or decreases with the season and water temperature. In summer and autumn, when the water temperature rises above 15°C, crabs' feeding ability increases, so they should be fed once a day. When the water temperature drops below 15°C, crabs' feeding ability decreases, so they should be fed every other day or every few days. The best time to feed crabs is around dusk, because crabs are nocturnal aquatic animals.

Positioning: Water plants can be directly placed, and other feeds can be placed on the soil slope close to the water level, or in shallow water. This allows for observation of crabs' feeding and activities, and for the addition or subtraction of feed and adjustment of water quality at any time.

Quality control: Concentrated, green and roughage feeds should be reasonably matched. In the early stage, roughage and grass feeds should be mainly used, and a little more should be added. The later stage is an important period for crab fattening, so more concentrated feeds should be added.

Quantitative feeding: The daily feeding amount is 5%-8% of the crab's body weight. The upper limit is taken when the water temperature is high, and the lower limit is taken when the water temperature is low.

However, during the crab breeding period, fresh feed (such as earthworms, mealworms, etc.), fish meal, wheat flour, silkworm pupa powder, peanut cakes, wheat bran, tender vegetable leaves, artificial compound feed, etc. are fed regularly, quantitatively and at multiple locations every day. The daily feeding amount does not exceed 3%-5% of the crab's body weight, of which 70% is fed in the evening and 30% is fed in the morning.

When feeding adult crabs, the total feed distribution in a year is 40% animal feed, 25% roughage (bran, cake, bran, etc.), and 35% green feed (water, dry grass). The first half of the year is the season for crabs to grow bones. In terms of feed distribution, green feed accounts for 50%, roughage accounts for 30%, and concentrated feed accounts for 20%. The second half of the year is the fattening period for crabs. In terms of feed distribution, concentrated feed accounts for 60%, roughage accounts for 20%, and green feed accounts for 20%.

Feed feeding time: from the end of March to the beginning of April, when the average water temperature does not reach 10℃, you can feed less or no feed. If the water temperature exceeds 10℃ at this time, you can feed a small amount of paste feed. After mid-April, when the average water temperature rises to 10-15℃, you can feed paste cakes, bean dregs, rice bran, pig blood, compound feed, etc., but the amount should not be too much. From May to June, you can feed a large amount of aquatic plants. From July to October, increase the feeding of animal feed. After November, feed a small amount as appropriate. The feeding time is generally in the evening or 4-5 pm, once a day. During the molting period, you can feed a small amount more often.

The specific feeding amount is about 1% of the crab's body weight in March and April; 5%-8% in May to July; and more than 10% in August to October.

5. How to prepare crab ingredients

Pour a little vinegar into a small bowl (half a bowl), add plenty of sugar, and stir vigorously until the vinegar is sweet and not too sour.

Chop a lot of ginger and sprinkle it into the vinegar, then stir together.

Finally, put the small bowl on the lid of the crab pot to heat it for a while, so that the sugar can melt faster. If you add too much sugar and it doesn't melt, it's okay, it's sweet.

In addition, when boiling crabs, add some orange peel and ginger to drive away the cold and remove the fishy smell. It will take 20 minutes.