CATDOLL : CATDOLL: How many finished loaches can be produced from one acre of loach seedlings?

How many finished loaches can be produced from one acre of loach seedlings?

If 200,000 regular inch-long seedlings are released, 3,000 kilograms of loaches can be produced per mu (if the breeding is good, the yield will be higher). If 100,000 loaches are released, 1,500-2,000 kilograms of loaches can be produced per mu (much more if the breeding technology is high).

(1) Specialized ponds for raising loaches

This is a breeding method generally adopted by producers who specialize in loach breeding. It is better to have a mud bottom in the pond. If it is a cement pond, the soil should be 15-20 cm deep. The area of ​​the pond should not be too large, about one mu is appropriate, and 50,000-100,000 young seedlings of 3-4 cm in length can be placed per mu. Before stocking, base fertilizer should be spread, mainly organic fertilizer, to cultivate a large number of zooplankton as bait for loach. After stocking, gradually increase the feeding of feed and apply organic fertilizer. The main types of bait are rice bran, bean cake, bran, bean dregs, silkworm pupa powder, earthworms and food processing waste. Fertilizers include human and livestock manure, crop straw compost, etc. If the water temperature is higher than 30℃ or lower than 10℃, the amount of feed should be reduced. Generally, it can be caught after 8-10 months of breeding, and the high yield can reach 250-400 kg per mu. Each tail is about 15 cm long and weighs 10-15 grams, which meets the commercial specifications.

(2) Raising loaches in rice fields

When raising loaches in rice fields, you can use natural bait organisms such as earthworms, chironomid larvae, water fleas and weeds in the fields. By feeding a small amount of feed, you can get better economic benefits. Because loaches have strong vitality, they can burrow into wet mud and use their intestines and skin to breathe to maintain their lives even when the rice fields are drained and dried. Therefore, loaches are one of the ideal objects for rice field farming. The construction of rice fields is the same as raising other fish. Dig one or several fish ponds in the fields, with an area of ​​2-3 square meters and a depth of about 50 cm. The fish ponds are connected to the fish ditches, and the fish ditches are opened in the shape of "田" or "井". Fish interception facilities should be set up at the inlets and outlets to prevent escape. 15,000 to 20,000 loach seedlings about 3 cm long are released per mu of rice fields. Be careful to avoid using lime and pesticides, feed and fertilize appropriately, and catch them after harvesting rice in autumn, or continue to breed them after irrigating them, and catch them again when the fields are plowed in the spring of the following year. Generally, 30-50 kilograms of loaches can be harvested from every acre of rice field.

In addition, a certain number of loaches can be raised in the water surface where lotus roots, lotus, wild rice stems and other aquatic plants are planted. Generally, about 1,000 loaches are raised per mu. As long as the breeding and management are proper, the income from the water surface can be increased.

(3) Family Loach Farming

That is, loaches can be raised in pits and reservoirs in front of and behind houses or in vegetable gardens. Generally, 4,000 to 5,000 young seedlings of 3 to 4 cm in length can be put into the ponds per mu for stocking, or they can be mixed with yellow fish and carp. Pay attention to feeding and fertilizing at ordinary times, such as leftovers, livestock and poultry manure, vegetable leaves, etc., and the feed should be a combination of plant and animal. At the same time, control the water quality. When loaches are found to jump out of the water and "swallow air", it indicates that there is a lack of oxygen in the water body. Fertilization should be stopped and new water should be replaced. When loaches grow to 15 to 20 cm, they can be caught and put on the market. After 8 to 10 months of breeding, the yield per mu can reach more than 100 kilograms.

If you release 200,000 regular seedlings, you can get 3,000 jin of loach per mu (if you raise them well, the yield will be even higher). If you release 100,000, you can get 1,500-2,000 jin per mu (if you have high breeding technology, you can get much more). But what I am talking about are regular seedlings, not fake seedlings. There are too many fake seedlings on the market now. Finally, I wish you success!

How many loaches should be placed per acre of water surface, and how many times the profit can be obtained?

How to breed Daphnia?

Water fleas are small insects that live in stagnant water and feed on microorganisms. They swim with strong bifurcated antennae and are an important food source for fish and other insects. Water fleas (Daphnia) are invertebrates, belonging to the phylum Arthropoda, class Crustacea, subclass Branchiopoda, family Daphnia. They are also called "Daphnia" and "Daphnia". Daphnia are commonly known as "red worms" and are the general name for cladocerans. They are small, oval, flattened on the left and right sides, and only 1 to 3 mm long. They have two shell valves on the outside of the body, with ridges at the connection on the back. There are long spikes (shell spines) extending from the rear end. The head extends out of the shell, with a distinct and sharp snout. The compound eyes are large and obvious, and can rotate continuously. There are simple eyes between the compound eyes and the first antennae. The first antennae under the snout are short and cannot move; the second antennae are well developed with eight or nine swimming bristles. There are 3 to 4 ventral processes on the dorsal side of the abdomen, and the front one is particularly well developed and extends forward. The posterior abdomen is slender and gradually tapers backwards. There are 5 pairs of thoracic limbs, and the tail is claw-shaped. The male is smaller, and the dorsal margin of the shell is straight. The snout is short and blunt or absent. The abdominal process is degenerate. The first antennae are long and movable, with long flagella. The first thoracic limb has hooks and flagella. Daphnia use the bristles on the antennae to move the water upward and forward; when the antennae are raised, the body sinks, as if jumping in the water. In spring and summer, only females can be seen. They reproduce parthenogenetically, and the eggs they produce are called "summer eggs". They are smaller, with thin egg shells and less yolk. They do not need fertilization and can directly develop into adults. Most of these adults are females, and then parthenogenetic reproduction. Therefore, they can reproduce in large numbers in a short period of time, and they are red, so they are called red worms. In autumn, some small males hatch from the summer eggs and begin to reproduce sexually. The eggs they produce are called "winter eggs". Winter eggs are larger than summer eggs, with thicker egg shells and more yolk. Fertilized winter eggs, also known as "dormant eggs", survive the severe cold or dry environment and develop into new females in the spring of the following year when the temperature is higher. Except for a few that live in seawater, most are the most common zooplankton in various freshwater waters and are excellent bait for fish. Daphnia refers to two major types of aquatic zooplankton, cladocerans and copepods. They are rich in nutrients and easy to digest, making them a palatable bait for fry and fish species. Artificial cultivation of Daphnia for feeding fish has low cost, fast fish growth, and good production increase effect. The method is: 1. Build a pond with earthen ponds and cement ponds. The pond is about 1 meter deep and the size is preferably a rectangle of 10 square meters to 30 square meters. 2. Fill the water pond with water about 50 cm deep. The suitable water temperature for Daphnia is 18℃～25℃, the pH value is 7.5～8, and the dissolved oxygen saturation is 70%～120%. 3. Fertilization: For each cubic meter of water in an earthen pond, add 4 kg of cow, horse manure or other animal manure, 1.5 kg of rice straw, wheat straw or other non-toxic plant stems and leaves as base fertilizer. Apply topdressing once after 10 days, with the same amount of topdressing as the base fertilizer. After that, apply topdressing according to the water color to keep the water color yellow-brown. For each cubic meter of water in a cement pond, add 1.5 kg of cow, horse manure or other animal manure, plus 1.5 kg to 2 kg of fertile soil. Apply topdressing once every 8 days, with the amount of cow, horse manure or other animal manure being 0.75 kg. 4. Cultivation: Whether it is an earthen pond or a mud pond, a mixed culture method of yeast and inorganic fertilizer can be used. Add 20 grams of yeast per cubic meter of water. The yeast can be soaked in water for 3 to 4 hours before being poured into the pond. Apply 65 grams of ammonium carbonate and 37.5 grams of ammonium nitrate per cubic meter of water. Apply once every 5 days, with the amount used being half of the initial amount. After adding yeast, expose the pond water to the sun for 1 to 3 days, then you can add Daphnia as seeds, with the amount of seeds being 30 to 50 grams per cubic meter of water. 5. After 15 to 20 days of catching Daphnia seeds in the pond, they will multiply in large quantities and cover the entire pond. At this time, you can catch them in batches to feed the fish. Generally, you can catch them every 1 to 2 days, and 10% to 20% of the total amount each time. In an environment where the water temperature is 18℃ to 20℃, you can catch them frequently and continuously. First, prepare a container. It can be a small tank, pet box, PET bottle, etc. The best suggestion is to use a container with a larger area of ​​contact with air. Because Daphnia will float to the surface of the water and make breathing movements, if there are a lot of them, some of them may not be able to compete for a position and die~~~ Light source: Generally, breeders are told that as long as there is light, it will be fine. Then...what about at night? Won't they all sink to the bottom? That's right, they sink to the bottom, and most of them die the next day. Why? Because they are too lazy to breathe~~~ Therefore, it is recommended that the light source should not be turned off at night. You can use a small light source (such as a 5w night light, etc.) to avoid this trouble. Of course, some people will say, do you have to raise it like this? The answer is not necessarily, but there is a need to have a large number of them. We raise it not just for fun, but the key is the number of pots. Only when there are enough can we feed the fish, right? Feeding; generally, breeders are told to use yeast powder soaked in water to feed, but if the amount is not well controlled, the water quality will deteriorate quickly, causing the water fleas to die quickly, and then you have to buy water fleas again or ask others for more~~~ So, my method can be considered to prevent this. At the same time, you don’t have to worry too much about buying yeast powder, because sometimes yeast powder is hard to find, or it comes in a big bag and you can’t use it up. Because later I thought, if I soak yeast powder in water and feed them, then can I feed them with anything that is soluble in water? The answer is yes, because round water fleas are filter-feeding creatures, so they usually survive by filtering nutrients in the water, because if the things we throw down are soluble in water, they can eat them~ Because, Daxiong tried "sheep blood" (special thanks to Xiaoqiu for his enthusiastic sponsorship) to feed and found that the effect was good. Later, I heard that the reason for using yeast powder is that there are some amino acids in it, and water fleas can eat this. As for amino acids, I can't get them, so I have to use fresh milk~~~ I believe it will also have a good effect.......... Daily care: Actually, you don't need to care about them. Just give them light and some feeding. As for changing the water, after sucking out the water fleas, add the amount of water that was sucked out. If there are too many algae, it's also good to put some apple snails. As for the effect, it depends on you to try it yourself. As for the amount of feeding, don't feed too much at a time. 2~3cc at a time is enough. Don't think it's too little. This is enough and it won't cause the water quality to deteriorate at once. As for filtering water fleas, it is much easier than filtering brine shrimp. If you don't want to filter, you can use its phototropism to attract them with light and then suck them out with a dropper, then wash them with plenty of clean water, and then you can feed them. If you want them to be more nutritious, feed them some nutrient solution before feeding, and feed them to the fish after one to two hours. It's more nutritious this way. Filter water fleas. Generally, we think that when there are enough Daphnia, we can feed them. Since Daphnia are phototropic, we can use this characteristic to attract them to the corner when filtering, and then use the air duct to suck them out. The Daphnia sucked out are mostly mixed with the dirty water of the original Daphnia tank. In order to avoid polluting the fish tank, we have to filter it. We can use a fine mesh net or a "biological filter (300 mesh)" bought from a chemical material store to filter. After filtering, soak it in clean water, or add some materials (milk, vitamins, etc.) Then, the fish can eat these things indirectly. Collection and cultivation of Daphnia After collecting Daphnia from the river, it should be placed in a larger glass tank. Some water brought back from the river and green algae, such as Spirogyra, should be placed in the tank to increase the oxygen in the water. Some minced meat made of earthworms, locusts or other animals should also be placed as bait for Daphnia. When the number of Daphnia increases, it should be harvested in time and dried. In late autumn and winter, the reproduction capacity of Daphnia is greatly weakened. In winter, when you can't see Daphnia in the water tank, don't pour out the water, because they are hiding in the green algae. We can put the water tank in a sunny room or near the radiator. In spring, when the indoor temperature rises, Daphnia come out again. When the room temperature rises above 28℃, Daphnia begin to reproduce in large numbers. Daphnia can be used to raise hydra for teaching.