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Technical Guide to Farming Crab in Cement Tank

Field crabs are very easy to raise, but in the process of taking care of people, they also need certain knowledge. Today, I would like to share with you about the technique that has been successfully applied in many models in families raising crabs in cement tanks. And many households have become rich by applying it. farming techniques for field crabs This. We invite you to read through the article below.

  1. Prepare a cement tank for stocking crabs

Depending on your model, the design of the crab tank has different sizes. On average, the cement tank has a width of more than 50m2, a height of 1m. The bottom of the tank needs to be designed with a different slope, making a water supply and drainage system with a plastic pipe with a valve lock in the low-lying part. There is a net on the tank to prevent sunlight from entering the tank.

Cement tanks for farming crabs need to be built to the right standards
Cement tanks for farming crabs need to be built to the right standards

It is necessary to clean the cement in the tank by using chopped banana stems to soak in the tank for 1 week and then remove the water. Use a strong spray nozzle into the tank to wash away the dry layer of cement out. Then disinfect the tank with chlorine or potassium permanganate before stocking crabs.

Arrange solid laterite rocks planted on top of each other (about 0.5m from the mouth of the tank) to create burrows for crabs to hide. Note the cave in the high part of the tank. The bottom of the basin contains water about 4-7cm (the deepest part is about 7cm of water) and the water area accounts for 1/3 of the tank area.

  1. Water conditions, and temperature

The water is fresh water, without detergent, it is recommended to use well water with a pH of about 6.5 to 8; not contaminated with toxic substances, domestic wastewater …

The suitable temperature for crab development is from 25-270C.

  1. How to choose seed crabs to release cement tanks?

The most important factor determining the number of crabs in the future is to choose crabs of the same litter. Why choose crabs of the same litter? Because crabs are crustaceans, they are very weak when they shed their shells. If the crabs are not in the same litter, they may eat each other during the molting process. It is best to buy crab seed at seed distribution centers.

Select seed crab with size 1.2 to 1.4cm; about 350 to 400 fish/kg, the crabs are uniformly large, healthy, shiny shells, nimble and do not lack legs and claws.

Seed crabs need to be carefully selected to ensure health
Seed crabs need to be carefully selected to ensure health
  1. Stocking density and timing of seed crab stocking

Stocking time: From February to April every year, stocking in early morning or cool afternoon.

Density: from 20-30 fish/m2.

  1. Tank cleaning

Need to regularly clean the cement tank by draining all the water in the tank, changing the water for the crabs. Avoid letting crabs eat rancid leftovers.

The first month when the crabs are young, the water is changed once every 5 days, and the next month, the water cycle is changed once every 2 days. This helps the crabs quickly shed their shells, and prevent some parasitic diseases in the crabs.

Time to change the water: should be replaced at noon, because at this time, the fish is still hiding in the cave.

Remove dead fish from the tank.

Note: when changing the water, people need to have a mesh at the mouth of the drain to avoid the crabs escaping. When pumping water, it should be pumped slowly so as not to cause damage to crabs.

  1. Food and how to feed crabs.

Food: Crabs are omnivores, so food for crabs is easy to find, low-cost: organic humus, roasted bran, cornmeal, rice flour, dried peanuts… In addition, they also like to eat meat. molluscs such as mussels, snails, mussels, trash fish, small worms…

At the time of stocking, farmers can use cooked cornmeal to drop into the tank. 1 feeding 2 times a day in the early morning and evening, with a 5% diet.

From February to April, it is possible to feed more yellow snail meat, industrial bran, cooked corn bran with a 7% diet.

After 4-6 months, the ration increased to 10%.

Note: People should feed crabs at certain times of the day. Usually in the morning feeding from 5 am, afternoon at 6 pm, at this time crabs often crawl out of the burrow to find food.

  1. Harvest time

After 9-10 months, crabs will be harvested. When crabs reach commercial size (50-55 fish/kg) and get high prices, they can be harvested.

Farmed crabs for about 10 months with the best conditions will be able to harvest
Farmed crabs for about 10 months with the best conditions will be able to harvest

Farmers can choose large and strong female crabs that have eggs to continue breeding for them to breed for the next crop.

With this article, people can refer to and combine the methods of households who have successfully raised crabs in cement tanks to get the best selective knowledge. Or you can refer to the technique of raising field crabs in ponds and fields. Since then, farmers have applied the farming model of copper in their families more effectively. Happy successful people!

Emilia Chaney
Emilia Chaneyhttps://agrisearch.net
My name is Emilia Chaney. I'm a social girl from Romania with a big smile and 3 passions: Agriculture, Travel and Social Media. I try to make this blog practical, full of great advice and inspiring ideas.

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