What does the silver carp and the silver carp have?
To provide the nutritional level of these fish, we must use the fertilization method. Fertilizer provides plant and animal floating material, which is the main source of nutrition for these two fish species. In the following, we will learn the usual methods of fertilization in breeding ponds.
How is fertilization done?
Depending on the type of pool and the nutrients in its soil, fertilization is done every 10 to 15 days. To estimate the right time, there is a very simple detection method. In this way, we dip the hand up to the elbow in the water of the pool. If the fingers are visible, it is time to fertilize. Garmabi growers use different types of fertilizers according to their availability.
Organic fertilizers
Organic fertilizer is animal manure, and usually one ton of organic fertilizer is used per hectare, in every 10 or 15-day feeding period. Sheep, chicken, horse, cow manure, etc. It is both economical and accessible, because cow manure is more accessible than others. Of course, the method of using other fertilizers is not much different from cow manure. However, it is better to use its leachate instead of using fertilizer. This method makes your pool less polluted and does not clog with mud. Prepare the fertilizer juice as follows;
You can pour the fertilizer into tanks and add water to it. With this method, the materials in the fertilizer enter the water, the existing water is the "leach". sprinkle it on the surface of the pool water with containers, another way to produce leachate is to pour the fertilizers into hemp sacks, after tightening the sacks, throw them into the pool and in this way, the leachate Add fertilizer to the pool. When you remove the sack from the water, you will see that the scum remains in the sack. The scum should be removed from the surface of the pool.
Mineral fertilizers
Phosphate:
In the market, these fertilizers are known by the brand name calcium superphosphate, in which there is a significant percentage of phosphorus, which varies depending on the different types of phosphates. Anyway, it doesn't really matter which type of phosphate you use. The only thing to consider is the dosage and duration. For each hectare, it is recommended to use 20 kg of super phosphate fertilizer. With this account, one and a half kilograms of fertilizer is required for a breeding pool of 1000 square meters per period. The way to use phosphates is to mix it with 20 times water. Phosphates dissolve very quickly in water and you can sprinkle the solution on the surface of the pool a few minutes later. This fertilization method is recommended every 5 days.
Network:
Nitrogen fertilizers have a significant percentage of nitrogen. The use of these fertilizers has a period of 10 days. It is recommended to apply 57 kg of fertilizer per hectare in each period.
Potassa:
If your earthen pool is rich in clay, there is no need to use this fertilizer. But during a cultivation period, between 15 and 150 kg of this fertilizer is used per hectare. Note that the amount of clay used must be determined by experts.
Terms of warming fish
Different nutrition of carp: Grass carp or amur is a herbivore. These carp fish feed mostly on the plants around the pool. But sometimes these plants are not enough for the fish to have proper nutrition from them, it is better to feed the herbivores with alfalfa and clover and all kinds of dry and wet fodder. Our recommendation is clover and alfalfa. . Amurs feed on food in the pool below 4 kg, but when they exceed this weight, their appetite increases and they need continuous feeding. Carp feeding is done using a wooden frame. Place the fodder on this frame and let it float on the surface of the water. With this method, you prevent the fodder from being scattered on the surface of the pool water and not enough oxygen reaching the water. The amount of fodder should be such that nothing remains in the wooden frame within 6 to 8 hours.
Common carp nutrition: Common carp have a different diet than other carp. Worms, insects and floating plant and animal foods in the pool are their food source. Common carp is the only species that should be fed with pellets or hand foods. Foods such as sunflower meal, soybean meal, wheat bran, beans, cotton seed, barley flour, wheat flour, bran, millet, fish meal, cereal flour, calcium carbonate powder, etc. There is an interesting point about carp and their feeding method. The fact is that carp fishes get used to the same place where they are fed, so don't change this place in any way.
Oxygen supply and aeration: warm waters show great resistance to lack of oxygen, but in a multi-species carp breeding pool, you can tell that there is a lack of oxygen when silver carp and carp come to the surface, because these two Species are more sensitive to lack of oxygen, but amurs are more resistant. If we want to classify. When there is a lack of air in the water, the bream and silver swim on the surface, the amur in the middle depths of the pool and the common ones on the bottom of the pool. Since we don't want to spend too much. It is better to aerate our breeding pool naturally. In the following, we will learn the natural methods of oxygenating the water of the earthen pool;
Direct method: naturally, the direct contact of air oxygen with the surface of the pool water causes aeration. When the amount of oxygen in the water is lower than the air, some oxygen will enter the water.
Water spillage: In the previous issue, we talked about the method of building an earthen pool and the special concerns of pouring water into the pool. We said that when pouring water into the pool, be more patient so as not to make it muddy. It is better for water to enter the pool through the duct (atmosphere) than through the hose, in this way, the water will benefit from the oxygen in the air while entering the pool. With the use of these methods, along with fresh water, oxygen also enters the pool.
Terms of warming fish
Plants become dangerous at night: a very important point that you should know about the oxygen supply to pools is related to the interactions of plants and forage on the surface of the water. Plants that float on the surface of the pool during the day carry out photosynthesis with sunlight. Photosynthesis of plants causes the release of oxygen on the surface of the pool water. Photosynthesis is one of the best methods of natural aeration in breeding ponds. But be careful! Because plants become dangerous at night. Aquatic forages are an oxygen consumer at night. Many heather growers complain that their losses are much higher at night than during the heat of the day. This topic refers to plants floating on water. Therefore, if there are many plants on the water, pay attention to either reduce them or do proper aeration at night.
Period and losses: depending on the weight of the young fish at the beginning of cultivation, each breeding period lasts between 6 and 10 months. Carps gain weight between 800 and 1400 grams at the end of the period. If you follow the tips in this report one by one. You will not have many casualties. In the early days of breeding, there is a possibility that some of the fry will die. So do not worry. It is normal and replace any number that is lost. How to catch!? The last stage is the fishing stage. This step is very important and should not be underestimated. Catching fish should be done in such a way that the appearance of the fish is not damaged. Just like a farmer, you have to harvest your crop in the best way. Some breeders do the fishing in such a way that the fish suffer from suffocation and stress. This wrong fishing method has a bad effect on the appearance and even the taste of fish meat. If you have built a special fish pond next to the main pond, it is very easy to catch fish. Lead the fish to the smaller pond and then start fishing. But if you don't have a fishing pond, it is better to reduce the volume of the pool water first. The water is deep and you can't catch fish so easily. After reducing the volume of water, fishing becomes easier. Be sure to catch fish with a net. This method does not harm them. After catching, immediately wash the carp with water. During fishing, the fish get contaminated with mud and mud from the bottom of the pool, if you don't wash them, they smell like mud. After washing the fish, put them in a basket and immediately transfer them to the market.
