Culture cost of silver carp

In the culture mode of silver carp, the culture cost is 1.5 yuan / jin, and that of flower silver carp is 1.8 yuan / jin. However, in the process of breeding, it is necessary to reasonably control the input density, do a good job of water quality fertilization and topdressing, and apply fertilizer according to the characteristics of different fertilizers, so as to increase income.

The cost of cultivating silver carp is about 1.5 yuan / jin, and the cost of cultivating flower silver carp is 1.8 yuan / jin. The new concept of modern silver carp culture is to cultivate enough fertilizer of water at one time, and then use the existing fertilizer and water to fertilize. To give full play to the role of autotrophic and heterotrophic mixed culture system, in order to expand the sources of bait such as organic detritus and biological flocs of silver carp, fertilizer, carbon sources and beneficial bacteria can be increased to achieve the goal of fast growth and high yield.

I. the release density of fish species

The target production of fish is determined by the number of fish species put in. Take the cultivation of silver carp as an example, if the planned net output per mu is about 600 jin, and all of them are to be listed, it is necessary to put in 90 silver carp species with specifications of more than 1 jin, 30-40 silver carp species with specifications of 1.5 jin, and 30 silver carp species with 0.5 jin.

Second, master the techniques of fertilization and water transfer.

1. Do a good job in the application of base fertilizer. When the water temperature is relatively low in early spring, 200-300 jin of rotten fermented chicken manure can be applied to each mu.

2. During the first water culture, the water body can be cultivated to enough fertility, and then a small amount of topdressing can be carried out for many times.

3. The varieties and usage of topdressing are as follows: use 10 kg of ammonium bicarbonate per mu, or 7-8 kg of ammonium chloride, and sprinkle it on the whole pond after melting into water. From June to September, at 5-7 p.m. on a sunny day, dry sprinkle the whole pond with 2 kg of urea per mu, 5-10 kg of phosphate fertilizer such as calcium superphosphate or 2 kg of water fertilizer per mu, and 2-3 kg of carbon source per mu. Use 200g of beneficial bacteria per mu, such as live water, EM bacteria, spores, etc., but must be soaked in sunny days for 2 hours before application, if there is a case of dead fish, it can not be used, the fish disease must be cured before edible bacteria. Phosphate fertilizer, carbon sources and bacteria can not be sprinkled dry, need to first melt water, and then sprinkle the whole pool. The time interval of topdressing is: phosphate fertilizer 5-7 days / time, urea and carbon source 3-5 days / time, beneficial bacteria about once every 10 days.

Matters needing attention in the culture of silver carp

1. In order to avoid flooding ponds and other situations, it is necessary to control the fertility of the water body, and the transparency of the water body can be achieved in 20~25cm.

2. do a good job in the detection and regulation of water quality. At noon, the PH value of the water body can not exceed 9, if it is too high, it is necessary to use carbon sources and spores to regulate the water quality, and the nitrite in the water body is controlled at 0.05mg/L and the ammonia nitrogen content is controlled at 0.2~0.3mg/L. If the water body is abnormal, the water quality should be adjusted in time to make the water body "fat, alive, tender and cool".

3. In order to prevent the toxins in the water from being overweight, detoxification should be done regularly. During the high temperature period, 15 days a time, detoxification should be done with stress detoxification or sodium thiosulfate.

4. The application of carbon source and phosphate fertilizer is not affected by the weather, and if it is applied on cloudy and rainy days, the amount should be reduced by half. Urea or other nitrogen fertilizers and beneficial bacteria must be applied when the weather is clear. If it is applied after October, you can choose nitrogen fertilizer such as ammonium bicarbonate or ammonium chloride.

5. If there is no fertilizer after fertilization, the corresponding solutions should be taken according to the various situations caused by different reasons. If there are more zooplankton, local killing can be used. Cypermethrin and avermectin can be selected for disinfection, and insecticides are sprayed along about 0.5 m around the pool in the morning. The amount of disinfectant should be determined according to the area of the water surface. If it is caused by old water, the water quality should be adjusted by adding photosynthetic bacteria and injecting new water.

6. In order to reduce the load of fish on the water body, it can be caught 1-2 times in the middle of culture and sold on the market.

7. If a relatively large water area is used for high-density culture of silver carp, it is necessary to make a clear culture plan for the culture site at the beginning of the year.