Grass carp farming is a common farming project in many areas, but grass carp itself has many diseases, and the pond is more prone to outbreaks. Therefore, grass carp culture still has certain technical requirements. Let us know what kind of pond conditions grass carp needs and where the key of pond grass carp culture technology lies.

First, the pond conditions of grass carp culture

1. pond conditions require that the pond should be far away from pollution sources, with an area of 5- 10 mu, a flat bottom, loam as the best substrate, and a little leakage as the best. Sediment 10-20cm, and the water depth is about 2m. Each pond should be equipped with a 3 kW impeller aerator and a 4-inch water pump for timely water change and aeration.

2. Grass carp has many diseases, and ponds are more prone to epidemics. At the same time, eliminating miscellaneous fish is an important measure to ensure grass carp to eat normally and save feed. The specific method is to dissolve 100 kg of quicklime or 100 kg of bleaching powder in warm water under the condition of dry pond (with accumulated water of 5 ~ 10 cm), and sprinkle the whole pond to completely kill pathogenic bacteria.

3. Water quality requirements The pond water quality requires a ph value of 7.5 ~ 8.5, a pond water transparency of about 30 cm during the peak period of aquaculture (June ~ September), and an organic oxygen consumption of18 ~ 20 mg/L..

Second, the requirements of grass carp fry stocking

1, seed selection

Grass carp species should choose individuals who are golden in color, harmless in appearance, lively and robust, and weigh about100g. At the same time, because grass carp hemorrhagic disease and enteritis are easy to infect the current fry, the second-year-old fry is better in the selection of fry.

2. Fish stocking

Grass carp species are generally stocked with 800 ~ 1000 per mu, and individual specifications are 250g ~ 500g silver carp species 100. Carp do not match or match less to avoid competition with grass carp. In addition, the fish should pay attention to the disinfection of the body surface before entering the pool.

Third, the feed ratio of grass carp

1, straw 50%, rice bran 25%, bean cake 25%. 100 kg of the above mixture is added with 10 kg of flour leftovers as a binder. The feed crude protein content is 23.35%, the feed coefficient is 2.8, and the feeding specification is about 0.05 kg per tail.

2. Rice straw 50%, rice bran 22.5%, wheat bran 5%, bean cake 15%, fish meal 5%, bone meal 1%, salt 0.5%, vitamin additive 1%, feed crude protein content 18.78%.

3. Flour 30%, rice bran 8%, bran 38%, bean cake 10%, fish meal 10%, yeast powder 2%, premix 2%, feed coefficient 1.9. If green feed is added, the feed coefficient is 2.2.

4. Flour 30%, fish meal 10%, bean cake powder 15%, bran 25% and rice bran 20%. On the premise that the total amount of basic diet remains unchanged, sweet potato powder 12%, salt 0.5%, auxin 2% and calcium hydrogen phosphate 2% can be added according to the actual situation.