The fish-pig-grass aquaculture technology is based on the principle of benign cycle of ecology and adopts a combination of agriculture, animal husbandry and fishery for the three-dimensional culture. It has not only changed the problem of low yield and low efficiency of the “fishing up for humans†in rough fish ponds, but also overcame the disadvantages of high yields of high-yield fish ponds that were mainly based on artificial feeding. The technical points are:
First, the production layout.
The proportion of ponds, pigs, and feed sites should be 2-4 pigs per mu and 0.3 mu of grass. The pig house should be built in a pond sheltered from the wind and built on the requirement of raising 0.5 pigs per square meter. In the feed area, paddy fields or dry land around ponds or ponds should be selected, and sudangrass and ryegrass should be alternately planted in summer and winter.
Second, fish stocking.
The stocked fish should be dominated by filter-feeding fish and omnivorous fish, with appropriate herbivorous fish. Stocking ratios: 50% for pupa and pupa (37.5% for pupa and 12.5% ​​for pupa), 30% for pupa and pupa, and 20% for grass carp. Each acre stocking large-scale fish species about 800, weighing 20-30 kg, to facilitate the listing of the year.
Third, feeding and management
1, put the fish.
One is fertilization. Allow pig manure to flow into the septic tank for fermentation. Add quicklime or bleach to disinfect the fish pond and apply it to the pond. However, in the July-September hot weather, fish growth season should be reduced organic fertilizer, appropriate addition of urea, potassium sulfate and other fertilizers. The second is feeding. Each day, the amount of green grass is the same as that of the day. The third is water injection. Monthly injection of water 1-2 times, July-September high temperature season every 10 days water injection 1, each time the depth of water injection can be 20-25 centimeters. The fourth is prevention. Grass carp is prone to bleeding, red skin disease, gill disease, enteritis and other diseases. Sputum, gills, gills, and ticks are susceptible to fish diseases caused by pathogens such as bacteria and viruses. In order to prevent the occurrence of these fish diseases, before the fish species are stocked, the ponds are sterilized strictly, and when the fish species are stocked, the fish body is soaked and disinfected once. At the same time, it is necessary to remove the residue leftovers in time to prevent contamination. It is also necessary to hang medicine bags in the food courts, throw lime all over the pond regularly, or mix baits for preventing fish diseases.
2, raising pigs.
The pig house should be cleaned every day, and the pig manure should be put into the pond after decomposing. General breeding into a 90-100 kg of fat pigs, can produce 600 kg of pig manure, can produce more than 20 kilograms of commercial fish.
3, grass.
Sorghum grass is planted around the beginning of April, with 1.5-2 kilograms per acre; ryegrass is planted in November, about 1 kilogram per acre. Each time you harvest the grass, you need to leave 10 centimeters and apply 1 chemical fertilizer or organic fertilizer. Other management methods are the same as conventional grasses.
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