Diversification of fish ponds not only improves the economic efficiency of fish ponds, but also facilitates the formation of a food chain that promotes the mutual promotion of fish and fish. In the process of polyculture, cockroaches can eat sick fish or dead fish that are sluggish and prevent the occurrence of various diseases. Specific breeding techniques are described below.
1. The choice of ponds is to choose a quiet environment, with a leeward sun and a well-drained pond. An area of ​​2,000 to 4,000 square meters is appropriate, the water bank slope is about 30 degrees, the bottom of the pond is flat, the mud thickness is 20 to 30 centimeters, and the water depth is 1.8 to 2.5 meters. Adequate water supply, good water quality, in line with fishery water standards, no pollution, pH value of 7.0 to 8.5, dissolved oxygen above 5 mg/l.
2. Build anti-escape walls and bait stations to build 40-50 cm high escape walls around the ponds. The wall should have a “T†shape to prevent escape. The inner wall of the pond should be smooth to prevent escape and natural enemies. Each pond uses a cement board or board to build 8 to 10 bait stations 2.5 meters long, 1 meter wide, 15 to 25 centimeters above the water surface, and 30 to 40 degrees obliquely fixed in the pond.
3. The seedlings will be drained in pond water before stocking and breeding in winter. Pond clearing, drying ponds and pool repairs will be conducted. 667 square meters cleared fresh lime with 100 kg clear pond. After 7 days, the clear pond is filled with 50cm of water, and the fermented organic fertilizer is applied in the pond to fertilize the pond water. It is better to stocked fish in winter and must be stocked before the beginning of spring. Storks should be stocked better from late March to early April. At this time, the water temperature is around 20°C, which is conducive to adapting to the conditions of the pond as soon as possible. Pay attention to the stocking density and mix proportion.
4. Polyculture objects generally use flowers, white plover and squid as the main polyculture objects. It is also suitable for raising squid, and it can also be fed with certain grass carp and squid. Flowers, white storks stocking specifications 150 ~ 300 g / tail, oysters, clams, grass carp 30 ~ 60 g / tail, wolfberry seed selection requirements of uniform, uniform, disease-free without injury, activity ability, weight 200 ~ 250 grams is better. Stocking densities ranged from 100 to 150 per 667 square meters, flowers and white cockroaches (1:3) ranged from 100 to 125, cod, and cod 75 to 100, and grass carp 50 to 75.
5. Feeding management The key object of feeding the food is quail, quail omnivorous animals, mainly animal protein feed, vegetable protein supplement. The amount of fresh animal food fed is 10% to 15% of the body weight of the alfalfa, and that of the formula is 5% to 8% of the alfalfa weight. In the morning, 40% to 45% of the whole-day amount is fed, and in the afternoon, 55% to 60. % feeding. It should also be based on the weather, water temperature and growth conditions, and each feeding should be finished within 2 to 3 hours. Feeding should adhere to the principle of “appropriatenessâ€, and feeds should be fresh and palatable before being fed.
6. Water Management During the initial stage of stocking, keep the water level 80 to 100 cm. Gradually increase the water level as the water temperature increases. Keep the water fresh. The transparency of the pool water is between 25 and 30 cm. The residual bait is removed in time, and a small amount of water hyacinth can be used for breeding. Summer shade shelters, but the area should not exceed 5% of the total surface area, change the water at the right time, and change the water no more than 20% each time. Sprinkle lime and EM bacteria regularly to ensure that the dissolved oxygen in the water is above 4 mg/l, the pH is between 7 and 8.5, and the ammonia nitrogen does not exceed 5 mg/l. At the same time, the water surface must be equipped with oxygen generators to start the machine at the right time and improve the dissolved oxygen in the water. the amount.
Fishing gear before stocking or fishing need to be used after sterilization. The fish fingerlings should be sterilized in front of the lower pond. The bait material can be washed with fresh water, and the vegetable baits such as aquatic grass and duckweed can be soaked in 20 mg/L bleach solution for 10 to 15 minutes. All pond disease prevention should choose fish and cockroaches can share the potion to disinfect the water. For example, 60 to 70 grams of quicklime, 2 to 4 grams of bleaching powder, 90% crystal trichlorfon, 0.5 to 0.8 grams of strong chlorine can be used per cubic meter of water. , 0.7 grams of copper sulfate and other drugs Quanchiposa.
7. Prevention of common rickets Red-neck disease is generally prevented by the addition of state-provided aquatic antibiotics in feed. The disease can be injected with 150,000 to 200,000 units of gentamycin per kilogram of wolfberry; the control of red spot is generally injected at 200,000 units per kilogram of streptomycin sulfate; mucormycosis is mainly caused by traumatic infection, so The stocking, fishing and transportation should be carried out in strict accordance with national standards to prevent carcass injury from infecting pathogens. The disease can also be immersed in 0.5% to 0.6% saline for a long time.
During the breeding process, the size of the released fry should be matched with that of the fleas. The size of the head should not be too small, otherwise it will be swallowed and affect the survival rate of the fish. Strengthen management. The residual bait should be cleared timely. When the air pressure is low and the weather is hot, it is necessary to change the water or add new water in time to ensure that the water is fresh or rich in dissolved oxygen. Due to the nature of liking and quiet, there is no special situation to pull the net.
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