Liantian Ecological Farming Macrobrachium rosenbergii

Liantian Ecological Farming Macrobrachium rosenbergii

1. Lotus field selection. Choose a field with sufficient water supply, convenient drainage and irrigation, clean water, no pollution, and good light. Let's keep a field height of 40 cm and a width of 30 cm. Cover the field ridge with a plastic film toward the water side and compact it with soil to prevent the ridge from leaking. To excavate the "+" word ditch and ring ditch in the lotus field, the ditch width is 80-100 cm, the ditch depth is 40-60 cm, and a pit of 20m2 in size is dug by the water inlet and outlet, and the pit size is generally occupied by the field block. 3%-5% of the area is suitable, 1-2 pieces/mu, pit depth is 0.8-1m, ensure that the shrimp has plenty of space for activities, and is beneficial to photosynthesis of phytoplankton, increase dissolved oxygen in water, and also facilitate shrimp body Sunlight is beneficial to the absorption of calcium in shrimps and promote the growth of carapace.

2. Anti-escape facilities. In the inlet and outlet of the lotus field, use a wire mesh piece to prevent escape. The height of the mesh should be at least equal to that of the field ridge, and both ends should be buried in the mud for 30 cm in order to improve its stability and filter effect.

3. The stocking preparation is to sterilize 50-75 kg of quick lime per acre for the lotus field, and the whole field is splashed with water. To kill pathogenic bacteria, wild fish, frog eggs, cockroaches, grasshoppers, green mud moss, and water net algae, etc., and to increase calcium fertilizer and improve lotus field sediment.

After the drug toxicity in the clear pond disappears, 50-100 kg of fermented organic fertilizer is injected per acre to promote the growth and reproduction of plankton and provide natural feed for the shrimp to supplement the shortage of artificial feed.

The transplanting of white lotus is generally done from late March to early April. The planting density is 250-300 buds/field.

According to the living habits and growth patterns of Macrobrachium rosenbergii, some aquatic plants, such as water lettuce, water hyacinth, and hymenophorous algae, should be properly stocked in the lotus field (before putting it in, 20 g/m3 of potassium permanganate or 2) should be used. 4 g/m3 of bleached powder dipped in the roots of aquatic plants), and the number of puts was about 1/10 of the area of ​​the lotus field. Provide shrimps with habitats and hidden places to reduce the number of killing each other, especially when the shrimp clams hide the enemy, thus increasing the survival rate of shrimp.

4. Shrimp stocking. Stocking specifications and quantity The size of Macrobrachium rosenbergii was 0.8 to 1 cm. A total of 13,000 shrimp seedlings were released, 25,400 tails per 667 meters. The stocking time is mid-May (water temperature is kept above 20°C).

Seven days after the shrimps were released, they were fed with 100 large polyculture fish and 20 fish. Objective To control the reproduction of plankton through the ecology, avoid excessive water quality, reduce the amount of drugs used, and reduce the cost of breeding.

5. Daily management. In the early feeding period, egg-yolk and soy milk are mainly fed, supplemented with some peanut bran, wheat bran, and fish meal. The feed amount is 15% of the total weight of the shrimp, and it is mainly fed with feeds in the later period. It is appropriately assisted in feeding some animal feeds such as small fish, internal organs of livestock and poultry, etc. The feed amount is 6%-8% of the total weight of the shrimp. , Feed twice a day, 1 time in the morning and 1 in the morning, 1 in the early morning (about 30% - 40% of the daily feed amount), and more in the late night (account for 60% - 70% of the daily feed amount) ) The bait should be placed as far as possible in the ring ditch around Lintian to facilitate uniform feeding of shrimp.

Keep the lotus field micro-flowing water and filter it with a double sieve to prevent impurities and wild fish from entering the lotus field. Adjust the water level to 40-50 cm. The water color should be greenish.

Sprinkle 10-15 kilograms of quick lime every 15-20 days. Found shrimp disease, timely treatment of coping disease, in addition to the implementation of water disinfection, combined with oral drugs (Fu Ling Ling, Ke Fu Ning, sulfonamides, etc.), external use of drugs prohibited the use of sodium pentachlorophenol, copper sulfate malachite green, methamidophos , fish net insects and other insecticides to avoid pollution and unnecessary losses.

Check the field every morning and evening to check the integrity of the anti-escape facilities, especially during flood season, pay attention to flood prevention and flight prevention. Check the food intake of Macrobrachium rosenbergii. Check water quality. Invade the enemy, attack disease, and pay attention to theft.

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