Grass carp, snail polyculture, only feed grass, do not feed other feed, can guarantee the normal growth of grass carp, snail, grass fish fat, snail Feng. Because the grass carp eats green grass, the excreted manure, protein, organic matter, cellulose, and vitamins are high and it is a good feed for snails. In this way, the water quality will not be polluted, it will remain clear all year round, and the fish and water snails that are raised will be free of any poisonous and harmful substances. They are clean and clean, meat is good, meat is crisp, and the flesh has a strong smell. Clean farming methods. Grass carp and snail polyculture techniques are as follows:
First, the pond. For grass carp and snail polyculture, the water depth must be 1 to 1.5 meters. There must be a long-flowing water supply, and it should be free from pollution. It is best to use the mountains flowing from the mountains or the spring water flowing from the ground. Do not flow through rice and corn. Or other fields that use molluscicides and herbicides are best cultivated in Sanchong Tiancun. In the late winter and early spring, a pond should be built. The pond should be about 1.5 meters high. The bottom of the pond should be flat, and a layer of loose, fertile soil about 8 to 10 centimeters deep should be laid on the surface of the pond to facilitate the activity of the snails in the soil. Foraging.
Second, water storage. It is most appropriate to stock grass carp and snails during the “Ching Ming - Gu Yu†period. In the month before stocking, it is necessary to store a lot of pond water, and directly introduce the landscape water or spring water into the pond. After filling up with water, always check the pond base and pond water and if there is any leakage or reduction, repair and fill the leak. When the pond water is reduced, supplement it in time to keep the pond water 1 to 1.5 meters deep. In the meantime, we must also apply a dry and pure plant ash, spreading 30-50 kilograms per mu, and spread it evenly over the water surface. This can be disinfected and fattened.
Third, put grass carp, snail. During the “Changming-Guyu†period, we put grass carp and snail, and put 500 to 600 robust and uninjured grass carcasses weighing 30 to 50 grams per mu, and put about 100 to 150 kg of healthy, disease-free snail species weighing about 15 to 20 grams. The first batch of small snails can be produced in mid-May. Before the grass carp and snail are put into the pond, first soak the snails with 0.1% soda solution or 0.1% vitamin C solution for 8 to 10 minutes and allow the grass carp to swim for 3 to 5 minutes to disinfect and sterilize to kill the extinction. The various pathogens in snails and snails can prevent grass carp and snail from becoming infected after stocking and can significantly increase the survival rate.
Fourth, feed the grass. After grass carp is put into the pond for 2~3 days, you can feed the grass and feed twice a day. Feed it once in the morning and evening. Put fresh grass 150~200 kg per mu pond and evenly put it in the waters of grass carp activities. Grass carp freely feed. With the continuous growth of grass carp, and constantly increase the amount of grass to put in the second half to put in 350 ~ 400 kg per mu, in order to meet the needs of grass carp growth and development. The grass to be put on must be fresh, clean and free from pollution. The grass that was cut on that day should be put on the same day and not stay overnight.
Fifth, cleaning. During the growth and development of grass carp and snail, attention should be paid to maintaining the depth and cleanliness of the pond water, and paying attention to the long flowing water into the pond to supplement the pond water. It is best to continue to flow out of the water outlet and into the water inlet, day and night. At the same time, the leftover grass that has not been eaten by the grass carp and all kinds of debris floating in the pond will be removed in time in order to prevent pollution of the pond water and avoid deterioration of water quality. In the event of heavy rains and heavy rains, pay attention to flood discharge to prevent floods from flooding the pond base and into the sewage and various germs.
6. Anti-escape and rat-proof. It is easy for the grass carp and snail to escape in rainy days. Therefore, in the rainy days, it is necessary to pay attention to easily escaped places, such as outlets and inlets to prevent the escape of grass carp and snail. Rats are natural enemies of snails. When the weather is cool, or in the evening, or in the rain, snails will climb to the edge of the pond to breathe, and they will be preyed by mice. So, pay attention to rodents. You can use electric cats to kill animals, trap them with mousetraps, kill them with poisonous rat poison. It is also necessary to surround the pond with plastic film or asbestos on the pond base, which is about 50 to 60 centimeters in height, which is good for the prevention of rats hunting snails.
Seven, prevent disease. Grass carp, snail polyculture, feeding only grass, not feed, there is a long supply of water, is a clean culture, rarely disease, but also pay attention to prevention. In general, apply 1000 times of baking soda aqueous solution, or 1000 times of vitamin C aqueous solution, or 25 to 30 times of pure and pure ash leaching solution on the water every month. Apply 500 to 600 kilograms of water per acre of fishpond and apply it evenly. There is a good preventive effect on the surface of the water.
Eight, harvest. Grass carp, snail polyculture, after 6 to 8 months or so, grass carp can grow to 2.5 to 3 kilograms each, or even heavier, snail can also grow to 25 to 30 grams each, you can harvest. In this way, generally, 1500~2000 kg of grass carp can be harvested per mu, and 4000~5000 kg of snails can be harvested. The first and second batch of small snails can reach the harvest standard. When the snails were harvested, in addition to the small snails, they also left 150-200 kg of snails per acre to plant in the pond, allowing them to grow more small snails early next year.
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