Artificial snail breeding snails, simple facilities, convenient management, the vast majority of rural areas make full use of the existing rice fields, ponds, etc. for breeding, access to better economic benefits.
1. Fence settings. Fence breeding water conditions: soft soil, convenient drainage and irrigation, good water quality, water depth of 0.5 ~ 2m, aquatic plants grow flourishing waters. The fence area can be as large as small, and generally intensive cultivation requires 1,300 to 6,700 square meters. The fence material can be made of locally produced eucalyptus foil, about 2.5m in height, 30cm into the mud, and at least 50cm above the water surface. Two weeks prior to the release of the snails, the first thing is to kill the eel and squid in the fence to avoid eating snails. Then fertilize in the fence, and treat 150 kg of manure and feces per 667 square meters. When fertilizing, the fertilizer should be put into the mud in the bottom of the pond and the seed screw can be put on until the water surface does not take a bubble. The plants growing in the fence are used as feed for snails, but they can also shade and cool, which is beneficial to snail habitat and growth.
2. Feed the snails. If the fence area is greater than 6700 square meters, 15 species of screw can be placed per square meter through natural breeding. In artificially intensive waters, about 120 species of snails are kept in each square meter, and 80% are female snails. The difference between the mother and the male is mainly observed through the observation of changes in the antennae of the snails in the basin. The right antenna of the male becomes the cross-connector, which is thicker and shorter than the left tentacles. The mother's right and left antennae are symmetrical. Choose screw species with a light green color, a large individual body, thin shells, few threads, and no breakage. In the first year of breeding, the species of snails can generally be purchased from local fishermen in April, after which they can keep their own seed. The breeding season of snails is from April to October. From May to July and from August to October, 20 to 25 g of 4th-instar mother snails are released in batches. Field snails are born as ovaries. Female snails produce 20 to 30 larvae each time, producing about 150 in 1 year.
3. Feed the feed. Mutton is an omnivorous animal that ingests aquatic organisms and spoilage organic matter under natural conditions. Artificial breeding can be fed rice bran, bran, leaves, melon leaves and feed, especially the leaves and algae of aquatic plants are the most loved. Feeds for feeding require quality and freshness. After the screw is put into the feed, the feed can be fed. Feed it once a day at 7:00 in the morning, and the amount of feed should be controlled at about 2% of the screw weight.
4. Feeding management. The optimum water temperature for snail growth is 20-26°C. When the water temperature rises to 15°C, acupuncture is started. When the water temperature exceeds 25% in summer, it will stop breeding. When the water temperature reaches 40°C, it will cause death. It is necessary to step up inspections and pay attention to changes in the water level in the fence. The snails climbed onto the escarpment and escaped the fence. Therefore, each patrol should be performed once every morning and evening. It was found that snails crawling out of the water should be swept into the fence in a timely manner, and that the damage to the fence should be promptly repaired, and ducks such as wild ducks must be prevented. The harm of predators. For overwintering species, the fence should be covered with more water and grass insulation to facilitate the snail's smooth wintering.
5. Harvest. After being grown for 1 year and weighing 10 to 15g, it can be harvested and marketed. The harvest time should avoid 3 peaks of snail breeding in early June, mid-August, and late September. At the time of harvest, large and round snails were selected as the snail for the following year. The snail meat harvested from November to March of the following year has the best meat quality. Fishing is commonly used to trap nets and dip nets to catch large and small animals.
Author: Yifeng Town Fisheries Station, Yandu District, Yancheng City, Jiangsu Province
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