Outdoor open culture is the most economical method for large-scale aquaculture. It is characterized by low investment, simple management, high yield, low disease, and high efficiency. The specific methods are as follows: The choice of breeding sites is to choose lee, damp, dark, loose soil, rich organic matter-rich foothills, slopes, or wasteland as breeding grounds, so as to facilitate the growth and reproduction of snails, and also to cover a layer of organic matter in the soil with poor soil quality. Rich humus or sand for aquaculture. The soil moisture should be controlled at 30-40%, and some gypsum powder or eggshell powder, bone meal, etc. should be added to the soil to supplement calcium. Farming venues must also meet the requirements for drainage during the rainy season. Feed Sources Plants such as dandelion, lettuce, green vegetables, carrots, ramie, and sweet potatoes can be grown on the farm so that the snails can feed on their own, and at the same time they must also feed the right amount of rind, peel, and concentrate feed. The method for feeding the concentrate feed is to mix wheat bran, cornmeal, potato, yeast powder and eggshell powder into a paste, apply it on the leaf of the cabbage and put it on the farm, so that the snail can feed freely, and can also put the concentrate feed. In the trough for snails. Anti-escape uses 60 cm high anti-escape nets around the farm with nylon nets and a small gutter at the foot of the net to stop the snails from looking at the water. Fences can also be fenced around the farm with bare wires along the ground, with 6 volt AC and DC power supplies or 15 volt pulse generators at both ends of the wire to prevent snails from escaping. A 10-cm barrier strip is sprinkled with quicklime powder around the farm, which has better anti-escape effects, but lime must be promptly refilled after being washed by rain. Shade can be planted around the farm with high-stem crops such as trees or sunflowers, or planted squashes, gourd, beans, etc., as well as shady sheds with firewood or shade nets. Daily feeding and management should always pay attention to keep the breeding site moist, but it can't collect water. Droughts are watered 1-2 times a day, and firewood is covered on the free surface to keep the ground moist; during the rainy season, attention should be paid to timely drainage. In addition, attention should be paid to preventing natural enemies from inflicting damage on the ants by using a ditch (water on the water is better) or by trapping fish, shrimps, sugar, bones, etc. Rats can be treated with rats or cats. Timely harvesting When the stocking density is too large, timely harvesting of larger individual snails. Before the advent of winter, when the temperature drops to 15°C, all snails must be harvested in time. The size of the snails must be separated, and the small snails should be warmed indoors or concentrated for winter. After harvesting, you can also plant seasonal vegetables in the farm. China Agricultural Network Editor
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