Spirulina is miscellaneous, fast-growing, adaptable, and easy to breed, but it is susceptible to light, so it is suitable for rice farming. Especially in areas with abundant aquatic resources, there is great potential for development and broad prospects. Now the technology of paddy field snail culture is introduced as follows. 1. Rice field selection. The nutrient paddy fields should be selected for paddy fields that are dry and flood-free. The field ridges should be compacted and raised to 0.5m or more. Do not use agricultural machines for farming or ploughshares. However, weeds must be eradicated. 2. Water quality requirements. Field snails are more sensitive to the dissolved oxygen in the field water. When the oxygen content is less than 3.5 mg/L, the ingestion is poor and the dissolved oxygen begins to die at 1.5 mg/L. Therefore, Tianshui must have fresh water and high dissolved oxygen. 3. Rice field facilities construction. Farming snails should arrange the rice fields into strips with a width of 2-3m. The water depth should be maintained at 30-60cm. In the middle, bamboo pieces and wood sticks should be placed every 30cm to allow the snails to absorb. It is also possible to leave an empty track during the transplanting of rice, and in the first week after planting, dig trenches with a width of 20-30cm and a furrow depth of 13-17cm, and a denser grating should be set at the inlet and outlet of rice fields. Smaller polyethylene mesh. Tian Hao was strictly prevented from leaking through holes in rats, snakes, etc. to prevent snails from fleeing. 4. Snails' stocking and management. 1 growth law. The growth and development speed of snails are related to environmental conditions, feed and sex. In the hot season, when the water quality is good and the feed is sufficient, the growth is fast, whereas the growth is slower. In the middle screw stage, the growth rate is fastest, and the growth rate slows down when the body weight is about 100 g. In addition, female snails grow slightly faster than male snails. Under the condition of artificial breeding, when the feed is sufficient, the newly hatched young snails are raised for 1 month and the body weight is about 25g; for 2 months up to about 50g; 3 months up to 100-150g; 6 months can be reached About 200g; feeding for up to 400-500g in 1 year. 2 stocking. Rice fields should be cultivated with snails, and they should be stocked in a timely manner, and the stocking density and specifications should be controlled. The stocking time should be 15 days after the rice is planted in late June, and should be stocked in early August. In general, 3 to 60,000 young snails of 2-4 g in size are stocked in paddy fields per hectare. Natural bait rich can be more appropriate; otherwise it should be placed less, so as not to affect the individual size and population of snails. 3 feeding management. The forage of snails can be used for all kinds of aquatic plants and leaves and tender stems of terrestrial plants. To promote growth, supplements can be supplemented with concentrates. Feeding time can be carried out in the evening. Duckweed and tender grass can be fed side by side. The amount of feeding is about 10% of the total screw weight every day, and the ratio of green and concentrated feed is 5:1. The water quality management should also be strengthened during the breeding period. Generally, the water should be changed once every 3-4 days. Rice fertilization in paddy rice field should be applied to the base fertilizer 1 time before planting, supplemented with topdressing. Paddy field pest control should use low-toxicity and high-efficiency pesticide spraying with water, and should not be mixed with soil. 5. Snail's stocking and management. 1 stocking. Farmed snails need to be flexibly controlled depending on the situation, which is usually 9-10.5 million per hectare. It is also possible to feed snails, which are generally 0.1-0.5 kg per square meter. 2 feeding. The snails are miscellaneous, and in addition to eating natural foods, they can be fed with some vegetables, bean cakes, rice bran, quail, etc., as well as other animal organs and scraps. The bait should be fresh and the bait can be fed 2 weeks after it is produced. When baiting, the solid bait should be soaked first, and the fish miscellaneous, animal viscera, and scraps should be crushed, and then mixed with rice bran or bran and fed. Feed once a day, feeding time is usually 8-9 am. The daily feeding amount is approximately 1%-3% of the total weight of the snail, and as the body weight gradually increases, its food intake can be adjusted appropriately. For some of the more fertile rice fields, it is also possible not to feed bait and allow them to ingest natural zooplankton and aquatic plants in the water. When feeding, if it is found that the meat snail after shredded snail shiver, indicating that the snail calcium deficiency, at this time should be added to the food in shrimp feed, shellfish powder and so on. If the bracts are trapped in the shell, it is due to lack of feed and hunger. The feeding amount should be increased in time to avoid affecting the growth and reproduction of snails. 3 feeding management. The snail's feeding and management, the most important thing is to pay attention to good water quality, water temperature. In the summer and autumn, snails are feeding well and are in high temperature seasons. They use flushing water to change irrigation fields, lower the water temperature, and increase the amount of dissolved oxygen. In addition, water sources with high levels of iron, sulfur, and industrial wastewater must not be used, as this will directly lead to the death of snails.
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