Earthen ponds
The earthen pond covers an area of ​​1000-2000 square meters and the water depth is 1.5-1.8 meters. Potted plants, such as water-lilies and water peanuts, were placed 0.8-1m wide on the surface of the pool and were stopped by fences or nets. Use 100-125 kg of quicklime to clear the pond every 1000 square meters 10-15 days before the next pond to kill the wild fish and enemy pests. The seedlings are fed 0.6-0.7 meters deep in the first 5-7 days before the lower pond, and the inlet is filtered with a 60-mesh sieve. Then, with basal fertiliser, 300-400 kilograms of rotten pig cow dung should be applied per 1000 m2. After the water is light green or yellow-brown, it will be released and the pond water will be deepened to 1.5 m after half a month.
The suitable temperature for the growth of carp is 20-28°C, and the feeding begins when the water temperature is 12°C. The pods should be released from late February to mid-March. Before putting it into use, soak the bags in water for 20-30 minutes so that the seeds can adapt to the water temperature (bags can be folded when the temperature difference between the inside and outside of the bag is less than 5°C). Then pour 2-3 pots of water into the bag to gradually transfer the seeds from high dissolved oxygen state to low dissolved oxygen state. Disinfection is carried out before the start of the application. Each 50 kg of water plus 0.75-1 kg of salt is dissolved and soaked for 15-20 minutes. The amount of earthworms stocked per 1,000 m2 of earthworm varies depending on the specifications, with 4000-5000 tails of about 20 grams, 3000-4000 tails of 50 grams, and 2000-3000 tails of 100 grams. At the same time, 50 squid, 30 squid and 200 tilapia can be mixed, which can increase the amount of fish produced and purify water.
Feeding special compound feed (commercially available), add 50-60 grams of multivitamin (vitamin A, B, C, E) and 1.5-2 kg of cod liver oil per 50 kg feed (water temperature below 20°C or 35°C Above, stop adding fish liver oil). Little cubs are added, and more pods are added. In the absence of special feeds, animal feedstuffs such as small trash fish, livestock and poultry organs, silkworm cocoons, etc. can be used instead of flour, and crude protein content must be above 40%. Feeding must do the qualitative, quantitative, timing, and positioning. Generally, the daily feeding amount is 1.5%-2.5% of the carp weight, and it is advisable to eat within 12 hours. For small fish sizes, feed 8 times a day at 8 am and 4 pm. To fix the food table, set 2-3 food trays per 1,000 square meters.
The pool was patrolled every morning and evening to observe the feeding status of the squid. Check the drain after the rain to prevent fish from being escaped. Usually, fresh water is added every 10-15 days, and water is changed every 5-7 days in summer and autumn, changing water by 10% each time. Also pay attention to keep the pH of the pool between 7-8.5.
Pay attention to the control of red fin disease, watery mildew, and small melon worm disease. Every 20-30 days, use furazolidone (2.5-3 mg/l) and bleaching powder (1 mg/l) Quanchiposa once a day for 2 consecutive days. -3 days. Mudworms and blisters were found in the pool. Each 1000 m2 was splashed with crystals of 450-500 g of trichlorfon.
Round type sugical lamp is the most matured LED lamp in all LED series, it has producted for many years and exported to many countries, just like USA, UK, India, Italy, Thailand and other countries in the workd, almost zera maintainance rate, customers all give good feedback. the surgical lamp has the function of Clear lighting field; Outstanding color rendering index; Convenient removable sterilize handle; Control panel can choose touch screen control panel or normal control panel; it also has excellent color temperature adjustable technology; the operating lamp also can add HD camera system which is medical grade; for this OT lamp, it has ceiling type, wall type and mobile type; ceiling type can choose single dome, double dome or add camera system;
LED Surgery Lamp,LED Operating Lamp,LED Operating Light,LED Surgical Lamp
Shandong Lewin Medical Equipment Co., Ltd. , https://www.operatinglight.nl