After entering the autumn, the weather turns cold, the water temperature gradually decreases, and the growth rate of fish gradually slows down. However, at this time, the number of pathogenic bacteria in the water body decreases, and the incidence of fish is small. Therefore, autumn is the golden season for fish growth and fattening.
(1) The mild climate in autumn is a good time for fish fattening. At this time, a large amount of fertilization is needed to ensure the feeding needs of different food fish. The amount of feed to feed is determined in principle according to the feeding conditions of the fish, that is, how much fish feed on how much to feed, to ensure the amount of sufficient, while insisting on timing, fixed-point, qualitative, quantitative. The ponds that mainly support herbivorous fish should be fed with green fodder first and fed with formula feed; while the ponds that mainly raise trout should be treated with inorganic fertilizers, so that they can be applied sparingly and frequently, usually every 5-8. Once in Tianshi, apply 2 kg of urea and 3 kg of phosphate fertilizer every 667 square meters (1 mu). After fertilization, the water should be yellow-green or oil-green. After entering the winter, the water temperature is relatively cold. At this time, in principle, no feeding and fertilization will be applied. However, when the water temperature is 7°C or higher, appropriate feeding should be conducted so that the fish will not fall out and the winter can be safely passed.
(2) There are more fertilizations in autumn, fish eaten well, and water quality changes quickly. Careful management of water quality should be conducted to ensure the safe growth of fish. Under normal circumstances, add new water once a week, add 10-20 centimeters each time, and keep the water depth at 1.5 meters or more; fish ponds with higher density should open the aerator for 1-2 hours at noon every day. In winter, the water temperature is low and the dissolved oxygen is high. The new water can be properly reduced to keep the water, fertilizer, live and cool, and give the fish a suitable environment.
(3) Continue to adhere to the patrol pond. When the weather is abnormal, the patrol pond will be carried out more than 3 times a day. When the fish floating head is found, measures shall be taken immediately to remove the residual bait and water surface foreign matter in time to keep the food table clean and hygienic; Find out the cause of dead fish and take the necessary measures. Pay attention to prevent the harm of predatory creatures and artificially destroy fish. In the autumn, it should also be based on the growth of the fish to catch the market, reduce the density and promote the growth of fish.
(4) After the fall. Although the incidence of fish is reduced, due to increased feeding and fertilization, the water quality changes rapidly, and fish diseases still occur. Therefore, prevention of fish diseases should also be done. In addition to the quality of good feed and good environmental sanitation work in ponds, fish poisoning and baits should be regularly given for prevention. In general, throw a strong chlorine or net chlorine once a month, each time the concentration of the pond water was 0.3 mg / l; or quicklime water spill, each time with 667 square meters of lime 15 kg. At the same time, fed with Tertulin baits or sulfa drugs baits once a month, each feeding for 1-2 days, once a day. Fish disease was found, the cause was diagnosed in a timely manner, and measures were taken to control and treat it to prevent the spread of fish diseases.
Gauze roll
Structure and composition: It is made of 100% pure cotton thread and woven into plain weave cotton cloth of various widths, then, degreasing, bleaching and drying.
Product performance: It is white and odorless, soft to the touch, does not contain cotton leaves, cotton seed shells or other impurities, and has good water absorption performance.
Model specifications: Non-sterile type, roll type. The specifications are 90CM / 100CM / 120CM * 1000M / 1500M / 2000M, etc.
Packing: White chicken skin paper naked package, and then set with PE plastic bag, packaged with external woven cloth.
Scope of application: It is mainly used for raw materials of medical accessories and clinical use of medical units.
Zigzag Gauze,Medical Gauze,Medical Gauze Roll,Absorbent Gauze Roll
Shaoxing Gangfeng Hospital Products Co.,Ltd. , https://www.gangfenggauze.com