A small reservoir of fish to master four tricks

A small reservoir of fish to master four tricks

The small reservoir is generally between several tens of mu (1 mu = 1/15 hectare, the same below) to several hundred mu, the water depth is about 10 meters, and the dissolved oxygen and food are abundant. First, reasonable collocation, timely stocking of reservoirs is more predator than the pond, poor food basis, small fish species to avoid the ability to avoid predators is poor, feeding capacity is also low, so if the size of stocking fish species is too small, the survival rate will be lower, generally should Large species of fish larger than 13 cm in size can only be stocked with high catch rates and commodity rates. In terms of species collocation, fish farming using chemical fertilizers should be based mainly on alfalfa, and its production can account for more than 90% of the total fish production. The ratio of stocking turtles and cod fish is 4:1. With grass, cockroaches, eel species accounted for 20% to 30%. Reservoir stocking density, should be based on the number of food organisms in the water and how much fertilization, generally 200 ~ 500 mu, when up to the product specifications. It is better to store fish species in the reservoir in order to stockpile in autumn and winter seasons so that the fish species can adapt to the living environment of large water surfaces in advance. At the same time, due to the weakening of ferocious fish activity in winter and reduced food intake, the survival rate of fingerlings will be improved. Placement points should be chosen to be sheltered from the wind in the upper reaches of the sunny area, and should not be placed near dams and drainage gates. Second, to grasp a reasonable amount of fertilizer Fertilizer should be determined depending on the status of the water and the season to determine the amount of application, in order to apply after the transparency of 25 to 30 cm, water color yellow brown or brown green as well. From April to May, application of organic fertilizer is the main method. Organic fertilizer is applied at 250-300 kg per acre and applies inorganic fertilizer at the same time; inorganic fertilizer is used mainly from June to August, and nitrogen fertilizer is used in combination with phosphate fertilizer at a ratio of 2: 1, N fertilizer application 1? 5 ~ 2.5 kg / acre, phosphate fertilizer 2.5 ~ 5 kg / acre, applied every 10 to 15 days. The main nitrogen fertilizer is urea or ammonium bicarbonate, and the main phosphorus fertilizer is calcium superphosphate. The first application of phosphate fertilizer followed by nitrogen fertilizer cannot be reversed to avoid causing dead fish. The fertilization option was applied on the sunny day and the shallow water area of ​​the upper and middle reaches of the reservoir should be sprayed with water to avoid the thickets. Downstream deep water areas and close to the dam do not apply. Third, the prevention of fish disease is more important than the control of fish species before stocking must be disinfected; usually use quicklime or bleaching powder whole library sprinkling, regular high temperature season to adjust the water quality, found fish disease timely treatment, the general occurrence of gills, print disease, there is anchor head, Fish mistletoe. Bacterial disease can be used bleaching powder 1 g / cubic meter whole library spatter, parasitic disease can be used 90% crystal trichlorfon 0.3 ~ 0.5 g / cubic meter full library spill. Fourth, daily management must be put in place to give lime to improve the pH and hardness of the waters, increase calcium salts, promote water material circulation, improve water quality, help fish growth and inhibit the occurrence of fish diseases. Generally, 15 to 20 kg of lime is applied per acre, once a month. Prior to the stocking of the fish species, joint fishing gear was used to remove wild fish or drugs to kill wild fish. During the breeding period, seine fish and trawl nets should be used regularly to trap wild fish and improve the survival rate of the species. Small reservoirs for fertilization and intensive cultivation must have aeration equipment, transport equipment, irrigation and drainage equipment, anti-escape facilities, and fishing nets. In addition, the reservoir must have someone on duty, pay attention to understanding flood prevention, irrigation, etc., often check the fish stopping facilities, timely fishing floats, to ensure smooth drainage outlets, prevent fish escape. Regularly observe the water quality and check the growth of fish so that it can be used properly.

Tattoo tip is a tubes for needle go through and have different sizes based on the needle sizes. Normally,tips can be made by stainless steel and plastic.

Stainless Steel Tips can be sterile in autoclave and use many times,but plastic tips sterile packed and for disposable use.

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