Breeding Techniques - Some Experiences of Mixed Fish and Ducklings
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(I) Pond Construction
The pond should be chosen where there is sufficient water, good water quality and convenient transportation. Ponds are east-west, rectangular, with a width of 2-3:1, and the inner slope of the pool is 1:2-2.5. This type of pond has a long sunshine time. The bottom of the pond is required to be flat, and the side of the drainage can be slightly inclined to facilitate dry ponds. The area of ​​the pond is 0.67-1.33 hectares, and the depth of the pool is 1.5-2 meters. The pond is equipped with inlets, outlets and fish-stopping facilities. For the existing shallow, small, dry old ponds, the requirements for the new ponds can be changed.
(two) duck shed construction
The duck shed should be located in a south-facing area with high ground, sunny, and relatively dry place. In winter, it can seal and insulate, in the summer, it can be ventilated and cooled, and the rainy season is well drained. Duck shed area 120-150 square meters. There are two activity venues. The first is to use the old mesh or a corner of the fish ponds (not more than 1/4 of the total area of ​​the pond) as an activity pool. The second is to use a bamboo fence around the duck shed to surround a pool or pool slope as an activity field, which can be twice as large as the duck shed.
Second, fish and duck polyculture production configuration
The fish-duck mixed-feeding mode takes the water as the center and fish-dominated fish and ducks are rationally configured to achieve duck-promoting fish and fish and duck harvests. In general, the following two polyculture modes can be adopted: First, 50-60 kg of fish per 0.067 hectare, 70%-80% of filter-feeding fish, and 6-7 times of weight gain for fish species, per 0.067 hectare of water Ducks are equipped with 60-80 feathers, and the breeding yield can reach 300-400 kilograms. Third, 75-85 kg of fingerlings per 0.067 hectare, 70%-80% of filter-feeding fish, and 6-7 times of fingerling weight, 100-200 feathers per 0.067 hectare of ducks. Produce 500-600 kilograms.
According to the practice of aquaculture production, generally, each year of raising a duck can produce as much as 3 kg of filter-feeding and omnivorous fish.
Third, fish and duck breeding and feeding
(a) Fish farming. (1) Clear pond. The fish species were not placed in front of the pond, and the ponds were to be disinfected. Each 667 square meters of lime used 70-100 kg of lime and spread evenly throughout the pool. (2) Disinfection of fingerlings. In front of the fish ponds, the fish was soaked in 3% salt solution for 5 minutes, and grass carp was injected with the vaccine for immunization prevention. (3) feeding. Feed is a material source for fish growth and a material basis for raising fish production. Therefore, it is necessary to feed a well-balanced, good-quality, palatable feed. Daily feeding can be calculated according to the total body weight of 1%-5%. (4) Water quality. As the saying goes, to manage a pool of fish, you must first manage a pool of water. Pool water should be kept fat, live and cool. The transparency is controlled at about 30 cm, and the pH of the pool water is maintained at 7-8. (5) Diligent patrol ponds, do a good job of preventing escape, preventing disease, preventing floods, and preventing theft.
(b) Ducks. (1) Adopt scientific breeding to achieve a reasonable mix of feeds, regular quantitative feeding, no mildew feed, and sufficient drinking water. Temperature, humidity, density, fresh air. (2) Prevention and treatment of diseases is an important part of the development of duck production. Therefore, one must do a good job of cleaning duck sheds and adhere to disinfection measures. People do not enter the duck sheds arbitrarily and eliminate the source of infectious diseases. Second, ducks were injected with a vaccine to prevent duck plague at 30 days of age. Fowl cholera epidemic prevention occurs at 70-80 days of age.
Fourth, fish and duck polyculture, duck to promote fish
(a) Ducks can increase oxygen for fish. The ducks are active and the ducks swim in the pond. Splashing water splashes the air and allows the air to continuously infiltrate into the water, which is beneficial to increase the oxygen content in the middle and lower layers of the fish ponds.
(b) Ducks can serve fish. First, there is a large amount of non-absorbed organic matter in duck dung, which is converted into plankton to provide fish with bait. The second is that the ducks constantly stir the pond water, which can promote the decomposition of organic matter in the sediment pool, accelerate the spread of organic debris and bacterial condensate in the pond mud, and provide feed for fish.
(c) Ducks can kill fish
Ducks are omnivorous poultry. They can not only eat sick fish and dead fish floating in fish ponds, thereby reducing the spread of pathogens, but also can invade fish and other fish and other fish. Ducks can also remove moss, algae and other harmful substances that grow in the pond.
Agar-agar is a natural vegetable gelatin counterpart. White and semi-translucent, it is sold in packages as washed and dried strips or in powdered form. It can be used to make jellies, puddings, and custards. For making jelly, it is boiled in water until the solids dissolve. Sweetener, flavouring, colouring, fruit or vegetables are then added and the liquid is poured into molds to be served as desserts and vegetable aspics, or incorporated with other desserts, such as a jelly layer in a cake.
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