Astragalus cage culture method

In culture methods, cage culture of Astragalus is a relatively new type of aquaculture technology. At present, it has become a new hot spot. Fishpond cage culture of Astragalus membranaceus has the advantages of less occupied water surface, less disease, high survival rate, rapid growth, and easy to catch and catch.

First, the choice of fish pond

In fish pond cage culture, the cage is set in an ideal fish pond. Astragalus has a strong adaptability to the environment and is benthic life. It is plentiful in shallow water with more humus. The fish pond is a habitat for cage culture of Astragalus membranaceus. The environmental conditions are good and will directly affect the growth of Astragalus membranaceus. The fish ponds of Astragalus membranaceus cultured in cages are required to meet the conditions of the refined fish ponds:

1. The topography of the fish pond is slightly higher, the leeward sun is sunny, the surrounding environment is quiet, the water source is sufficient, the water quality is good, and it is not polluted.

2. The shape of the fish pond should be as rectangular as possible, with an aspect ratio of 2:1 or 3:2.

3. The direction of the fishpond is from east to west. This will increase the sunshine time in the fish pond, and it will have sufficient dissolved oxygen. It will be beneficial to the photosynthesis of phytoplankton in the fish pond. It will maintain a certain degree of fatness in the astragalus aquaculture pond, which is beneficial to the supply of dissolved oxygen due to the main source of dissolved oxygen. Photosynthesis of phytoplankton in water. When the dissolved oxygen in water is more than 3mg/L, the activity of jaundice is normal, and it is also beneficial to the growth and reproduction of zooplankton cladocera and copepod in the fish pond, and increases the food intake of zooplankton in the pond. East-west is good for sheltering, which can reduce the wind waves between the north and the south and flush the fish bowl and the cage.

4. The area of ​​the fish pond is suitable for about 5 mu, the depth of the pond is 3m, the water depth is 2-2.5m; there is no sundries in the water, and the transparency is 15-20cm. The bottom of the fish pond should be flat and slightly inclined toward the drainage direction; the fish pond should be drained and drained naturally to avoid string irrigation. Prevent disease transmission.

5. There is ample source of animal feed and it is the basis for the development of eels.

6. The pond is better protected with cement or stones.

7. The horizontal and vertical directions of the pool should have a width of 2m to facilitate the manual operation.

Second, cage design

1. The cage structure requires good quality, the mesh should be fine, and it should be medium-sized open type. The area of ​​the cage is about 20m2. The cage is 5.4m long, 3.4m wide and 1.0m high. The water part is 0.4m and the underwater part is 0.6m. The minimum required for cage setup is 1.5m above water depth. The newly made cages must be soaked in water for three to five days. After the harmful substances disappear, they can be stocked.

2. The cage set box is fixed in the water with a bracket, the bracket is bamboo and angle iron, the cage is suspended on the bracket, and the four corners of the cage are connected on the upper and lower pulleys of the bracket, so as to facilitate the lifting, cleaning and catching of the cage. The inhabiting environment of the earthworms in the box changes with the change of the water level, and the width between the boxes is 1.5m.

Third, the breeding and feeding of quail species

It is the same as normal feeding.

Fourth, feeding and management

1.Water management to maintain a stable water level, attention to the summer sun work of the Astragalus, the water level should not be too shallow, to prevent the water temperature is too high and affect the growth of Astragalus, in the cage into the Anoectochilus, Eichhornia crassipes, water aquatic lotus and other aquatic Plants can effectively avoid the heat. Change the water in about 7 days in Spring and Autumn, change the water in about 3 days in summer, change the water volume to occupy 1/2 to 1/3 of the whole pool, decrease the temperature of pool water in winter, and stop the feeding of Astragalus, enter the hibernation state, and immediately perform antifreeze overwintering work. At this time, the water level should be shallow to keep the water level at about 1.2m deep, and a plastic film should be placed on the cage to prevent wind and cold.

2. Reasonable feeding and feeding amount should be determined according to the type of feed, water temperature, water quality and feeding conditions. The cages should be fed with low values ​​of small fish, snail meat, fly maggots and pupa. It is generally based on the food intake of Astragalus day. Tests, such as long-term use of a single feed, easy to produce antifeedant when changing the feed. In the time of artificial breeding, domestication work should be carried out from the very beginning. Huang Yugang has no need to feed baits within 2-3 days after entering the pool. Due to changes in the environment, the yellow locust will be suitable for a new environmental process. Gradually increase, after bait end, according to "four set" (quality, quantitative, timing, positioning) feeding. Due to the yellow pipa hikers burrowing during the day and feeding at night, they must be fed in the early evening and they should be fed a total of 6-7% bait per day. The bait should be cleared in the next day. About 15 days or so, the Astragalus membranaceus adapts to the environment of the box, and the feeding time is divided into two parts. Every day, at 8 am and 6 pm, the number of feedings should be adhered to every day. Because the bait is seriously lacking, the astragalus will eat each other. When the water temperature drops below 10°C, feeding can be stopped. When the water temperature is 20-28°C, the food intake of Astragalus is very strong. When the water temperature exceeds 29°C, the food intake also decreases. Therefore, it is only necessary to adjust the daily water temperature below 20°C or 29°C. Feed it once.

V. Disease prevention

Farming fish ponds should be cleaned and disinfected, and quail species should be sterilized and stocked; fresh fish should be put in, and rot-deteriorated bait should not be thrown in; patrol pools should be regularly observed to observe the feeding and activity status of the scutellaria baicalensis, and the disease should be promptly removed and used for diagnosis and treatment.
In cages, pudding disease (Putrid-skin &nbspdisedse) mainly occurs in the fall. After carcass injury, it is caused by bacterial infection. The main symptoms of the disease are sickly and congested on the body surface, oval-shaped erythema, and most of the abdomen on both sides of the abdomen. Obviously, the surface punctuates when severe, forming irregular holes. Control measures, using bleaching powder (containing 30% of available chlorine) dissolved in water, then Quanchiposa, so that the pool water into 1-1.2ppm concentration has a certain effect.
Fever in individual cages is caused by the high density of Astragalus membranaceus. The mucus produced by the body surface is accumulated in the water and fermented. The temperature of the water rises, and the jaundice is restless and entangled with each other. Preventive measures include the use of a small amount of muddy fish in the Dianchi Lake to prevent entrapped jaundice through muddy lofts, and to immediately replace new water, increase oxygen, and control disease.

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