Winter technical management measures for astragalus cultivation
The ancients said: "The winter is cold, and the sky is serious, and the seasons are closed." Everything must be quietly hiding. This is also the main point of Huang Xie’s winter management. The first is to let Huang Huan have a quiet and hibernating environment, otherwise it would be impossible to solve the possible frozen disaster.
I. The Premise of "Tibetan"
Under normal feeding conditions, Astragalus no longer feeds at temperatures below 13°C; however, if nutrition is poor during the fall, the nutrients accumulated by Astragalus will not be enough for wintering. In spite of the decrease in water temperature, Astragalus is still not “hiddenâ€, even if the water temperature When it falls to 3 to 5°C, it also has an appetite for food. This situation is extremely unfavorable for wintering. Particular attention should be paid to the fact that they often catch large amounts of goods and leave behind innocent little yellow eels. The majority of these yellow eel's frailties are caused by the long-term lack of sufficient food. If the goods are caught and they do not have time to eat in Xiaoyan, in the winter, these little pupae will not be able to calm down and overwinter due to lack of energy. This will not be what we have requested. It is a stable wintering goal.
2. When the temperature before the winter is nearly 13°C, change the water frequently and perform an aerobic disinfection. The specific method of operation is as follows:
1, air change water.
Insert the air hole into the mud trench with steel boring, requiring deep insertion to the bottom, one hole for every 20 cm. When there are no air bubbles in most air holes, drain all the water in the pool, and use a small squeegee to sifted the surface of the pool. Lime. After 48 hours in the dry pool, the treated water was poured into the top of the loach. 2 hours after the treatment water is poured, the water level is lowered to a depth of 10 cm. 12 hours after the large flow of water for 1 to 2 hours.
2, ozone sterilization.
The ozone sterilization aerator can be used to sterilize the bottom of the carrier, and calcium dioxide can also be uniformly dispersed into the bottom of the machine at the same time. The boot time is about 1 hour. Dianchi pool every 10 square meters set 2 disinfection holes can be turned on 2 times.
3, add oxygen.
After the disinfection aerator is shut down, all disinfection holes are blocked with wet grass and filled with pool mud. Then open the bamboo cap and infuse calcium dioxide. The dosage and perfusion method will be the same each time.
4, put the water stamped.
Once the temperature has dropped to about 10 degrees, the pool water should be immediately drained. After the mud surface is slightly dried, it is covered with a layer of rice and wheat straw about 20 cm thick, and the water in the buffer pit is filled. Covered rice and wheat straw should be covered in two layers, in which the lower layer should be sterilized and covered. The method is to immerse the grass in 5% quick lime aqueous solution, and after 24 hours, pick up and drain the surface water, then you can directly cover the mud and muddy ditch in Dianchi. After covering about 10 cm in thickness, cover it with about 20 cm thick hay.
Third, the winter management
To keep the tranquility of Dianchi Lake as the goal, we aim at the safety of Huang Qi. The main management indicators are: no rat in the grass; no water on the mud surface; water in the pit.
1. No rat in the grass.
In the cold winter months, many animals like to nest in grass, such as rats, cats, crickets, crickets and so on. These animals are very sensitive to smell, so long as they are selected for the nest, they will inevitably dig for food. There are many methods for prevention and control, which can be covered with a fine mesh or plastic film at the top of the wall of the Dianchi Lake, and electric cats can also be placed.
2, no mud surface.
The so-called mud surface waterless refers to the ice-free season when there is no ice on the mud surface. Otherwise, there is the possibility that the scutellaria baicalensis may be frozen and cause hypoxia suffocation. In general, as long as the noodles on the surface of the rice bowl are frozen, the mud surface will not freeze. Once the mud surface was frozen, ice soil isolated the exchange of the Dianchi carrier and the gas of the earthworm, resulting in a lack of oxygen in the carcass and awakening, causing restless disturbances, even upward agitation, increased oxygen consumption, and finally died of suffocation. In order to solve this problem, on the one hand, the ice-breaking ventilation must be timely, and on the other hand, mud area water must be further removed to thicken the insulation layer and be covered with a non-drip plastic film to intensify the insulation.
3, there is water in the pit.
It means that the intake buffer pool of Dianchi Lake maintains a certain amount of water. The overwintering of Astragalus is assisted by breathing through the lateral holes and draining holes of the skin hole. This respiration is accomplished by exchanging body fluids in the body and mucus in vitro as a carrier. This kind of mucus is inseparable from water, but the amount of water needed is not very large, as long as the water content of the carrier reaches 60%. As long as the buffer pit can maintain a certain amount of water, it can be foolproof.
In addition, winter management still insists on patrol pools. Once problems are found, they must be dealt with promptly. Otherwise, it may cause irreparable damage.
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