Artificial breeding Astragalus has good benefits and is a good way to get rich. The selection of seedlings for raising yellow plants is an important step and is the key to successful breeding. At present, there are many kinds of swindlers in the supply market, and there are more swindlers. The main performances are in two aspects: first, some people will use the wild sassafras seedlings that they purchase as artificial breeding seedlings; second, they use common sapling seedlings to serve as Thailand's giant maggots, giant scorpions, and hybrids. And so on, its realization is nothing at all about hybridisation and extraordinarily rampant, and true Thai tadpoles are not suitable for our climatic conditions. Therefore, farmers engaged in the cultivation of astragalus must learn to identify and select the seedlings of Astragalus, so as to make their own breeding of Astragalus less detours.
At present, jaundice can be generally divided into three types: The first one is a body color yellow and has a large spot. This fleas species grow faster, and the enthusiasm for meat production per kilogram is as high as 5-6 times; the second is body. The color is blue and yellow, and this kind of growth is generally 3-4 times that of the production of wolfberry per kilogram. The third type is sallow yellow with fine spots. This type of fleas grows quickly and is produced in kilograms per kilogram. The meat multiplier is 1-2 times. It can be seen that all species that are yellow and have large spots are good species.
Appearance to identify the number of artificially cultivated yellow earthworm seedlings is limited, the real artificial domestication of the cultivated yellow rice seedlings for the depth of rhubarb or golden yellow spotted turtle, suitable for artificial breeding, wild yellow quail mostly variegated pupa or gray light yellow quail, not artificial breeding. He is healthy and active. He can raise his hands and struggle vigorously. If the body is distorted, there is erythema, the anus is red and swollen, and the tail is twisted with poor quality.
Test with compound feed. Artificially acclimatized high-quality seedlings are fed on the basis of regular, quantitative, fixed-point feeding of high-quality compound feed or quail, and domesticated high-quality jaundice seedlings can normally feed, and wild jaundice seedlings or poorly-constructed nymphal seedlings cannot be eaten. Formulated feed or meal. When purchasing yellow seedlings, they must go to a regular farm and see for themselves whether or not the astragalus feeds on compound feeds or alfalfa. Do not eat alfalfa seedlings.
Through the appearance of the identification of high-quality seedlings for the dark yellow large spotted turtle, the body surface color is dark yellow, body shape, with black spots. After artificial domestication and cultivation, with compound feed and male breeding, 20 grams of seedlings can be kept for up to 150-250 grams for 5-6 months. For other varieties of seedlings, the growth of 5-6 months is less than 1 time.
The drug soaked in each liter of water plus 6 grams of copper sulfate was used to soak the seedlings, or soaked in 10 grams of water per cubic meter of water for 15 minutes. The good quality yellow seedlings can move regularly in the potion and finally stay at rest. Poor quality yellow seedlings and diseased and injured yellow seedlings do not.
Price based on the identification of seedling prices can also be used as a reference. Saplings are about 20% more expensive than commercial fish. If the price of Saplings is too high or too low, such seedlings should be given more attention.
In the case of normal cultivars, the superior seedlings were dark yellow plucked. The corpus callosum has a dark yellow color, a standard body shape, a slender body, and a round body, accompanied by brownish-black stripes. The medium seedling is a pale yellow spotted turtle. The body shape is also lighter than the standard body. The body has relatively dense brown markings and strong vitality. However, the growth rate is not as good as that of the deep yellow spotted turtle. Inferior seedlings are blue-gray cockroaches. The eel is slender, with a pale blue-gray body and fine brown-black markings.
The behavior screening method can be observed in the shallow water and soilless pool. The good quality seedlings are drilled to the four corners in groups and walked alone. Those with poor vitality are of poor quality. Can also be selected according to the habit of squid drilling burrowing, put the seedlings into the pool for about 2 hours, and those who do not drill holes or not drilling are of poor quality.
The water flow screening method squid likes to reverse the water line. With appropriate force to stir the water in the Dianchi Lake in a certain direction, the squid swims in the opposite direction, and it is a normal phenomenon; the person following the water is not good quality.
In the startle screening method, shallow carp-filled carp seedlings were used for screening. Good quality squid leaped out after taking the pot, and those who couldn't jump or jump were inferior scorpions, but the squid was injured or sick and jumped out. Carefully identify.
Feeding screening method was used to feed 5% of squid or 3% of tenebrio molitor. When the temperature was higher than 20°C, if the squid could feed more than half of the feed within 2 hours, the squid was of good quality.
Salt immersion method uses 3%-5% of salt water to pick, 4-5 minutes within the body will be severe injuries will run away, poor health of the species will occur coma, weakness and body deformation, these In the case of commercial fish processing, larvae are selected for stocking in the normal bred species in salt water.
The deep-water pressurizing method puts half a barrel into the fish bucket, fills the water and covers the lid. After 5-10 minutes, lift the lid to observe the behavior of the catfish in the bucket, float on the surface of the water, and extend the head. The surface of the water is resistant to hypoxia, weak constitution, and has been culled from the fleas with injuries. The burrowing pods that are immersed in the bottom of the tank can be kept in stock.
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