The ecological cultivation mode of grass carp seedlings

With the rise of the grass carp frenzy, grass carp seedlings are becoming more and more tight. Grass carp seedlings have loose scales and low survival rates for long-distance transportation. In addition, the long-distance transport of grass carp seed due to poor physical fitness, the survival rate after the injection of vaccine is also low. In order to change this passive situation, qualified farmers can cultivate their own grass carp seedlings. In the cultivation process of grass carp fry, an ecological cultivation mode should be adopted to avoid the use of drugs that are easy to form drug resistance. There is no need to put too early on the time of grass carp seedlings. Do not overlook the seed quality and necessary preparations in order to seize the delivery time. The successful grass carp fry cultivation mode is described as follows: The main mode. This cultivation mode is similar to the cultivation mode of carp seedlings. The differences are mainly reflected in the following aspects: (1) The grass carp summer flower seedlings are soaked with grass carp summer flowers before soaking. (2) To feed grass carp, three-stage feeding mode should be adopted for the "two-nose fine intermediate" feed. After the fish seedlings in the pond, strengthen the feeding of compound feed, and stop feeding the compound feed when the length of the grass carp seed body reaches 6 cm. This is the first “fine feeding” stage. From the end of the first "fine feeding" period to the Lunar New Year, this stage is the high incidence of grass carp disease, the highest mortality of grass carp at this stage, commonly known as "Bai Lu Guan." In this stage, we must strictly control the amount of feed, the feed is mainly based on the high content of crude fiber, if necessary, can be matched with the appropriate amount of land tender grass to control grass carp eaten up, to control the length of disease prevention The purpose of this stage is the "extensive" stage. The incidence and mortality of grass carp at this stage have been greatly reduced from the end of the white dew to the end of winter, and in order to increase the overwintering specifications and overwintering physique of grass carp, this favorable opportunity should be seized to strengthen the fortification of grass carp before winter. This phase is called the second "finishing" phase. (3) Strengthen ecological prevention measures. The prevention of outbreaks of grass carp trichoproteriosis can be prevented by taking orally the "Kerbone King" and the ecological prevention measures such as hanging eucalyptus branches in the pool. The disinfection of the pool water should be mainly lime, and try to avoid the use of commercially available fishery medicines that are resistant to drug resistance. 2. Overdose mode. This cultivation mode is to put grass carp and summer seedlings in adult fish breeding ponds, and use the plankton and feed debris in adult fish ponds to cultivate grass carp seedlings without additional feeding. This model is low-cost and easy to promote. During the cultivation of grass carp fry, attention should be paid to the following points: (1) The use of insecticides is prohibited within 7 days before and after the fry feeding, in order to prevent fish fry abnormalities. (2) It is not necessary to feed special feed for seedlings. Some feed ingredients such as fine rice bran and wheat bran can be added to the general feed. (3) Use tight mesh when catching fish in winter to prevent grass carp damage.


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