It is the time of the year when the spring is in full bloom, the buds are pregnant, the fragrant flowers are brewing, and the embryos are red and purple.
For koi fish, this is also a good season for breeding and breeding, and what kind of "small splashes" will hatch in the future depends on whether we can grasp the breeding period.
So, what should be paid attention to in spring koi breeding?
Eugenics
In order to achieve the goal of koi eugenics, choosing a good broodstock is the first step.
On the body of the fish, the female has soft and convex epsom pores, a plump body, a smooth body surface, and the outline of the ovaries can be seen. The male fish has a hollow and firm pores, a strong physique, a slender body, and no feeling of poop with a big belly.
In terms of age, the optimal breeding age for female koi is 3-6 years old, while the best breeding age for male koi is 2-4 years old.
In terms of numbers, male broodstock should usually be twice as large as female broodstock.
In addition to the good size, texture, pattern and pedigree of the broodstock itself, it is also necessary to test, observe and screen through different combinations to select the best genetic performance and ensure the quality of the offspring. Therefore, in order to breed good koi, a strong breeding fish bank is very important!
The spring cold must be guarded against
In the cold season of spring, the water temperature will be low, and attention should be paid to the prevention and control of water mold and melon worm disease. When the alternation of cold and warm is frequent, it is necessary to closely observe the feeding and growth of koi fish, and change the water in time. On a low-temperature and rainy day like the one in Guangdong recently, it is not only necessary to avoid frightening or damaging the koi fish by pulling the net to exercise the high-quality author list, but also to moderately reduce the amount of feeding. 
The "delivery room" should be well arranged
When breeding, the nest is hung in the farrowing room (spawning tank) for the eggs to attach. It is recommended to choose a hatching brush with a soft texture and strong adhesion to make a fish nest, and the mountain tree hatching brush is the best choice for koi breeding.
The soft texture of the mountain tree hatching brush simulates the natural aquatic and weed environment, which is conducive to the smooth spawning of female fish; Strong adhesion, can improve the egg collection rate and hatchability.
Seize the moment
For the south of the Yangtze River in China, April is the best breeding period, but the climate is different from place to place, and it still depends on the actual water temperature conditions. Generally speaking, koi fish breeding can start when the water temperature rises above 20 degrees.
In particular, it should be noted that the weather is volatile before and after Qingming, which has a great impact on the hatching rate. And in May, the gradually hot weather will also affect the fertilization rate. Therefore, the timing of reproduction should be grasped.
Pamper the hatching
After the eggs are produced, they should be transferred to the hatchery tank in time to avoid being eaten by the broodstock, and the water temperature of the hatchery should be consistent with the spawning tank.
The hatched child fish will be attached to the nest with the attachment organs on the body, and will remain in a state of not eating until the nutrients in the yolk sac are absorbed, and then they will start swimming to feed, and then they can start feeding the bait.
In this vibrant spring, sowing the small fry of lucky koi, looking forward to the harvest season, the hard-working carp breeders can harvest one after another, pond after pool of fine koi, in the sweat of the smile!
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