1. Stocking density of hatchlings
hatchlings before the third wintering , The weight is about 6-100g, and the individuals are relatively small. Although they are relatively mild in character and will not kill each other, they will compete for food, so they cannot blindly increase the stocking density because of their small size.
2-3 year old hatchlings are generally recommended to be fed separately, the stocking density of 2-year-old hatchlings is 50-80/m2, and the stocking density of 3-year-old hatchlings is 20-30/m2 , If the breeding experience is insufficient, it is recommended to reduce the stocking density first. In addition, 5-10 silver carp, crucian carp and other summer fish species can be placed in the turtle pond, which can help to regulate the water quality.
2. Feeding and management of hatchlings
(1) hatchlings Diet
It is generally recommended to feed the hatchlings with compound feed, the protein selection should be controlled at about 28%-32%, and the feeding amount each time is about 3%-5% of the total weight of the hatchlings. Feed twice, once at 8-9 am and once at 4-5 pm. Some green fodder such as chopped melon rind and green cabbage leaves can also be appropriately added to the feed.
(2) Water temperature management
It is generally recommended that the water temperature for raising hatchlings should be controlled between 28-30°C. If the water temperature is lower than 15°C, the hatchlings will enter a state of hibernation , neither eat nor drink. In addition, the water temperature should be kept relatively constant. If the original water temperature has been controlled at 30 ° C, but suddenly drops to 28 ° C, the hatchlings will be affected by the sudden change in temperature, which will affect their feeding activities, and then their growth will be stunted.
In addition, light is also very important for the growth of hatchlings. Turtles have the habit of basking their backs. Appropriate light can promote the absorption of calcium by turtles, which is conducive to the growth of carapaces. Therefore, the turtle pond should be prepared with enough sunbathing platforms. If the living environment of the turtles does not have natural light, artificial light should be used to meet the needs of the young turtles to bask their backs.
(3) Water quality management
The pH value of the water body suitable for hatchlings to survive is 7.5 to 8. The water quality should have a transparency of 30-40cm and the color is light green. If it is a large-scale breeding turtle pond, sprinkle quicklime once, and intermittently inflate it for more than 8 hours every day, and the aeration time at night should be slightly longer.
Secondly, the water should be changed regularly, because a large amount of turtle feces and leftover bait will be deposited at the bottom of the pool, so it is recommended to use the method of pumping, and 1/3 of the old water is drawn out each time, and then Add fresh water. The temperature difference between the new water and the old water should not exceed 5°C to avoid sudden changes in water temperature and affect the feeding of the hatchlings.
Finally, you can also plant some green phytoplankton or photosynthetic bacteria in the turtle pond, such as water lotus, water hyacinth, duckweed, etc., the proportion of the area should not exceed 1/4, these plants can reduce the water body The content of nitrogen and phosphorus in the water plays a role in cleaning the water quality, but if the growth is too strong, pay attention to properly fish out a part.
