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Artificial warming and high-efficiency breeding of soft-shelled turtle
The growth rate of the soft-shelled turtle is slow, and it usually takes 3 to 4 years to reach the commercial specifications of about 500 grams. In general conditions, the growth rate of outdoor natural turtles is: when hatched, it grows 2 cm to 3 cm long and weighs 3 g to 5 g; at the end of the first year, it grows 3 cm to 5 cm and weighs 5 g to 15 g; At the end of 2 years, it is 8 cm to 10 cm long and weighs 50 grams to 100 grams. At the end of the third year, it is 12 centimeters to 15 centimeters long and weighs 130 grams to 250 grams. At the end of the fourth year, it is 15 centimeters long and weighs more than 500 grams. The main reason for the slow growth of soft-shelled turtles is the longer period of hibernation. If artificial heating is used to break the period of hibernation, the growth rate can be accelerated and the cycle can be shortened to 12 months to 15 months. The artificial warming of the soft-shelled turtle is rapidly aquaculture, and it is divided into four types according to the different heating methods: boiler heating, electric heating, hot spring water, and factory waste heat. The time generally begins in late September and ends in mid-May. Before the turtles move in, the ponds should be bleached for disinfection and then filled with water. The water temperature should be adjusted to about 30°C and then fed into the turtle. Stocking density can be doubled compared to conventional farming, and feeding management is similar to conventional farming. The emphasis is on strengthening water quality management, controlling water temperature and ensuring sufficient light. It is best to change the water once a week. When changing the water, you should pay attention to the difference between the new and old water temperatures. In the second year of May, when the outdoor water temperature reaches 13°C to 25°C, it can be moved to outdoor breeding. However, a few days before the removal, it is necessary to gradually reduce the water temperature, so that the turtle has a process of adaptation.