Aspects needing attention in winter shed culture of soft-shelled turtle

At present, the primary task of soft-shelled turtle farmers is how to culture safely and spend the winter, so as to lay the foundation for pond culture at the beginning of spring. For this reason, the author introduces the valuable experience of soft-shelled turtle culture in greenhouse as follows, for the reference of farmers.

First of all, the temperature should be kept stable and should not change much. Soft-shelled turtle (soft-shelled turtle), as a kind of semi-aquatic variable temperature animal, is very sensitive to the change of ambient temperature. too high or too low temperature or sharp changes in temperature are not conducive to the survival, growth and reproduction of soft-shelled turtles, especially juvenile soft-shelled turtles and young soft-shelled turtles. The optimum water temperature for the growth of soft-shelled turtle is 28-32 ℃. Beyond this range, the feeding and growth of soft-shelled turtle will be affected. The daily variation of water temperature should be controlled within 1-2 ℃, and not more than 3 ℃. Drastic changes in water temperature will make it difficult for juvenile soft-shelled turtles to adapt to physiological regulation, and the metabolic process of the body is prone to disorder, which is more likely to lead to diseases, such as colds and so on. In overwintering culture, light is easy to be ignored. After the beginning of winter, the sunshine time is relatively short, and the light can be replenished properly in the winter shed. According to the relevant research data, supplementary light can significantly improve the growth rate and survival rate of soft-shelled turtle. At present, many farmers have ignored this point, it is suggested that you might as well try. Temperature and humidity should be properly controlled in winter. If the tightness of the greenhouse of farmers is good, ventilation can be increased appropriately. For the north-south-trending greenhouse, it is suggested that the ventilation flow can be increased in the south and slightly smaller in the north, while in the east-west direction, the ventilation can be increased in the east and west, and the strong light at noon can appropriately increase oxygen for 1-2 hours to promote the discharge of carbon dioxide from the low-level water. it is beneficial to the growth of juvenile soft-shelled turtles and young soft-shelled turtles. Humidity below 40% is ideal, which is easier to control before the Beginning of Spring, and will rise after the Beginning of Spring, so pay attention to the reasonable control of ventilation and humidity. In winter, the management of water quality is stricter than that in other seasons. The water quality index of winter shed is the most likely to deteriorate the content of ammonia nitrogen, generally controlled below 0.3ppm is more ideal, too high ammonia nitrogen soft-shelled turtle is easy to produce gastrointestinal discomfort, and lead to rotten skin, rotten legs, mouth and other diseases. In the control of water color, transparency and pH, it is best for water color to keep yellowish green. If the water color is too thick, fine-tune it with an appropriate amount of quicklime, put in an appropriate amount of photosynthetic bacteria and bacillus, and turn on an aerator to cultivate water color at noon. In this way, the dissolved oxygen in the water will be more ideal, which is more conducive to the growth of juvenile soft-shelled turtles and young soft-shelled turtles. The overwintering juvenile soft-shelled turtle and juvenile soft-shelled turtle are small and have poor resistance. in addition to ensuring good feeding, greenhouse culture should also properly add compound multi-dimensional, microbial preparation, liver-protecting and gallbladder-promoting Chinese herbal medicine to protect the function of intestines, stomach, liver and gallbladder. Make it a guarantee to improve the survival rate and growth rate.