Technique of raising soft-shelled turtle in paddy field

The culture of soft-shelled turtle in rice field is a kind of ecological aquaculture, the environment of rice field is suitable for the growth of soft-shelled turtle, the growth temperature of rice is also the suitable growth temperature of soft-shelled turtle, there is abundant natural bait for soft-shelled turtle in rice field, and rice can provide shade for soft-shelled turtle at high temperature. The soft-shelled turtle's activities enable it to dredge the field mud, which is not only conducive to fertilizer decomposition, but also promote the root development of rice. Soft-shelled turtle feces are good fertilizers for rice. Soft-shelled turtles can avoid using chemicals by preying on field pests. The rice produced reaches the pollution-free or green standard. In 2006, Xinhe Village in Huaiyuan County conducted an experiment on ecological culture of soft-shelled turtle in rice fields with 10 mu of paddy fields. The juvenile soft-shelled turtle weighed only 250g per mu, which could grow to the market specification in the same year. The good benefit of producing soft-shelled turtle 209kg per mu in rice field and making a profit of 7270 yuan was obtained.

Technical points of cultivating soft-shelled turtle in rice field

The basic conditions of the cultivation of soft-shelled turtle rice fields generally require good water retention, no leakage, sufficient water sources, no pollution, convenient drainage and irrigation, the accumulated rain surface of rice fields should be small rather than large, and low-lying fields, pond fields and fork ditch fields should be selected. Clayey soil with 15 20cm depth of clay layer and neutral or weakly acidic ph value of water body is the best soil quality.

Design and requirements of field engineering

1, anti-escape facilities: first, strengthen the heightened ridge of the field, which should be about 40cm higher than the surface of the field, hammering and tamping, and the agricultural film can be inserted into the mud 10cm to protect the ridge to prevent loopholes, leakage, collapse and make the soft-shelled turtle escape. Second, the inlet and drain should be equipped with fish blocking equipment to prevent soft-shelled turtles from drilling and escaping. Wide 90cm and high 45cm can be used to weave bamboo strips into arched fences with pores of 3cm, which not only will not make the soft-shelled turtles escape, but also increase the water intake area, which is conducive to controlling the water level of the rice field and avoiding heavy rain. This equipment is particularly important. The whole rice field should be guaranteed not to be flooded during the flood season.

2. Excavation of temporary cultivation ditch: a temporary cultivation ditch with a width of 2 "3m and a depth of 1" 1.2m is excavated on one side of the paddy field. The area of the trench accounts for about 4% of the area of the paddy field, which is convenient for catching later. And build a north-south beach on one side of the temporary culture ditch for its back drying.

3. Excavate ring trench and field ditch: dig annular trench along the inside of the surrounding ridge, 0.5-1m from the ridge, with a width of about 1m and a depth of 0.5m. In the field of about 3 mu, cross or #-shaped field ditches (0.5m wide and 0.3m deep) should be dug. The ditches are connected to each other, which is convenient for catching later. The total area of the ditch can generally account for about 12% of the rice field area.

4. Set up the dining table. There are 4 to 6 tables per mu of rice field.

5. Before the release of juvenile soft-shelled turtle, the ditches and ponds of rice fields should be thoroughly cleaned and disinfected, generally sprinkled with quicklime 100kg in the whole pond per mu. At the end of June, when the rice seedlings turn green, drain the field water, bake the field, and then add water, the water deepens to 15 30cm, the young soft-shelled turtle can be put into the field, with an average of about 330larvae of 250g/ per mu, and washed and sterilized with 5% salt water.

Daily management of raising soft-shelled turtle

1. In addition to feeding small fish, shrimp, corn, wheat, pig pancreas, pig liver and other feeds, full-price compound feed is mainly used. July-September is the peak feeding season for soft-shelled turtles. They are fed once in the morning, in the middle and in the evening. The daily feeding amount is 5%-7% of the weight of soft-shelled turtles, and the daily feeding amount is 3%-5% of the body weight of soft-shelled turtles.

2. Water quality management insists on inspecting the fields once a day in the morning, in the middle and in the evening to observe the activities of soft-shelled turtles and check the water quality. Fresh water should be injected once a week to keep the field water depth at 15 20cm. In the high temperature season, the water level should be deepened as far as possible to prevent the water temperature from being too high.

3. in order to prevent the disease of soft-shelled turtle, the temporary culture ditch, ring ditch and field ditch were disinfected with quicklime regularly during the feeding period.

4. Rational use of pesticides Rice should apply pesticides with high efficiency and low toxicity as far as possible and spray them on rice stems and leaves to avoid drugs falling directly into the water. After applying pesticides, new water should be injected in time to improve water quality conditions to ensure that there is no harm to soft-shelled turtles.

Key points of management of soft-shelled turtle hatching

1. Strictly control the water content of sand bed. The humidity of sand bed is too high or too small, which directly affects the hatching and survival rate. Generally, the hatching rate is the highest when the humidity is 80%-85%, so the humidity should be checked regularly and the moisture should be sprayed at the right time.

2. Keep the hatching temperature as stable as possible, the optimum temperature is 25-36 ℃, and the hatching rate is the highest when 30 ±3 ℃. If the temperature change during the incubation period exceeds the suitable range, the temperature should be adjusted by electric fans and stoves as far as possible.

3. The water for hatching should be fresh, non-toxic, harmless and pollution-free. The temperature of the sprinkler should be equal to or similar to that of the sand bed. Do not use hot water that is too cold or higher than 36 ℃.

4. Prevent enemy organisms such as ants and mice from invading and harming fertilized eggs or young turtles.

5. After coming out of the shell, the juvenile soft-shelled turtle should be allowed to move freely in the sand plate for about 2 hours. after removing the embryonic serosa and umbilical cord, the juvenile soft-shelled turtle should be drenched and disinfected and put into the breeding pond.

With the continuous rise of people's living standards, soft-shelled turtle has gone to the dinner table of thousands of families, many ordinary families, many high-end hotels have soft-shelled turtle, the nutritional value of soft-shelled turtle is very rich, many people like to eat very much.