Is it feasible to breed Rana chensinensis artificially in China? The artificial propagation of Rana chensinensis (Rana chensinensis) in China was successful. We were appraised by1June 65438+1October 65438+June 6, 1995 by the Municipal Science and Technology Commission. It is considered that the research and development of artificial breeding technology of Rana chensinensis in China conforms to the theory of ecological economy, and multi-level comprehensive utilization is of great significance to protect resources and accelerate the development of large-scale agricultural economy. Staged achievements have been made in solving the key technologies of artificial breeding of Rana chensinensis in China, which has practical value. The large-scale realization of artificial breeding of Rana chensinensis in China provides a material basis for the basic theoretical research and breeding of Rana chensinensis in China. The research on artificial breeding technology of Rana chensinensis in China is the first in China in terms of high density and large area intensification, reaching the advanced level of similar research in China. The industrial production of Tenebrio molitor solved a big problem of artificial bait for large-scale cultivation of Rana chensinensis. At the leading level in China.
What is the key to the success of artificial breeding of Rana chensinensis? A: 1. To completely simulate the natural living conditions in the wild, there are water and three layers of vegetation. 2. There are good escape prevention measures. 3, there are strict measures to prevent the enemy. 4. Adequate bait (Tenebrio molitor). 5. Good wintering conditions. If all the above points are solved, artificial breeding of frogs will be successful. On the other hand, if you don't do something, you will fail.
Is it true that the forest frog has grown to 50 grams in a greenhouse without dormancy?
At present, many people are speculating on this thing. For your own income. We raised China Rana chensinensis for two years, and it didn't grow to 50 grams. Why did it grow to 50 grams that year? Breeding without dormancy can succeed. But we don't want to do it in the cold winter in the north. The cost is high and there is not enough money to sell the goods.
How can we raise Tenebrio molitor to feed frogs? A: Tenebrio molitor is easy to raise, and we have also summarized a set of methods. Tenebrio molitor is the main feed for raising forest frogs. Some people raise frogs when they get a little worm, but after feeding them for a while, they are gone, and raising forest frogs fails. Tenebrio molitor is easy to raise and reproduce quickly, but it needs a certain number to reproduce synchronously because its growth cycle is about 120 days. It is necessary to raise bugs in advance, so that big frogs can eat big bugs and small frogs can eat small bugs. For example, raise frogs next year and raise insects this year, so as to ensure the dosage. In spring, summer and autumn, when the temperature is good and the food is cheap, we will raise more and feed more. In winter, when the weather is cold and the food is expensive, we will raise less. Only in this way can efficiency be improved.
China Rana chensinensis and Tenebrio molitor can be raised in southern China. Many friends from the south called to ask about the artificial breeding of forest frogs. China wood frog is a special product in the eastern mountainous area of Northeast China. It must live in a cold forest. The forest frog in the south is definitely different from the forest frog in Changbai Mountain in the northeast. Those who want to breed can introduce a small amount of trial planting in the northeast. Look at the results (output and quality of frog oil). Pay attention to a couple of dozens or hundreds of pieces fried separately. (About Tenebrio molitor can be cultivated on a large scale in all parts of the country, and it is also a project to get rich. )
How to answer the quotation of forest frog: forest frog is a specialty of our eastern mountainous area. The oviduct of its female frog is called frog oil, which is a kind of advanced nutrition and health care product. The domestic and international markets are in short supply, and the price per kilogram is about 1200- 1400 yuan. There will be no problem in the market for several years.
Prevention of forest frog diseases 1. The construction of forest frog farm must meet the requirements of disease prevention.
The water source of forest frog farm should be pollution-free. Harmful polluted water will damage the health of wood frogs, and infectious diseases will occur quickly in the water, so the water source must be clean and pollution-free.
2. Control and elimination of pathogens
① Regular disinfection Generally, aquaculture equipment such as ponds and frog pens are thoroughly disinfected every spring or autumn.
Commonly used disinfection drugs are: quicklime: dissolved in water into lime milk and sprayed.
Bleaching powder: dissolved in water and sprayed, 1 week later, the drug is effective.
(2) Regularly disinfect tadpoles and young frogs. Before disinfection, the pathogen should be carefully checked. Generally, frogs are disinfected by soaking or spraying. Commonly used drugs are bleaching powder, copper sulfate, sulfadiazine, potassium permanganate, gentamicin, tetracycline and oxytetracycline. Disinfection time should also be flexibly controlled according to temperature, humidity, water temperature and endurance of tadpoles and young frogs.
(3) The feed used for feeding Rana chensinensis in China should be kept clean, especially the bait tray should be cleaned and disinfected frequently.
3. Correct environment settings
① Shading and rainproof settings
Shading and rain protection should be combined into one, usually consisting of plastic, shading net, asbestos tile and straw shed. Wood frog does not need direct sunlight, and scattered light can fully meet its requirements. In the rainy season, we should prevent the forest frog from getting wet for a long time.
② setting of concealed objects
A certain number of hidden objects should be placed in the pool, mainly all kinds of broad-leaved trees, preferably branched branches, preferably oak trees, and should be placed in the ridge of the field, instead of spreading all around. You can also put some stone piles and tiles regularly.
③ Ambient temperature (mainly on the ground)
Rana chensinensis has different requirements for humidity in different periods. The abnormal young frog has the greatest requirement for humidity, and then gradually decreases. The humidity of metamorphosed young frogs is controlled at 85%-90%, 1-2 months old frogs are controlled at 80%-85%, and frogs over 3 months old are controlled at 70%-80%.
④ Humidification setting of water supply temperature
Humidifying equipment should be timely and convenient, and the whole part should be completely humidified. The main method is to add plastic pipe, atomizing nozzle and water pump.
Overwintering management technology of closed ditch cultivation of China Rana chensinensis: Rana chensinensis in China has the habit of overwintering underwater and overwintering. It lasted for 6 months from the end of September to the middle and late April of the following year. The overwintering management of artificial ditch-sealing frogs is to artificially select and create suitable overwintering sites and water environment to ensure their safe overwintering according to the needs of life characteristics of Rana chensinensis in this period.
First, build a wintering pool.
The wintering pool, also known as the hibernating pool, is a place where forest frogs hibernate intensively. Some natural blisters, deep-water bays and reservoirs with good conditions in frog farms can be used as natural wintering ponds for forest frogs, but most frog farms need artificial wintering ponds.
1. This location is located at or near the place where the forest frogs go downhill in autumn. Choose the river (stream) to avoid the river for 5- 10 meters, and choose flat and sticky land as the place to build the wintering pool.
2. Specifications and quantity of wintering ponds To build wintering ponds, it is required to have a depth of 3-4 meters, a water depth of 2-2.5 meters, a flat bottom and a slope of 70-80 degrees around to prevent them from collapsing after being soaked in water. If the sand at the bottom of the pool is loose, it should be padded with clay to prevent water seepage. The construction area and number of wintering ponds depend on the topographic conditions of frog farms and the number of wintering frogs all the year round. The terrain is flat and open, and a large wintering pond can be built, with a single pond area of 800- 1000 square meters. Small and medium-sized wintering ponds can be built in poor terrain conditions. The area of a single swimming pool is 200-300m2; The number of wintering ponds is determined according to the number of wintering frogs cultivated all the year round. Generally, the overwintering density of adult frogs is 80- 100 /m2, and that of young frogs is 200-300 /m2. A frog farm will build 3-4 small and medium-sized overwintering ponds for 20,000-30,000 cultured frogs and 1.5-0.3 million young frogs to overwinter. When building multiple wintering ponds, the spacing should reach 500- 1000 meters, so as to achieve single irrigation and single row.
Second, the preparation before the use of the wintering pool
A wintering pool that has been recycled for many years. Thick silt at the bottom of the pond affects the water storage capacity, and accumulates a large number of pathogenic bacteria and natural enemies of Rana chensinensis, which should be carefully pruned before the wintering period.
1. Dredging will release the pond water, remove the silt at the bottom of the pond and restore it to the original bottom.
2. After the sludge at the bottom of the pond is removed, it is necessary to control the water inflow and let the bottom of the pond be exposed to the sun for 20-30 days, which can kill some germs and pests.
3. 20-30 days before water injection, sprinkle quicklime on the bottom of the pool and the surrounding pool wall for disinfection. This method can effectively kill pathogenic bacteria and natural enemies such as leeches and parasites of Rana chensinensis.
4. Before blanket irrigation, lay a layer of broad-leaved leaves or grass stems tied with gramineous weeds with a thickness of about 5 cm at the bottom of the pond, and then cover them with gravel and sediment. These mulches are beneficial for wood frogs to hibernate underwater.
5. After water injection 10, China Rana chensinensis was injected to a depth of 2.5m before hibernation, and kept clean.
Third, overwintering management.
In mid-September, when the temperature dropped below 1O℃, China Rana chensinensis began to migrate to the mountain water source. First, it lurks in shallow water. From early June 165438+ to mid-October, the temperature dropped below 5℃, and the Rana chensinensis hibernated in deep water until the end of March to the beginning of April of the following year.
1. Hibernation management of expatriates from mid-September to165438+1early October, 45 to 50 days. The characteristic of this period is that most forest frogs are scattered and lurking in shallow water, in an unstable hibernation state, and can still move on land at night. The key point of management in this period is to divide the captured forest frogs into commercial frogs, cultured frogs and one-year-old young frogs, and send the cultured frogs and young frogs to frog storage tanks for storage respectively. The depth of the frog storage pool is 40-80 cm, and the density of frog storage is 500-800 frogs per square meter of water surface. The frog storage tank can be used as both an incubation tank and a tadpole feeding tank. If the frog farm has enough river water, it can also be temporarily replaced by a wintering pond, that is, the water depth of the wintering pond can be maintained at 50-80 cm. Put the overwintering frogs in, and replenish the overwintering pool water to a depth of 2-2.5m before the forest frogs hibernate in early October of 165438+ 10. A fence with a height of 50-60 cm should be enclosed around the frog storage pool, and the bottom should be tamped manually to prevent the forest frog from escaping. Because the forest frog lurks in shallow water, it is necessary to prevent human theft and predation by various carnivores in management and protection.
2 2. 10/centralized hibernation management from early October to the end of March of the following year 165438+. This period is characterized by the concentration of forest frogs in deep water, crowded together, unable to eat or move, and in a state of deep hibernation. The management points of this period are:
① Send the overwintering frogs in the frog storage pond to the overwintering pond in time. The density of frogs released in the overwintering pond is 80- 100 /m2 and 200-300 /m2, so as to keep the living water overwintering. The northeast is cold in winter, and many farms' rivers and streams will freeze and cut off after winter. The overwintering density of Rana chensinensis in this kind of overwintering pond should be appropriately halved.
(2) During the wintering period, always observe the water flow and keep the water level under the ice not lower than1.5m. ..
(3) After the snowfall, it is necessary to clear the snow on the ice surface or sweep out the snowy road in time to enhance the light transmittance of the pool water.
④ Put mousetraps and rodenticides around the wintering pond at fixed points to prevent the harm of carnivorous natural enemies such as rats.