China Rana chensinensis is widely distributed in the northern provinces of China, mainly in the three northeastern provinces, Qingyuan, Xinbin, Hengren and Xifeng in Liaoning, Huadian, Lan Shu, Jiaohe, Fusong, Antu, Panshi, Changbai and Dunhua in Jilin, and Wuchang, Shangzhi and Ning 'an in Heilongjiang. In addition to the three northeastern provinces, there are forest frogs in Beijing, Tianjin, Hebei, Henan, Shanxi, Shaanxi, Inner Mongolia, Gansu, Qinghai, Tibet, Sichuan, Hubei and Jiangsu.
China Rana chensinensis is a precious frog species for both food and medicine. Eating is considered a delicious food; Medicine is regarded as a treasure. The dried oviduct of its female frog is called "Oviductus Ranae", which is a precious medicinal material. The price of frog oil in the local market is about 4000 yuan per kilogram. Due to the large-scale freezing damage in the three northeastern provinces in 200 1 winter, there are very few commercial frogs this year, which also makes the price of forest frogs soar. Last year, the commercial live frog per kilogram 1 10 yuan will reach the 240 yuan per kilogram this year. It can be seen that the natural resources of Rana chensinensis in China are increasingly exhausted, and the number of Rana chensinensis in China is also sharply reduced due to indiscriminate hunting. As a result, China Rana chensinensis and its products sell well in domestic and foreign markets, which are expensive and in short supply. While protecting resources, it is imperative to develop artificial breeding of Rana chensinensis in China. At the same time, the southward migration of China Rana chensinensis has attracted people's attention.
Full artificial rearing of Rana chensinensis in China refers to artificial rearing of sufficient feed (Tenebrio molitor) to simulate the natural environment in the wild, and feeding Rana chensinensis in China with Tenebrio molitor as the main feed. The surrounding fences should be protected from natural enemies such as rats and snakes. Artificially create good wintering conditions. Prevent the occurrence of diseases. Complete the artificial incubation of tadpoles. Female mutation technology. According to the principle of ecology, using the space-time difference and the principle of mutual benefit between organisms, the environmental conditions of ecological intensive artificial breeding are created, and the comprehensive technical measures such as feeding, feeding, escape, natural enemies, diseases, overwintering and rapid frog breeding are solved.
The artificial breeding of Rana chensinensis in China has many advantages, because it is intensive and high-density artificial intensive breeding, which requires small area of frog farm and is easy to choose. Practice has proved that a circle of 1.200 square meters can catch 6000 biennial commercial frogs, with considerable benefits. Because Tenebrio molitor occupies a small area and is easy to manage, it can be properly fed to ensure the predation of Rana chensinensis and accelerate its growth. (The artificially raised frogs had eggs and oil respectively), and commercial frogs can be sold two years later. The output of frog oil in two years is much higher than that in semi-artificial farming for two years. After identification, the quality of frog oil is good.
Because it is kept in captivity under simulated wild natural conditions, the environmental conditions are superior and the vegetation is good, which is suitable for the growth of Rana chensinensis in China and ensures that Rana chensinensis in China will not be lost. Due to the dry weather this spring, it was the time when frogs landed, and a large number of wild semi-artificial frogs died, some of which could reach more than 70%. There are many diseases of Rana chensinensis in China. Our artificial captivity is conducive to disease control, preventing the occurrence of diseases of Rana chensinensis in China and improving the recapture rate of Rana chensinensis in China. There is no way to prevent diseases in the wild.
There are many natural enemies in the forest frog, and there are two artificial fences, plus electric cats to prevent rats and snakes and prevent man-made damage. Create a foolproof living environment for the forest frog, so that the forest frog has a high return rate. This is also incomparable to the semi-artificial breeding of Rana chensinensis.
The economic benefit of artificial captivity of Rana chensinensis in China is considerable: at the end of the first autumn harvest, a family farmer prepares 25 kilograms of Tenebrio molitor and makes 200 insect trays, which can be propagated indoors in 8- 10 square meters. According to different seasons, the cost of raising insects is also different. Besides wheat bran, vegetables such as cabbage, radish and potato should be prepared to feed the insects. In the spring of the following year, 200 groups of frog eggs were prepared, and a 1000 square meter frog circle was built, with plastic sheets, big bricks and other fences. It is enough to ensure that the forest frog does not escape, natural enemies do not harm, and the vegetation conditions are good. After careful management, 80,000 to 65,438+10,000 frogs can be collected after autumn. If it is sold, there will be an average of 40,000 yuan in 0.5 yuan, and the profit from selling commercial frogs in the second year of wintering will be 654,380+0.2 million yuan.
According to the calculation of the above-mentioned small frog farm, the frog eggs in 600 yuan, Tenebrio molitor in 500 yuan, wooden pallet in 600 yuan and wheat bran are about 1.500 yuan, the construction cost is 1.500 yuan, and the working hours and miscellaneous expenses are calculated at 1.600 yuan, totaling about 6,300 yuan. Little frogs could sell for 40,000 yuan in those days. We can get an income of 33700 yuan. If carefully managed, the above indicators can be achieved. In the second year, if the investment is increased by 40,000 yuan, 30,000 to 40,000 commercial frogs can be sold, and the profit can be 9-120,000 yuan.
Necessary conditions for artificial breeding of Rana chensinensis;
1. Tenebrio molitor has sufficient feed (Tenebrio molitor is easy to breed). Because forest frogs are kept in captivity, it is necessary to ensure that each frog eats 3 to 5 bugs every day.
2. The location of frogs is very important. It is necessary to choose a place with vegetation, water source, good wintering conditions and moist soil.
The surrounding fence has been built. Because of the strong escape function of the wood frog, the wood frog can't escape (it is more appropriate to block it with plastic edges). At the same time, pay attention to prevent the harm of natural enemies such as rats and snakes. Once the frog farm enters mice and snakes, the consequences are unimaginable.
4. Due to the artificial high-density breeding of frogs, the environmental conditions are not suitable, and the forest frogs have diseases, so it is necessary to prevent them as soon as possible. If we are sick, it will be too late to treat them.
5. Rana chensinensis will not become a commodity until two years later, so the wintering of Rana chensinensis is particularly important, and it is also the key to the success or failure of artificially raising Rana chensinensis. We should try our best to find a natural living environment. Ensure the success of artificial breeding of frogs.