How many frogs are raised per mu for the growth frog of duck frog and rice stone head?

Depending on your site construction investment and breeding density, it is generally 1 10,000 to10.8 million yuan per mu.

Frog breeding technology mainly includes the following aspects:

First, living habits

Frogs inhabit ponds, ditches and grasslands and rice fields on both sides of rivers, and prey on insects, mainly agricultural pests. They live an amphibious life as adults, usually hiding in grass or rice fields during the day and coming out in the dark and early morning. When the temperature drops below 10℃, frogs hibernate by the water or in the soil, and then come out of the mat in the following spring (early March in the Yangtze River valley), and generally breed in April-July. The female frog can lay 34 eggs at a time, and the fertilized eggs of the frog can hatch tadpoles in 12 days. Tadpoles grow to a certain extent and begin to metamorphose.

The second is the construction of aquaculture ponds.

Frog breeding ponds are divided into spawning ponds, tadpole ponds and adult frog ponds. Generally, it is advisable to choose a damp and warm place to avoid light, and it is advisable to use a long cement pool or soil pool. The field pond is a single pond with a size of 4×6 meters, and the wall of the pond is best leveled with cement, and there is still soil at the bottom of the pond; Courtyard ponds are generally 1× 1.5 m to 2 m, with a depth of 1 m, irrigation holes and drains, and a water depth of 20~50 cm. The swimming pool surface must be equipped with a sun visor. Generally, 40 adult frogs can be raised per square meter. The frog pond can use earth pond, brick pond or paddy field, and the key is to prevent escape. Brick fences or net fences can be built when conditions permit, generally 1~ 1.2 meters high. The water depth of the pond is 30~60 cm, and the mud piles are piled at the center or the sunny side of the water surface for frogs to live on land, accounting for about 1/3 of the total pollution. Plant grass or crops on the mound. Put a small amount of floating aquatic plants in the pool water. As a pond for breeding tadpoles, there is only a small amount of land left for abnormal young frogs to land. The cement pond is better for tadpoles, and the slope of the pond wall should be gentle, which is convenient for tadpoles to inhabit.

Third, feeding management.

(1) Feeding and management of tadpoles

The artificial breeding of edible frogs must be hatched after artificial egg collection, and the hatched tadpoles are cultured in the original incubator or cage, and 600~800 tadpoles are stocked per square meter of water surface. On the fourth day after hatching, tadpoles are artificially fed, and they need to be fed for a week, and then moved into a feeding pond. After about 20~30 days, we will gradually take red worms, Daphnia and maggots as staple foods, or take soybean milk, bean dregs, bean cake powder and Chlorella as staple foods, and feeding a certain amount of fish meal can promote their growth. Generally 15 cooked eggs are broken, and water is added for every 10,000 tails 1~2 times. After the fifth day, mix feed with soybean milk, wheat bran and bean curd residue or rice bran and fish meal, and put the feed on the bait table, 1~2 times a day. Powdered bait is mixed with water and then poured out.

Tadpole management: when bubbles are found in the pool water or the water quality smells rotten, fresh water should be replaced immediately, usually once every three days, and once every two days when the weather is dry for many days and the temperature continues to be high.

Metamorphic period management: frog eggs become young frogs about 70 days after hatching. From the appearance of forelimbs to complete metamorphosis, tadpoles mainly rely on absorbing the supply from the tail, breathing air with their lungs, and begin to jump out of the water and land to inhabit. When more than 90% tadpoles become young frogs, they can be moved into the young frog pond for feeding.

(2) Feeding and management of young frogs

Intensive domestication: the density is 0/00 ~ 0/50 per square meter/kloc-0. Young frogs can be kept in cement ponds with smooth inner walls and the height exceeding 1 m. The water in the pond is about 20 cm deep, and there is a bait table on the water surface. There is no land in the pond, forcing the young frogs to feed and live on the table.

Bait domestication: feed live bait 1 ~ 2 days first, add 20% artificial feed to the bait on the third day, and then increase the proportion day by day. After 10, it will increase to 80% "live bait", which mainly includes earthworm, fly maggot, fish and shrimp, insect, scorpion cow and loach. "Dead bait" refers to dried silkworm chrysalis, animal viscera and compound feed. Activate the "dead bait" by static action, and finally completely consume the artificial bait. At the same time, the timing, quantification and positioning of feeding are required. Feeding time: feed 1~2 times a day around noon in spring and autumn and in the evening or morning in summer, and each feeding should be completed at about 1 hour. The food intake of young frogs weighing less than 50 grams should account for 6 ~ 8% of their body weight; For young frogs whose body weight is above 100g, the feeding amount should be 8~ 10% of their body weight. The bait should be fresh, clean and nutritious.

Screening, grading and separate breeding: after the young frogs are domesticated for 20-30 days, the pond water is drained, and large-scale young frogs are transferred to adult frog ponds for breeding according to the density of 60-80 frogs per square meter; Small frogs are still domesticated in the original pond. It is a new method to breed frogs by intensive breeding, indoor three-dimensional and multi-layer cage culture. Using plastic boxes and wooden boxes to raise frogs, the output of small-scale farming is extremely high, and hundreds of frogs can be raised per square meter. Generally, frogs only need five months from hatching to adulthood.

(3) Feeding and management of adult frogs

After the young frogs are transferred to the frog pond, they eat a lot and grow fast, which is an important period for the formation of commodity output. In addition to providing sufficient bait, it is necessary to increase the feeding of animal feed when tadpoles turn into frogs, mainly live bait with high protein and high reproduction rate, such as fly maggots, earthworms, red worms and ladybugs. In the case of insufficient live bait, it can be mixed with mixed feed, such as rapeseed cake (powder) 60%, rice bran (or wheat bran) 30%, bean powder 5% and fish powder 5%, and the effect is better. Tadpoles move in the water and can provide concentrated feed after 5 days, including soybean milk, egg yolk, Daphnia, water spinach, tomatoes and plankton in the water. In addition, if earthworms are raised on the mound, as long as some lime water with a concentration of 3~5% is sprinkled on the mound every evening, the earthworms will go to their nests and act as bait for frogs. It is also necessary to feed some compound feed in moderation, and feed separately in time to adjust the feeding density. 1 month later, when the adult frog's weight is100g, the breeding density is 30 per square meter, and it is changed to 10~ 15 per square meter two months later. After short-term breeding, it can become a commercial frog.