New technology of green culture of crocodile tortoise

Crocodile turtles are the best of many turtle species in the world and are famous for their highest meat yield (85%-89%). Its meat is delicate and crisp, and its nutritional value far exceeds that of pig, beef and mutton. Its whole body is treasure, meat, liver, gallbladder, blood, bone have a variety of medicinal health care effects, flexible and smooth skin can make luxury leather handbags, handbags and so on. Therefore, the active development of crocodile turtle culture will have a bright future. At present, the price per kilogram of crocodile turtles is up to 800 to 1000 yuan, and there is no goods available. In order to adapt to the consumption trend that people favor green food, the new technology of green breeding of crocodile turtles is introduced as follows:

First, the turtle pond is built in a place where water is convenient, pollution-free, transportation is convenient but quiet. Its shape is suitable for cement plastering pool with rectangular arc angle in east-west direction or soil pool with the same shape but with external anti-escape wall, each pool area is tens of square meters ~ hundreds of square meters, pool depth is 1.2 ~ 1.5 meters, water depth is 30 ~ 80 cm; the bottom of the pool has a slope of 10 °~ 16 °from north to south, and the lowest part is provided with a drainage outlet with an anti-escape net cover; the pool corners are smooth and arc-shaped, and they are covered with anti-escape pressure plates. An anti-escape wall is built on the periphery of the turtle pond, which is 1 meter high, leaving a door on one side of the wall, and the top of the wall can also be added to the eaves of the pool ("T" shaped anti-escape wall). The top of the outer anti-escape wall should be provided with a Jack with a diameter of 2 cm ~ 3 cm every 0.6 meters or so. Several overflow holes are left on the highest water level of the outdoor cement pool wall. The newly built cement pool has alkaline substances, and the wall and bottom of the pool can be scrubbed with 10% glacial acetic acid, soaked for 1 to 2 days after filling with water, and then washed with clean water and filled with new water. Before raising turtles, it is also necessary to use 15 × 10-6 20 × 10-6 bleaching or 1 × 10-6 "strong chlorine" to sprinkle disinfection and sterilization on the whole pond, and the turtle species can be released 2 days later.

In order to prevent heat and cool down, increase shelter and purify water quality, plants such as water peanuts and water hyacinth should be planted in the pond, the area of which is no more than 1 inch of the total area of the pool; scaffolding can also be built and climbing vines can be used to shade the sun to form an artificial bionic green environment.

In addition to the above general conditions, the artificial creation of the best growth temperature of a crocodile tortoise is an important measure to strengthen turtle breeding. At low temperature, the water (gas) of the smokeless boiler is warmed, the turtle pond water is kept about 30 ℃ and the air temperature is about 31 ℃, and the constant temperature intensive feeding can also be realized by using temperature self-control instrument and electric heating device.

Second, the adoption of high-density green culture in turtle breeding is a new technology with high efficiency, and it is also the inevitable trend of the development of turtle breeding industry. The initial stocking density (about 200 g / m ~ 2) is 24 / m ~ 27 / m ~ 2, which should be about 5 kg / m ~ 2 by weight, but with the rapid growth of crocodile turtles, attention should be paid to reducing the density in time. When the average specification reaches 350 g / m ~ 400 g / m, it should be reduced to 20 / m ~ 22 / m; when the average specification reaches 500 g / m, it can be kept at 15 / m ~ 17 / m; at 600 g / m, it should be kept at 12 / m2 ~ 14 / m2; 700 g / h should be 10 / m2 ~ 12 / m2; 800 g / h should be 8 / m2 ~ 9 / m2.

Third, the feed is recommended to use SDG crocodile turtle special green formula feed (protein content more than 48%). During the preparation, the ingredients are weighed on the spot, and the photosynthetic bacteria with a total weight of 5% to 10% and about 45% of the water are added to make long particles with a particle size of 2 mm ~ 3 mm. If there are conditions, make floating expanded pellet feed, the effect is better.

The amount of compound feed is 1.5%-2.5% of the total body weight of crocodile turtles and 5%-10% of fresh feed. They were fed three times a day at 6 ~ 7 o'clock, 12:00 ~ 13:00 and 17:00 ~ 18:00 respectively. Feed should be more and uniform, and try to make a sound when the feed enters the water. Do not concentrate on one place, resulting in heaps of feed. The number of feed tables in each pool should be determined according to the size of the pool, generally 3 ~ 4 per square meter.

4. Water quality regulation in view of the fact that under the condition of high-density intensive turtle culture, the turtle has more food intake and excreta, and the water temperature is higher, even if the feed is green feed, the pollution rate of water quality is faster, and it is easy to produce more harmful substances in the water, especially ammoniated nitrite and H2S, but through sprinkling and bottom application of photosynthetic bacteria, the water quality can be effectively improved and harmful substances can be reduced. When adding new pool water, 10 × 10-6 15 × 10-6 photosynthetic bacteria are applied at the same time; changing water is also an effective way to control water quality, the water depth of about 20 cm can be changed once a day, and the water depth of 30 cm can be changed every 2 days. Do not change the water for many days, do not make the water stink. Quicklime can be sprinkled every 7 ~ 10 days with a concentration of 70 × 10 ~ 6, and should not be used at the same time.