The technology of using biogas slurry to cultivate Loach

First, select the site to build the pool

Choose the front and back of the house where the water source is guaranteed and the drainage and irrigation is convenient, and build the pool near the outlet of the biogas digester. The size of the pool can be adjusted to local conditions, the general area is 10-20 square meters, the pool depth is 1.2 meters, the pool wall is made of lime or brick knife, and coated with cement. And set up a special inlet and outlet, which is equipped with barbed wire to prevent it from escaping. Shade sheds should be built above the ground and insect trap lights should be set up.

2. Disinfection and stocking of Loach seedlings in clear Pond

0.22 kg quicklime meter is used for each cubic meter of pool water, and the quicklime slurry is evenly sprinkled and disinfected while it is hot in the whole pool. The PH value of the test pool water is below 7, or the activity of water fleas is observed, or dozens of Loach are put into the bundled box installed in the pool water to try to raise them. If Loach is in the box for one day and life is normal, Loach seedlings can be released. Artificial breeding or wild Loach seedlings can be used to raise, Loach seedlings should be injury-free, disease-free, healthy and lively. Soak in 3% Mel 4% salt solution for 8 minutes before stocking, and breed 80-100 Loach species of 3-4 cm per square meter. The stocking specifications should not be too different, so as to avoid the phenomenon of eating too much and eating small.

Third, reasonable bait and timely change of water

Misgurnus anguillicaudatus is an omnivorous fish. in the process of feeding, in addition to applying biogas residue and biogas liquid to cultivate natural plankton bait, Loach can also be fed with appropriate amount of snails, earthworms, bean curd dregs, rice bran, wine dregs and stems and leaves of tender plants. The proportion of daily feed intake to the total body weight of Loach is 1% in March, 4% in April-June, 10% in July-August, and 4% in September-October. Four rules should be adhered to: setting up the bait table in the pool and putting the bait on the bait table; regularly, feeding once every morning and evening; positioning, the pool should be fresh, no rot and mildew; quantitative, it is appropriate to eat 2-3 hours after feeding. Biogas dregs and biogas slurry are put into the ponds in turn, 250 grams per square meter each time, 500 grams per square meter every time, once a week. During the feeding cycle, the insects were used as supplementary bait for Loach by electrifying the trapping lamp at night. The changes of pool water quality should be observed frequently, and the general water quality should be yellowish green. If Misgurnus anguillicaudatus is found to be out of the water, it means that the pool water is too fat and there is no oxygen in the water. New water should be injected in time and old water should be released. Especially in muggy or thunderstorm weather, pay more attention to frequent injection of new water and timely increase of oxygen. Conditional aerator can also be installed to increase oxygen to prevent the death of Loach.

IV. Prevention and prevention of enemy harm

The common diseases are skin mold and rotten fin disease. The sick Loach can be bathed in 10-15 μ g / ml antibiotic solution for 10 minutes, or sprinkled in the whole pool with 1 × 10-6 concentration bleach (containing 25-30% available chlorine). The common parasites are rotifer, tongue cup worm and so on. These parasites will cause death on the loach seedlings, and the diseased fish will show symptoms such as increased mucus on the body surface, swimming alone, floating on the surface, loss of appetite and so on. At this time, the diseased fish should be examined for surface mucus in time. About 50 rotifers or tongue cup worms were observed under low power microscope, which could be sprinkled with 0.7 × 10 ~ (- 6) copper sulfate in the whole pool. For rodents and snakes, we should often patrol the pool to prevent.