Technique of mixed culture of grass carp and field snail

Grass carp and field snail mixed culture, only feed grass, do not need to feed other feed, can ensure the normal growth of grass carp and field snail, make grass carp fat, field snail abundant. Because grass carp eat grass, the feces excreted are high in protein, organic matter, cellulose and vitamins, which is a good feed for field snails. In this way, the water quality will not be polluted, keep clear all the year round, and produce clear water fish and snails, without any toxic and harmful substances, clean, good meat quality, crisp meat, strong meat flavor, is an out-and-out clean breeding method. The techniques of mixed culture of grass carp and field snail are as follows:

First, build ponds. Mixed culture of grass carp and field snails should be kept at a depth of 1 to 1.5 meters, with a long water supply and no pollution, preferably mountains and rivers flowing from the mountains or springs rising from the ground. Do not flow through rice, corn or other fields where molluscicides and herbicides are used, and it is better to build ponds in hillside fields. In late winter and early spring, a good pond should be built. The foundation of the pond is about 1.5 meters high, the bottom of the pond should be flat, and a layer of loose and fertile soil with a depth of about 8 to 10 centimeters should be laid on the surface of the pond, so as to facilitate the snail's movement and foraging in the soil.

Second, water storage. It is most appropriate to raise grass carp and field snails during the "Qingming Festival-Grain Rain" period. One month before stocking, the pond should be filled with water, and the landscape or spring water should be directly introduced into the pond. After storing water, always check the pond foundation and pond water, and repair the leakage in time when it is found to be leaking or decreasing. When the pond water decreases, it should be replenished in time to keep the pond water 1-1.5 meters deep. In the meantime, but also spread a dry and pure plant ash, 30 to 50 kilograms per mu of pond, evenly scattered on the surface of the water, can not only disinfect, but also fertilizer ponds.

Third, release grass carp and field snails. During the "Qingming Festival-Grain Rain" period, grass carp and field snails were released, 500,600 strong and harmless grass carp weighing 30,50g per mu, and 100,150kg of healthy and disease-free field snails weighing about 1520g. The first batch of small snails could be produced in mid-May. Before putting grass carp and field snail into the pond, soak the field snail for 8 minutes with 0.1% soda solution or 0.1% vitamin C solution for 10 minutes and let grass carp swim for 3 minutes for 5 minutes, then carry out disinfection and sterilization, so as to kill various bacteria absorbed in grass carp and field snails, prevent grass carp and field snails from getting sick after stocking, and significantly improve the survival rate.

Fourth, feed the grass. Grass carp can be fed 2-3 days after they are put into the pond, twice a day, once in the morning and once in the evening, each time 150,200kg of fresh grass per mu of pond, evenly placed in the water area of grass carp activities, allowing grass carp to eat freely. With the continuous growth of grass carp, the amount of grass should be increased to about 350 million 400 kg per mu in the second half of the year in order to meet the needs of grass carp growth and development. The grass must be fresh, clean and free from pollution. Grass cut on the same day should be released on the same day, not overnight.