53results about How to "Increase the cost of farming" patented technology

The invention relates to a regulation method for utilizing biogas slurry for fish culture. The method includes step 1) a fish pond is prefabricated, a biogas slurry inlet pipe is arranged on one sideof the upper portion of the fish pond, a drain pipe for controlling the water level is disposed on the lower portion of the fish pond, and two multi-functional shallow aerobic aeration devices are mounted in the fish tank; step 2) in selected fishes, filter feeding type chub and bighead carp in the upper layer of the water are primary, combined with herbivorous grass carp in water the middle layerand carp and crucian in the water lower layer; step 3) the biogas slurry is led into the fish pond through the biogas slurry inlet pipe, and the biogas slurry is generated by anaerobic fermentation of fecal sewage generated by the livestock and poultry industry; step 4) the biogas slurry inlet pipe continuously injects the biogas slurry into the fish pond for 24 h every day, the daily inflow andoutflow amount of the biogas slurry in the fish pond is controlled, and the biogas slurry inlet amount is 1.5-2% of the effective water amount. Through the combined effects of physics, biochemistry and biology, the dissolved oxygen content in the water body is increased, and nutritive substances in the biogas slurry are quickly utilized in a variety of ways to be converted into bait capable of being used by fish.