The benefits of polyculture:
(1) Make full use of water bodies. Mixed fish rearing is more effective than that of a single fish or a single turtle.
(2) Earthworms have oxygen increasing effects on the water body. He breathed lungs. Must often float to the surface to breathe. Its back-and-forth movement from the bottom to the surface of the water enhances the vertical circulation of the upper and lower water layers, allowing the surface layer of supersaturated dissolved oxygen to diffuse to the bottom layer, making up for the lack of dissolved oxygen in the water. At the same time, the bottom layer of exhaust gas is also brought to the surface of the water by crawling or moving up and down in the bottom layer, reducing the harm of toxic gases.
(3) Purify water quality.é³– Underwater activities can accelerate the decomposition of organic matter in silt at the bottom of the pond and make the water quality fat, which not only reduces the oxygen consumption of organic matter, but also mitigates changes in water quality, and is also conducive to the growth of filter-feeding fish.
(4) Improved feed utilization. In the breeding process of alfalfa, some organic wastes, such as residual feed and feces, sink into the bottom of the pool and contaminate the water. After polyculture, fish can not only directly feed on the residual feed and feces, but these organic substances can also fertilize water quality, multiply plankton and benthic organisms, and indirectly provide live feed for fish and alfalfa.
(5) Reduce the occurrence of fish diseases. After polyculture, some sick fish and dead fish become a good meal. In this way, the spread and spread of pathogens are prevented and the root cause of fish diseases is eliminated.
In the United States and Canada, an Electric Blanket is a blanket with an integrated electrical heating device usually placed above the top bed sheet. In the United Kingdom and Commonwealth, electric blanket commonly refers to an electric underblanket (electric mattress pad), which is placed below the bottom bed sheet. Electric blankets usually have a control unit which adjusts the amount of heat the blanket produces. Blankets for larger sized beds often have separate controls for each side of the bed. The electric blanket may be used to pre-heat the bed before use or to keep the occupant warm while in bed.
Some modern "low voltage" electric blankets (such as Car Blanket) have thin carbon fiber wires and work on 12 to 24 volts. These blankets are more comfortable and even safer than ordinary 110/240 volt blankets.
Electric Blanket
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