The electric hotbed is easy to control the temperature, and the nursery effect is best, but the cost is slightly higher. The bed is built where the leewards are sunny, the terrain is flat, and the power source is close enough to connect the heating line and the temperature controller. The seedbed is generally 5 meters long, 1.5 meters wide, 20 cm deep, 45 cm high on the northern wall, and 20 cm tall on the south wall to facilitate daylighting and 25 cm wide walls. Generally do a good job after the seedbed leveling solid ground, began laying geothermal lines. Use two wooden nails on both ends of the board to fix the heating wires with an average distance of 5 centimeters and close both sides. The wiring requirements are straight and tight. Even the power supply connector insulation tape is tightly wrapped with waterproof tape to prevent leakage. After fertilizing the hotline, fertile bed soil of about 10 cm in earth cover was mixed with 50 g of diammonium phosphate per square meter. After the wiring, it can be energized and heated for 2 days. Then the seeds are drained. After arranging the seed potatoes, sprinkle fine water and apply bactericide. After the water seepage, cover the surface with 2-3 cm of fine sand. Plug in the temperature probe of the ground temperature meter and the temperature controller to cover the agricultural film and straw curtain.
Electric hotbed nursery can be used to control the temperature in different stages of nursery. It can automatically cut off the power when reaching the preset temperature, keep proper seedling temperature, convenient temperature control, and can achieve high temperature seedling, medium temperature seedling and low temperature seedling. But pay attention to electricity safety, cut off the power supply when the seedbed management. The electric heating wire can not be cut off and used arbitrarily, so as not to increase the electric current to burn the insulation layer. The temperature displayed by the temperature controller may not be the same as that displayed by the ground temperature meter. It is necessary to observe and adjust the control temperature with the ground temperature meter at any time. The hotline skin is damaged and repaired to prevent leakage. After the nursery is over, it is necessary to take out the electric heating line in time and clean it well to prepare it for reuse.
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