What are the main facilities needed for watermelon seedling raising?

(Agricultural Wealth Network) The watermelon seedling raising period falls at the end of winter and the beginning of spring, when the outside temperature is still very low. Therefore, the key to ensuring successful seedling raising is how to raise the seedbed temperature (heating) and maintain the seedbed night temperature (insulation). There are generally 3 common methods for raising the seedbed temperature: first, light heating, that is, seedling raising in a sun-facing bed; second, seedling raising on a heated kang; third, heating with electric heating wires. Facilities for insulating the seedbed include agricultural film, straw mat covers, and setting up windbreaks.