Low-cost and efficient winter potato water and fertilizer integrated-planting method

The invention provides a low-cost and efficient winter potato water and fertilizer integrated-planting method. Drop irrigation type topdressing management is performed while water is supplemented by utilizing drop irrigation, efficient water-saving irrigation and fertilization are integrally performed while the water supply problem of potato production in a water resources shortage region can be solved, and a water and fertilizer integrated prioritization scheme is achieved through accurate water and fertilizer control. According to the law that the demands for water and fertilizers of potatoes are closely related to their root systems and ground partial growth conditions, topdressing is performed, different fertilizer varieties are reasonably planned and managed, the fertilizers are applied as required to maintain the best fertilizer concentration in a root zone, the pertinence is stronger, absorption is better, accordingly the scientific fertilization method is low in cost and conforms to a crop demand law,