The invention provides a cultivation method for promoting stable yield of dried sweet potatoes in northern sweet potato area plains to exceed one
ton per mu. The cultivation method comprises the steps of carefully selecting the variety, selecting land to form a
ridge, performing formulated fertilization, selecting strong seedlings, performing film mulching and early planting, appropriately increasing the density, performing
drip irrigation under a
mulch, strictly preventing diseases and pests, chemically controlling the excessive vegetative growth and performing mechanical harvesting. According to the cultivation method, through early planting and close planting and by the matching of other advanced planting technologies, the
growth time of the sweet potatoes is prolonged, the content of
starch in the sweet potatoes and the sweet potato
dry matter accumulation amount in unit area land are remarkably improved, and the per mu yield of the dried sweet potatoes can exceed one
ton. The comprehensive degree of the technology is improved, the fusion of the improved variety and the good method and the combination of an agricultural
machine and the agricultural technology are performed, the matching of
engineering measures and cultivation measures is achieved, the level of the cultivation technology is fully improved, the working efficiency is improved, and the production cost is reduced. The standard degree of the technology is improved, the technology details and parameters are further clearer through the quantitative data indexes, and the basis is laid for the standard forming and popularization of the planting technology.