随着马铃薯主粮化步伐的推进,马铃薯在农业生产中的地位越显重要,但在种植过程中,存在农户施肥过量的现象。马铃薯过量施肥不仅导致马铃薯徒长、产量降低、病虫害高发等生产问题,还会带来一系列环境问题,如使地下水硝酸盐超标、水体富营养化等。因此,减少沽源地区马铃薯化肥施用量迫在 With the promotion of potato staple food, the status of potato in agricultural production becomes more and more important. However, in the process of planting, there is an over-fertilization of farmers. Excessive fertilization of potatoes not only leads to legume growth, reduced yield, high incidence of pests and diseases, but also brings about a series of environmental problems such as excessive nitrate in groundwater and eutrophication of water bodies. Therefore, to reduce the Guyuan area potato fertilizer application rate