本文研究了局部施氮肥对灰化黑钙土上蔬菜作物和马铃薯产量的影响。结果表明,局部施肥对蕃茄、大葱、早熟包菜和马铃薯均有良好效果。文中探讨了为形成单位作物产量被携走和消耗的总氮量和灰分元素量,并且分析了肥料对作物质量的影响。 This paper studied the effects of topdressing nitrogen fertilizers on the yield of vegetable crops and potato on ashes. The results showed that topical fertilization had good effects on tomatoes, green onions, precooked cabbage and potato. In this paper, the amount of total nitrogen and ash that were taken and consumed to produce a unit of crop yield was examined and the effect of fertilizer on crop quality was analyzed.