将重铬酸钾-硫酸消煮土壤样品稀释到一定体积,再吸收一定量的土壤稀释液于克氏蒸馏瓶中,通过对蒸馏时间、碱用量、稀释液体积、样品体积等因素进行对比,同时与扩散皿法进行对比,得到了分析结果误差较小的最佳条件,并对盐碱土壤种植后全氮含量进行了测定,达到了令人满意的结果. The potassium dichromate - sulfuric acid digestion and soil samples diluted to a certain volume, and then absorb a certain amount of soil dilution in the Krebs distillation flask, distillation time, base amount, diluent volume, sample volume and other factors were compared, At the same time, compared with the diffusion plate method, the optimal conditions for the analysis of errors were obtained. The total nitrogen content of the saline-alkali soil after planting was measured, and the satisfactory results were obtained.