Environmental application evaluation method of freeze-thaw aged biochar

The invention discloses an environmental application evaluation method of freeze-thaw aged biochar, which is used for evaluating the improvement effect of biochar on seasonal frozen soil under long-term aging in a freezing environment, and selects three performance indexes of the capability of intercepting nutrient elements, the water-retaining property and the heavy metal fixing property. The evaluation method disclosed by the invention is comprehensive, simple to operate and accurate in evaluation result, and has reference significance for improving the soil by utilizing the biochar in the freezing environment. 本发明公开了一种冻融老化生物炭的环境应用评价方法，用于评价生物炭长期在冷冻环境的老化下对季节性冰冻土壤的改良效果，选用了截留营养元素的能力、保水性与重金属固定性能三个性能指标。本发明的评价方法全面、操作简单，评价结果准确，对在冷冻环境下利用生物炭改良土壤具有借鉴意义。