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氮素为植物生長发育过程中最需要的三要素之一,因此測定土壤中氮素的含量从而判断土壤肥力高低和作为施肥的参考,不論在理論上和生产实踐上均有重要的意义。(一)原理:用濃硫酸消煑土壤,使其中有机物质
Nitrogen is one of the three most important elements in the process of plant growth and development. Therefore, to determine the content of nitrogen in soil and judge the soil fertility and as a reference for fertilization is of great significance in both theory and practice. (A) Principle: Eliminate soil with concentrated sulfuric acid to make organic substances