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通过全省德州试点和部分地区土壤普查试点,发现当前土壤普查中部分养分化验项目中,在方法步骤上值得商榷.因此,在全省普查化验中进行了必要的观察试验,现将初步试验结果综述如下:一、土壤全氮测定方法比较比较老凯氏法(硫酸—硫酸钾、硫酸铜混合催化剂)与高氯酸—硫酸消化法测定土壤全氮结果的相关性,摸索高氯酸法测定全氮的规律.供试土样为德州市820号土样和全省标准土样.
Through the pilot of the province of Texas and some parts of the soil census pilot found that the current soil census part of the nutrient testing project, the methodological steps are questionable.Therefore, the survey conducted in the province of the necessary observation test, the preliminary test results The results are summarized as follows: 1. Comparison of Soil Total Nitrogen Determination Methods Compared with the old Kjeldahl method (sulfuric acid-potassium sulfate, copper sulfate mixed catalyst) and the perchloric acid-sulfuric acid digestion method to determine the correlation of soil total nitrogen, Total nitrogen for the soil samples for the test sample No. 820, Texas and the province’s soil samples.