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土壤中的铵态氮与氧化镁共同蒸馏,馏出液用硼酸溶液吸收,以标准酸滴定,计算其含量。一、材料与方法1.材料与仪器取风干土样备用。主要仪器为:KJELTEC2300全自动定氮仪;BS2202S0.01克型电子天平。
The ammonium nitrogen in the soil is co-distilled with magnesium oxide, and the distillate is absorbed with a boric acid solution to titrate with standard acid to calculate its content. First, materials and methods 1. Materials and instruments Take the soil dry soil samples. The main equipment: KJELTEC2300 automatic nitrogen meter; BS2202S0.01 grams of electronic balance.