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通过对１７个土壤样品的吸附试验和２个土壤样品的淋失试验，研究了山东省主要土壤对铵态氮、硝态氮和酰胺态氮（尿素）的吸持能力。结果表明，供试土壤对铵态氮的吸附符合Ｌａｎｇｍｕｉｒ、Ｆｒｅｕｎｄｌｉｃｈ、Ｔｅｍｋｉｎ方程，最大吸附量为４２９７４～１７５４３９μｇ／ｇ土，其中褐土＞棕壤＞潮土；吸附量主要受粘粒含量的影响；供试土壤对硝态氮基本不吸附。在试验范围内，氮素在土壤中主要以硝态氮流失，酰胺态氮也有一定程度流失，其数量受土壤质地和施肥量的影响，铵态氮几乎无流失现象。
The adsorption capacity of ammonium nitrogen, nitrate nitrogen and amide nitrogen (urea) in the main soils of Shandong Province was studied by adsorption test of 17 soil samples and leaching test of 2 soil samples. The results showed that the adsorption of ammonium nitrogen in the soil tested accorded with the Langmuir, Freundlich and Temkin equations, and the maximum adsorption capacity was 42974 ~ 175439 μg / g. Cinnamon soil> brown soil> Grain content; the test soil nitrate nitrogen basically not adsorbed. Within the experimental range, nitrogen was mainly lost to nitrate nitrogen in soil and amide nitrogen was lost to some extent. The amount of nitrogen was affected by soil texture and fertilization amount, and ammonium nitrogen had almost no loss.