摘要
以西部地区24种土壤为对象,测定了土壤中的固定态铵、固铵能力、全钾、缓效钾、无效钾、交换钾、交换铵、阳离子交换量、全氮、有机质和pH等,研究了它们与固定态铵之间的关系。结果表明,土壤固定态铵含量平均179mg/kg,占全氮16.6％;土壤固铵能力平均27.8％;土壤固定态铵与固铵能力显著正相关,与土壤全钾、缓效钾、无效钾极显著正相关,与阳离子交换量显著正相关,与土壤全氮、全磷、有机质、pH、交换钾、交换铵相关不显著。
The contents of fixed NH4+, NH4+-fixing power, total nitrogen, total phosphorus, total potassium, CEC, pH, exchangeable NH4+, and exchangeable K+ using 24 soils sampled from West areas in China were determined. Correlation analysis were used to study the relationships between fixed ammonium and effecting factors on it. The results showed that the highist content of fixed ammonium was 360 mg/kg, and the lowest was 18 mg/kg, with a average of 179 mg/kg, accounting for 16. 6 per cent total nitrogen. The highest NH4+-fixing power was 54. 0%, and the lowest 6. 0%, with a average of 27. 8%. The NH4+-fixing power, CEC, total potassium, relaxed K+, and invalid K+ were positive and significant related with fixed ammonium separately, but not related with total nitrogen, total phosphorus, pH, exchangeable NH4+, and exchangeable K+.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第2期54-58,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金重大项目(49890330)
重点项目(30230230)
面上项目(30070429
40201028)
国家重点基础研究专项(G199011707)
