| 张崇玉,李生秀.西部农业土壤固定态铵及影响因素的研究[J].干旱地区农业研究,2003,(2):54~58 |
| 西部农业土壤固定态铵及影响因素的研究 |
| The studies on fixed NH+4 and effecting factors on it in soils from west China |
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| DOI：10.7606/j.issn.1000-7601.2003.02.13 |
| 中文关键词: 固定态铵 固铵能力 缓效钾 阳离子交换量 相关分析 |
| 英文关键词:fixed ammonium NH+4-fixing power relaxed K CEC correlation analysis |
| 基金项目: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) |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| The contents of fixed NH+4, NH+4-fixing power, total nitrogen, total phosphorus, total potassium, CEC, pH, exchangeable NH+4, 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 NH+4-fixing power was 54. 0%, and the lowest 6. 0%, with a average of 27. 8%. The NH+4-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 NH+4, and exchangeable K+. |
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