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[1]李紫燕,李世清.黄土高原典型土壤有机氮矿化过程中非交换性铵态氮的变化[J].水土保持研究,2007,14(02):306-310,314.
　LI Zi-yan,LI Shi-qing.Change of Non-exchangeable Ammonium Nitrogen in the Process of Organic Nitrogen Mineralization of Typical Soils on Loess Plateau[J].Research of Soil and Water Conservation,2007,14(02):306-310,314.

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黄土高原典型土壤有机氮矿化过程中非交换性铵态氮的变化

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 14 期数: 2007年02期页码: 306-310,314 栏目: 出版日期: 1900-01-01

Title:: Change of Non-exchangeable Ammonium Nitrogen in the Process of Organic Nitrogen Mineralization of Typical Soils on Loess Plateau

作者:: 李紫燕^1,2, 李世清^1,2; 1. 西北农林科技大学资源与环境学院, 陕西, 杨凌, 712100;
2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西, 杨凌, 712100

Author(s):: LI Zi-yan^1,2, LI Shi-qing^1,2; 1. College of Resources and Environment Sciences, Northwest Sci-tech University of Agriculture and Forestry, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China

关键词:: 农田风蚀; 起沙起尘; 防治措施; 北京郊区

Keywords:: Non-exchangeable ammonium nitrogen; soil type; vegetation type; organic material

分类号:: S153.61

摘要:: 以黄土高原从北向南不同地区典型土壤类为对象，采用Bremner淹水培养法，研究黄土高原不同生境条件下土壤有机氮矿化过程中非交换性铵态氮的变化。结果表明：土壤非交换性NH₄⁺-N随Bremner法淹水培养时间延长，含量增加。不同土壤类型在培养20 d时非交换性NH₄⁺-N的增加量存在显著差异（p=0.0229），而培养40 d和60 d时差异不显著（p分别为0.1379和0.1159）。培养期间非交换性NH₄⁺-N的增加量均表现为以土垫旱耕人为土最大，其次是黄土正常新成土，简育干润均腐土和干湿砂质新成土较小；添加有机物料极显著影响培养期间的非交换性NH₄⁺-N增加量（培养20 d、40 d和60 d时p分别为0.0002，0.004和0.0003），表现为紫花苜蓿和长芒草土壤非交换性NH₄⁺-N的增加量均极显著高于不添加有机物料的对照土壤；在培养20 d、40 d和60 d时，加(NH₄)₂SO₄土样非交换性NH₄⁺-N的增加量显著大于不加(NH₄)₂SO₄土样（p分别为0.0037，0.0033和0.0027），这是土壤对(NH₄)₂SO₄中NH₄⁺-N固定的必然结果；不同植被类型土壤培养20 d时的非交换性NH₄⁺-N增加量差异显著（p=0.0434），培养40 d和60 d时差异不显著（p分别为0.7378和0.5375）；长期秸秆和氮肥配施土壤非交换性NH₄⁺-N增加量大于不施肥对照土壤，但差异不显著土壤黏粒、全氮和有机质与培养0 d、20 d、40 d和60 d时土壤的非交换性NH₄⁺-N含量均呈极显著正相关；而非交换性NH₄⁺-N的增加量与粘粒无相关性，但与全氮和有机质呈显著正相关。

Abstract:: In order to investigate the content change of non-exchangeable ammonium nitrogen during the process of soil organic nitrogen mineralization, the typical soils collected from north to south on Loess Plateau were chosen as the material, and the Bremner incubation method was conducted and the soils were incubated for 60 d. The results showed that the contents of non-exchangeable NH₄⁺-N increased with increasing the incubation time. The amount increased for non-exchangeable NH₄⁺-N existed significant difference (P=0.0229) among the different soil types after the 20d of incubation, however, it was not significantly different when incubation at 40 d (P=0.1379) and 60 d (P=0.1159). The increased amount of non-exchangeable NH₄⁺-N during the incubation indicated as the following tendency, namely, Eum-Orthic Anthrosols>Los-Orthic Entisols>Hap-Ustic Isohumisols>Ust-Sandiic Entisols. Organic material influenced significantly the increased amount of non-exchangeable NH₄⁺-N (P was 0.0002, 0.0004 and 0.0003 when incubated at 20 d, 50 d and 60 d, respectively). NH₄⁺-N increased remarkably when Stipa bungeana and Medicago sativa were added compared with no addition. The contents of non-exchangeable NH₄⁺-N increased significantly when added (NH₄)₂SO₄ compared without addition at 20 d, 40 d and 60d of incubation and P was 0.0037, 0.0033 and 0.0027, respectively. It was the result that the NH₄⁺-N from (NH₄)₂SO₄ was fixed within the soil. The increased amount of non-exchangeable NH₄⁺-N increased significantly for different soils, on which different vegetation types grew before the collection of soil samples, when incubated at 20 d (P=0.0434), but not significantly at 40 d and 60d (P=0.7378 and 0.5375). The increased amount of non-exchangeable NH₄⁺-N in the soil, on which crop straw and nitrogen fertilizer had been incorporated for a long-term period, was larger than that of no addition, but it was not significantly different among these two fertilization models. Soil clay, total N and organic matter were positively correlated remarkably with the contents of non-exchangeable NH₄⁺-N, the increased amount of non-exchangeable NH₄⁺-N had no correlation with soil clay, whereas it had significantly positive correlation with total N and organic matter.

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备注/Memo

收稿日期:2006-7-5
基金项目:国家自然科学基金（90502006，30571116）
作者简介:李紫燕（1977- ），女，在职博士，从事土壤-植物氮素营养研究。
通讯作者:李世清，男，博导，从事土壤-植物氮素营养研究。

更新日期/Last Update: 1900-01-01