Soil Available Nitrogen of Picea Crassi f olia Forest in Eastern Qilian Mountains

ZHAO Wei-jun; LIU Xian-de; CHE Zong-xi; JING Wen-mao; ZHANG Xue-long; MA Yu

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Soil Available Nitrogen of Picea Crassi f olia Forest in Eastern Qilian Mountains

- Soil Available Nitrogen of Picea Crassi f olia Forest in Eastern Qilian Mountains
- Bulletin of Soiland Water Conservation Vol. 30, Issue 4, Pages: 99-102(2011)
- 作者机构：
  
  1. 甘肃省森林生态与冻土水文水资源重点实验室,甘肃,张掖,734000
  2. 甘肃省祁连山水源涵养林研究院,甘肃,张掖,734000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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ZHAO Wei-jun, LIU Xian-de, CHE Zong-xi, et al. Soil Available Nitrogen of Picea Crassi f olia Forest in Eastern Qilian Mountains[J]. Bulletin of Soiland Water Conservation, 2011, 30(4): 99-102.
DOI：

ZHAO Wei-jun, LIU Xian-de, CHE Zong-xi, et al. Soil Available Nitrogen of Picea Crassi f olia Forest in Eastern Qilian Mountains[J]. Bulletin of Soiland Water Conservation, 2011, 30(4): 99-102. DOI：

摘要

通过野外取样和实验室分析，对祁连山东段青海云杉林的土壤有效氮状况进行了研究。结果表明：(1)青海云杉林0—40 cm土层土壤总有效氮(铵态氮+硝态氮)的变化范围为17.26~20.76 mg/kg，铵态氮是土壤有效氮的主要存在形态，其含量占到总有效氮的66.72%以上；(2)土壤铵态氮含量随土层深度的增加而较少，硝态氮则无明显的变化规律，而且土壤硝态氮较土壤铵态氮对土壤微环境敏感；(3)土壤铵态氮与有机质相关关系显著(p<0.05)，土壤硝态氮与有机质无显著相关性。研究区铵态氮为土壤有效氮的主要赋存形式，它在很大程度上取决于该区土壤pH中性值，较低温度和较高的水分含量。

Abstract

Soil available nitrogen of Picea crassifolia forest in the eastern Qilian Mountains was studied through field sampling and laboratory analysis.The results showed that:(1)soil total available nitrogen(NH4+—N and NO3-—N)in 0—40 cm of Picea crassifolia forest was 17.26～20.76mg/kg

NH4+—N was the major existing forms of soil available nitrogen with content exceeding 66.72 %;(2)Soil NH4+—N decreased with the increasing soil depth

and nosignificant change of NO3-—N occurred

but NO3-—N was more sensitive to soil microenvironment factor compared with NH4-—N ;(3)The correlation between soil NH4+—N and organic matter was significant(p<0.05)

while the relation between soil NO3-—N and organic matter was not significant.NH4+—N as the main forms of soil available nitrogen largely depended on the soil neutral pH

low temperature and high moisture content in the research area.

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