南京林业大学学报(自然科学版) ›› 2010, Vol. 34 ›› Issue (03): 136-140.doi: 10.3969/j.jssn.1000-2006.2010.03.028

• 研究论文 • 上一篇    下一篇

雪灾对武夷山常绿阔叶林土壤有效氮的影响

丁九敏1,2,徐涵湄1,刘胜1,汪家社3,徐自坤3,阮宏华1*,刘玉石2   

  1. 1.南京林业大学,江苏省林业生态工程重点实验室,江苏 南京 210037;2.连云港职业技术学院,江苏 连云港 222006;3.福建武夷山国家级自然保护区管理局,福建 武夷山 354315
  • 出版日期:2010-06-29 发布日期:2010-06-29
  • 基金资助:
    收稿日期:2009-07-10修回日期:2009-11-19基金项目:国家自然科学基金项目(30670313);国家林业局林业公益性行业科研专项项目(200804006;200704005/wb02)作者简介:丁九敏(1973-),博士生。*阮宏华(通信作者),教授。Email: hruan1690@yahoo.com。引文格式:丁九敏,徐涵湄,刘胜,等. 雪灾对武夷山常绿阔叶林土壤有效氮的影响[J]. 南京林业大学学报:自然科学版,2010,34(3):136-140.

Effects of snow storm on soil available nitrogen in evergreen broad leaf forest in Wuyi Mountain

DING Jiumin1,2, XU Hanmei1, LIU Sheng1, WANG Jiashe3, XU Zikun3, RUAN Honghua1*, LIU Yushi2   

  1. 1.Jiangsu Key Laboratory of Forest and Ecological Engineering, Nanjing Forestry University, Nanjing 210037, China; 2.Lianyungang Technical College, Lianyungang 222006, China; 3.Administrative Bureau of Wuyishan National Nature Reserve, Wuyishan 354315, China
  • Online:2010-06-29 Published:2010-06-29

摘要: 雪灾是一种重要的自然干扰类型,通过改变资源的有效性和异质性而对森林生态系统过程产生显著影响。笔者以福建武夷山的常绿阔叶林为试验地,探讨雪灾干扰后不同土层(0~10 cm、10~25 cm和25~40 cm)常绿阔叶林土壤微生物生物量氮和可溶性氮的变化。结果表明:受灾常绿阔叶林土壤微生物生物量氮、可溶性有机氮、铵态氮含量除25~40 cm土层外都显著高于对照,随土层深度的增加而减少;受灾常绿阔叶林各土层土壤硝态氮含量与对照无显著差异。相关分析显示土壤微生物生物量氮、可溶性有机氮、铵态氮含量均与土壤温度、土壤湿度呈极显著正相关。研究结果表明,由于雪灾导致了土壤温度和湿度的改变,土壤中的氮可能以铵盐和可溶性有机氮的形式从生态系统中流失。

Abstract: Snow storm is a significant natural disturbance. It affects ecosystem processes by altering resource availability and heterogeneity. To understand the effect of snow storm on soil microbial biomass nitrogen and total soluble nitrogen in different soil layers (0—10 cm, 10—25 cm and 25—40 cm), an experiment was conducted in evergreen broad leaf forest in Wuyi Mountain. The results showed that the concentrations of soil microbial biomass nitrogen, soluble organic nitrogen and ammonium in the damaged evergreen broad leaf forest were significantly higher than that in the control forest except the 25—40 cm soil layer, decreased with soil depth. Soil nitrate concentrations are different between the damaged and the control evergreen broad leaf forest in three soil layers. The concentrations of soil microbial biomass nitrogen, soluble organic nitrogen and ammonium were positively correlated with the soil moisture and soil temperature significantly. The results indicated that the soil nitrogen might loss from the forest ecosystem by way of the ammonium and the soluble organic nitrogen , for the changes of soil moisture and soil temperature caused by snow storm.

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