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雪灾对武夷山常绿阔叶林土壤有效氮的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年03期
Page:
136-140
Column:
研究论文
publishdate:
2010-06-29

Article Info:/Info

Title:
Effects of snow storm on soil available nitrogen in evergreen broad leaf forest in Wuyi Mountain
Author(s):
DING Jiumin12 XU Hanmei1 LIU Sheng1 WANG Jiashe3 XU Zikun3 RUAN Honghua1* LIU Yushi2
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
Keywords:
snow storm evergreen broadleaf forest soil microbial biomass nitrogen soil dissolved organic nitrogen ammonium Wuyi Mountain
Classification number :
S714;X43
DOI:
10.3969/j.jssn.1000-2006.2010.03.028
Document Code:
-
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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Last Update: 2010-06-29