摘要
【目的】研究亚热带毛竹扩张常绿阔叶林和针叶林对土壤铵态氮、硝态氮及总无机氮的影响。【方法】分别选择毛竹向常绿阔叶林和针叶林扩张的典型样带,通过挖掘剖面法取0~10 cm、10~20 cm及20~40 cm土层土壤样品,分析扩张样带上不同林型土壤铵态氮、硝态氮及总无机氮含量的差异。【结果】毛竹向常绿阔叶林扩张改变土壤铵态氮垂直分布格局、降低硝态氮和总无机氮含量;毛竹向针叶林扩张增加表层土壤铵态氮含量、降低硝态氮和总无机氮含量。【结论】毛竹扩张常绿阔叶林通过降低中层土壤铵态氮和表层土壤硝态氮含量,从而降低总无机氮含量;毛竹扩张针叶林通过增加表层土壤铵态氮和降低中、深层硝态氮含量,进而降低总无机氮含量。
[Objective]This paper aims to study the effects of moso bamboo expansion to subtropical evergreen broad-leaved and coniferous forests on soil ammonium nitrogen,nitrate nitrogen and total inorganic nitrogen contents.[Methods]The typical transects of moso bamboo expanding to evergreen broad-leaved forest and coniferous forests were selected,respectively.The soil samples of 0-10 cm,10-20 cm and 20-40 cm were taken by excavation section method to analyze the differences of soil ammonia nitrogen,nitrate nitrogen and total inorganic nitrogen contents among different forest types in the expanding transects.[Results]Moso bamboo expansion to evergreen broad-leaved forest changed the vertical distribution pattern of ammonia nitrogen,and reduced the content of nitrate nitrogen and total inorganic nitrogen;Moso bamboo expansion to coniferous forest also increased the content of ammonia nitrogen in surface soil,and decreased the content of nitrate nitrogen and total inorganic nitrogen.[Conclusion]The expansion of moso bamboo to evergreen broad-leaved forest reduced the content of total inorganic nitrogen by reducing the content of ammonia nitrogen in middle soil and nitrate nitrogen in surface soil;moso bamboo expansion to coniferous forest also reduced the content of total inorganic nitrogen by increasing ammonia nitrogen in surface soil and reducing the content of nitrate nitrogen in middle and deep layers.
作者
陈慧娴
肖意
徐健鸿
万松泽
CHEN Huixian;XIAO Yi;XU Jianhong;WAN Songze(College of Forestry,Jiangxi Agricultural University,Nanchang 330045,China)
出处
《生物灾害科学》
2022年第2期210-215,共6页
Biological Disaster Science
基金
国家自然科学基金项目(41867007)
中央财政林业科技推广示范项目(JXTG[2021]14)。
关键词
毛竹扩张
常绿阔叶林
针叶林
铵态氮
硝态氮
moso bamboo expansion
evergreen broad-leaved forest
coniferous forest
soil ammonia nitrogen
soil nitrate nitrogen
