树木NO排放速率的测定

被引:7
作者
张秀君
徐慧
陈冠雄
机构
[1] 中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室
关键词
树木; N2O排放速率; 土壤含水量;
D O I
暂无
中图分类号
Q945 [植物生理学];
学科分类号
0903 ;
摘要
采用封闭罩法 ,对长白山阔叶红松林的几个主要树种———水曲柳 (Fraxinusmandshurica)、红松 (Pinusko raiensis)、毛赤杨 (Alnushirsuta)和椴树 (Tiliaamurensis)的连体枝叶排放N2 O的速率进行了原位测定 ,并考察了树木的N2 O排放速率与土壤含水量的关系。结果表明 :在观测期间 ,4种树木的N2 O排放速率的变化范围分别为 :水曲柳 9.46~ 15 2 .85ngN2 O·g-1DW·h-1、红松 1.37~ 6 4.5 1ngN2 O·g-1DW·h-1、赤杨 - 12 .0~ 16 .1ngN2 O·g-1DW·h-1、椴树 - 11.2~ 16 .1ngN2 O·g-1DW·h-1。它们的平均N2 O排放速率分别为 39.5 1、2 3.2 1、2 5 .6 9、0 .0 3ngN2 O·g-1DW·h-1。树木的N2 O排放速率与土壤含水量呈显著正相关关系
引用
收藏
页码:538 / 542
页数:5
相关论文
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