北京林业大学学报2016，Vol.38Issue(4)：44-52,9.DOI:10.13332/j.1000-1522.20150429
水、氮耦合对阔叶红松林叶凋落物分解的影响
Effects of nitrogen addition and water manipulation on leaf litter decomposition
摘要
Abstract
In this study, fivetypes of litter ( Pinus koraiensis, Quercus mongolica, Acer mono, Fraxinus mandsurica and Tilia amurensis) and soil of broadleaf﹣Korean pine mixed forest in Changbai Mountain, northeastern China, were selected to study the effect of nitrogen deposition and water manipulation on the litter decomposition. The results are as follows. The rate of litter decomposition did not change significantly with N addition, but declined when the amount of litter increased. The decomposition rate of Fraxinus mandshurica litter increased with increasing water addition. After 14 weeks of incubation, the N concentration in litter was significantly increased, while the C concentration and C/N ratio of litter were significantly decreased. This phenomenon indicates that both C and N elements in litter may have different migrating patterns. The C and N concentrations of soil increased, the δ15 N value had no significant change, and the δ13 C value and C/N ratio declined after treatment. The δ15 N values of litter residues varied among different water and nitrogen treatments. The δ13 C value of litter residue declined. In addition, there were some interactions among the three factors, i. e. water, nitrogen and litter addition.关键词
氮沉降/降水/凋落物分解Key words
nitrogen deposition/precipitation/litter decomposition分类
农业科技引用本文复制引用
李东升,郑俊强,王秀秀,郑兴波,韩士杰..水、氮耦合对阔叶红松林叶凋落物分解的影响[J].北京林业大学学报,2016,38(4):44-52,9.基金项目
“973”国家重点基础研究发展计划项目(2011CB403202、2014CB954400)、国家自然科学基金项目(41173087、41330530)。 （2011CB403202、2014CB954400）
