北京林业大学学报2017，Vol.39Issue(8)：42-49,8.DOI:10.13332/j.1000--1522.20160193
氮添加对典型阔叶红松林净初级生产力的影响
Impacts of nitrogen addition on net primary productivity in the typical mixed broadleaved-Korean pine forest
摘要
Abstract
The impact of nitrogen ( N) on net primary productivity ( NPP) of forest ecosystem has become focus of the researchers since N deposition is increasingly serious. A six-year field experiment was conducted in the typical mixed broadleaf-Korean pine forest in Xiaoxing' an Mountains, northeastern China, to explore the effects of N addition on carbon ( C) density and NPP of forest ecosystem and its components. Urea was selected as N source and four levels of N addition were control (N0, 0 kg/(ha·a), low N (N1, 30 kg/(ha·a), medium N (N2, 60 kg/(ha·a) and high N (N3, 120 kg/(ha·a). Results showed that N addition had no significant effects on C density of vegetation C pool, detritus C pool and soil organic C pool (P>0. 05). N addition had no significant effects on the NPP of whole forest ecosystem, however, it inhibited NPP of coniferous tree leaf but promoted that of broadleaved trees ( P <0. 05 ) . Soil total N concentration had no significant difference among different N addition treatments, but it had a highly significantly positive correlation with soil organic C concentration ( P<0. 01 ) . We suggest that soil total N concentration has a significant influence on soil organic C in forest ecosystem, rather than N addition amount.关键词
氮/碳密度/净初级生产力/典型阔叶红松林/土壤全氮含量/土壤有机碳浓度Key words
nitrogen/carbon density/net primary productivity ( NPP )/typical mixed broadleaved-Korean pine forest/soil total nitrogen concentration/soil organic carbon concentration分类
农业科技引用本文复制引用
毛宏蕊,金光泽..氮添加对典型阔叶红松林净初级生产力的影响[J].北京林业大学学报,2017,39(8):42-49,8.基金项目
中央高校基本科研业务费专项 (2572017EA02)、国家重大科学研究计划项目(2014CB953803). （2572017EA02）
