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当前位置: 首页 > 文章 > 氮添加对典型阔叶红松林净初级生产力的影响 北京林业大学学报 2017 (8) 42-49
Position: Home > Articles > Impacts of nitrogen addition on net primary productivity in the typical mixed broadleaved-Korean pine forest Journal of Beijing Forestry University 2017 (8) 42-49

氮添加对典型阔叶红松林净初级生产力的影响

作  者：
毛宏蕊;金光泽
单  位：
东北林业大学生态研究中心
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
摘  要：
大气氮(N)浓度日益升高,N沉降对森林生态系统生产力的影响成为当前研究的热点。本研究在典型阔叶红松林内,使用尿素(CO(NH_2)_2)作为N源,通过向森林地表施N肥的方式对森林生态系统进行为期6年的N添加试验,探究N对森林生态系统各组分碳(C)密度及净初级生产力(NPP)的影响。施N水平分别为N0(0 kg/(hm~2·a))、N1(30 kg/(hm~2·a))、N2(60 kg/(hm~2·a))和N3(120 kg/(hm~2·a))。结果表明:N添加对森林生态系统植被C库、碎屑C库及土壤C库C密度均无显著影响(P>0.05);对整个森林生态系统的NPP无显著影响,然而对针叶NPP表现出显著抑制作用(P<0.05),对阔叶NPP表现出显著促进作用。土壤全N含量不受施N影响,但与土壤有机C浓度呈现极显著(P<0.01)的正相关关系,表明土壤全N含量是土壤有机C的重要影响因素。
译  名：
Impacts of nitrogen addition on net primary productivity in the typical mixed broadleaved-Korean pine forest
作  者：
MAO Hong-rui;JIN Guang-ze;Center for Ecological Research, Northeast Forestry University;
关键词：
nitrogen;;carbon density;;net primary productivity(NPP);;typical mixed broadleaved-Korean pine forest;;soil total nitrogen concentration;;soil organic carbon concentration
摘  要：
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( N1,30kg/( 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.

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