模拟氮添加对油松人工林固碳的长期影响  

Long-term Effects of Simulated Nitrogen Addition on Carbon Sequestration in Pinus tabulaeformis Plantations

作　　者：王伟峰[1] 段玉玺[1] 王博[1] 李晓晶[1] 刘宗奇 刘源 WANG Wei-feng;DUAN Yu-xi;WANG Bo;LI Xiao-jing;LIU Zong-qi;LIU Yuan(Inner Mongolia Academy of Forestry Sciences,Hohhot Inner Mongolia 010010,P.R.China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010

出　　处：《西部林业科学》2020年第1期25-30,共6页Journal of West China Forestry Science

基　　金：内蒙古自然科学基金项目(2019MS03037);林业科技创新平台项目(2019132021);内蒙古应对气候变化及低碳发展财政专项资金项目(2740046)。

摘　　要：在全球气候变化背景下研究北方人工林生态系统对氮沉降的响应具有重要意义。以油松人工林为研究对象,通过野外调查和模型模拟的方法研究了不同氮添加措施对其固碳的长期影响,为人工林的可持续经营提供科学依据。结果表明,在中等立地条件下(SI=18),150年间不同氮添加处理对油松总固碳量的影响依次是:90N(636.56t/hm 2)>120N(635.57t/hm 2)>60N(620.71t/hm 2)>30N(606.36t/hm 2)>0N(588.65t/hm 2)。与对照处理(0N)相比,30N、60N、90N和120N处理都从一定程度上提高了土壤有机碳储量,这可以从一定程度上反映出氮沉降的增加对北方地区人工林生态系统固碳具有促进作用,但从90N处理开始则土壤有机碳储量基本维持稳定状态。It is important to study the response of northern plantations ecosystems to nitrogen deposition in the context of global climate change.Taking Pinus tabulaeformis plantations as the research object,the long-term effects of different nitrogen addition measures on carbon sequestration were studied by field investigation and model simulation,which provided a scientific basis for the sustainable management of plantations.The results showed that under moderate site conditions(SI=18),the effect of different nitrogen addition treatments on total carbon sequestration in 150a was in the following order:90N(636.56t/hm 2)>120N(635.57t/hm 2)>60N(620.71t/hm 2)>30N(606.36t/hm 2)>0N(588.65t/hm 2).Compared with the control treatment(0N),the treatments of 30N,60N,90N and 120N all increased the soil organic carbon storage to a certain extent,which can reflect the increase of nitrogen deposition to the extent of plantations in the northern region.The carbon sequestration in the forest ecosystem has a promoting effect,but the soil organic carbon storage has remained stable since the 90N treatment.

关 键 词：油松人工林 氮添加 固碳量 FORECAST模型 可持续经营 

分 类 号：S791.254[农业科学—林木遗传育种] S75[农业科学—林学]