内蒙古赤峰市油松人工林植物和土壤C、N、P生态化学计量特征  

Plants and Soil C,N and P Ecological Stoichiometry of Pinus tabulaeformis Plantations in Chifeng City,Inner Mongolia

作　　者：唐学君[1,2] 王伟峰 肖舜祯[2] 张旭东 TANG Xuejun;WANG Weifeng;XIAO Shunzhen;ZHANG Xudong(Research Institute of Forestry, Chinese Academy of Forestry Sciences, Beijing 100091, China;East China Inventory and Planning Institute, State Forestry and Grassland Administration, Hangzhou 310019, China;Research Institute of Ecological Function and Forest Carbon Sink, Inner Mongolia Academy of Forestry Sciences, Hohhot 010010, China)

机构地区：[1]中国林业科学研究院林业研究所,北京100091 [2]国家林业和草原局华东调查规划设计院,杭州310019 [3]内蒙古林业科学研究院生态功能与森林碳汇研究所,呼和浩特010010

出　　处：《地域研究与开发》2020年第3期162-167,共6页Areal Research and Development

基　　金：内蒙古自然科学基金项目(2019MS03037)。

摘　　要：基于野外实测数据和文献资料数据,对内蒙古赤峰市喀喇沁旗西南部的旺业甸实验林场进行了不同林龄油松人工林各组分的C、N、P生态化学计量特征分析,为油松人工林的可持续经营和固碳潜力的提升提供科学依据。结果表明:油松人工林叶C、N、P含量分别为511.41 mg/g,10.24 mg/g,1.23 mg/g,总体表现出在幼龄林时C、N含量低,P含量高;随着林龄的增大P含量降低,C、N含量增高。在幼龄林时叶C∶N最大为61.38,叶C∶P和N∶P最小分别为385.78和6.28;随着林龄增大C∶N先减小后增大,C∶P和N∶P先增大后减小,而所有N∶P均小于14,判断该地区油松人工林生长主要受N的限制。土壤C、N、P含量均随土层深度增加逐渐降低,土壤C、N、P的平均含量分别为4.92 mg/g,0.47 mg/g,0.27 mg/g。土壤表层C含量在幼龄林时最小,随着林龄的增加逐渐增高并在近熟林时达到最大值,N、P含量在幼龄林时最大;随着林龄的增加逐渐减小。土壤C、N、P的供应量对叶C、N、P含量存在一定影响,土壤C、N、P含量在不同土层间的相关性较强。Based on field measured data and literature data,the ecological stoichiometric characteristics of C,N and P components of Pinus tabulaeformis plantations in different ages were analyzed,and this study can provide a scientific basis for the sustainable management of the Pinus tabulaeformis plantations and the enhancement of carbon sequestration potential.The results showed that the contents of C,N and P in the leaves of Pinus tabulaeformis plantations were 511.41,10.24 and 1.23 mg/g,respectively.The overall content of C and N in young forests was low,and the content of P was high.The content is decreased,and the C and N contents are increased.In young forests,the maximum C∶N is 61.38,and the minimum C∶P and N∶P are 385.78 and 6.28,respectively.As the forest age increases,C∶N decreases first and then increases,C∶P and N∶P increases first and then decreases,and all N∶P values are less than 14,so it is judged that the growth of Pinus tabulaeformis plantations in this area is mainly limited by N.The contents of C,N and P in the soil of Pinus tabulaeformis plantations decreased with the increase of soil depth.The average contents of soil C,N and P were 4.92,0.47 and 0.27 mg/g,respectively.The C content in the soil surface was the smallest in young forests,and increased with the increase of forest age and reached the maximum in the near mature forest.The N and P contents were the largest in young forests and gradually decreased with the increase of forest age.The supply of soil C,N and P has certain influence on the contents of leaf C,N and P,and the contents of soil C,N and P was highly correlated among different soil layers.

关 键 词：油松人工林 生态化学计量特征 相关性分析 赤峰市 

分 类 号：S757.2[农业科学—森林经理学]