应用生态学报2017，Vol.28Issue(9)：2787-2793,7.DOI:10.13287/j.1001-9332.201709.020
黄土高原不同林龄刺槐林碳、氮、磷化学计量特征
C, N and P stoichiometry characteristics of different-aged Robinia pseudoacacia plantations on the Loess Plateau, China
摘要
Abstract
Three different stand ages of Robinia pseudoacacia plantations,including young plantation (5-10 years old),middle-age plantation (11-15 years old),and mature plantation (21-30 years old),were selected as the objects,to explore the contents of C,N and P and their ecological stoichiometry characteristics in roots,stems,leaves and litter.The results showed that carbon,nitrogen and phosphorus contents varied in the range of 376.74-486.67,8.66-29.70 and 0.79-1.95 g· kg-1,respectively in different components of R.pseudoacacia plantations with different ages.There was a low variability of C content,a high variability of P content.The high C content was found in middle-age plantation,and the high N and P contents were found in mature plantation.The high C,N and P contents were found in leaves,and the low N content was found in stems for different-aged R.pseudoacacia plantations.C/N,C/P and N/P in different components of R.pseudoacacia plantation were 15.74-53.40,242.47-606.39 and 8.10-20.57,respectively.C/N,C/P and N/P of stems in mid-mature plantation and young plantation were significantly higher than those in mature plantation.C/N and C/P were high in stems,and C/N and C/P was low in leaves in different-aged R.pseudoacacia plantations.There was no correlation among carbon,nitrogen and phosphorus contents in leaves and roots of R.pseudoacacia plantations,but significant positive correlation between the nitrogen content and phosphorus content in litter and stems.It indicated that the litter and stems were built on the proportional input of nitrogen and phosphorus elements.Compared with the global scale,R.pseudoacacia plantation in the Loess Plateau had the high carbon storage capacity,abundant nitrogen content and relative lack of phosphorus,which became the major limiting factor for growth of R.pseudoacacia plantation.关键词
碳/氮/磷/林龄/刺槐/黄土高原Key words
carbon/nitrogen/phosphorus/plantation age/Robinia pseudoacacia/Loess Plateau引用本文复制引用
马任甜,安韶山,黄懿梅..黄土高原不同林龄刺槐林碳、氮、磷化学计量特征[J].应用生态学报,2017,28(9):2787-2793,7.基金项目
本文由国家自然科学基金项目(41671280)和国家科技支撑计划项目(2015BAC01B01)资助 （41671280）
This work was supported by the National Natural Science Foundation of China (41671280),and the National Key Technology R&D Program of China (2015BAC01B01). （41671280）
