不同相思林叶片-凋落叶-土壤的生态化学计量特征  

Ecological stoichiometry characteristics of leaf-leaf litter-soil of different Acacia plantations

作　　者：周丽丽 李树斌[2] 吴亚岚 郑茹萍[2] 袁宗胜 潘辉[1] ZHOU Lili;LI Shubin;WU Yalan;ZHENG Ruping;YUAN Zongsheng;PAN Hui(College of Geography and Oceanography,Minjiang University,Fuzhou 350108,China;Forestry College,Fujian Agriculture and Forestry University,Fuzhou 350002,China;College of Environment and Safety Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]闽江学院地理与海洋学院,福建福州350108 [2]福建农林大学林学院,福建福州350002 [3]福州大学环境与安全工程学院,福建福州350108

出　　处：《植物资源与环境学报》2022年第2期64-72,共9页Journal of Plant Resources and Environment

基　　金：福建省林业科技项目([2019]16号);福建省自然科学基金资助项目(2021J011045)。

摘　　要：以福建省漳州市的厚荚相思(Acacia crassicarpa A.Cunn.ex Benth.)、黑木相思(A.melanoxylon R.Br.)、卷荚相思(A.cincinnata F.Muell.)、大叶相思(A.auriculiformis A.Cunn.ex Benth.)和马占相思(A.mangium Willd.)5种人工林为研究对象,对叶片、凋落叶和土壤的C、N、P含量及其化学计量比进行测定和比较,并对各指标进行Pearson相关性分析。结果显示:供试林分的叶片、凋落叶和土壤的C含量变幅分别为562.52~592.83、532.04~563.51和11.32~19.44 g·kg^(-1),N含量变幅分别为21.28~29.74、10.58~15.57和1.12~1.76 g·kg^(-1),P含量变幅分别为0.57~0.94、0.08~0.19和0.33~0.36 g·kg^(-1),C/N比变幅分别为19.89~27.29、36.15~53.95和8.87~15.80,C/P比变幅分别为628.77~1049.52、3266.29~7459.31、32.51~55.51,N/P比变幅分别为28.34~43.99、79.38~138.85和3.32~4.93。在5种相思林中,黑木相思林的叶片C、N、P含量均较高,其叶片和凋落叶的N/P比及土壤C/N比和C/P比均最小;马占相思林的叶片C、N、P含量均较低,但其叶片C/N比和C/P比均最大;大叶相思林的凋落叶N和P含量均最高,但其土壤N和P含量则最低;卷荚相思林的土壤N和P含量最高;厚荚相思林的凋落叶和土壤C含量均最高,但其凋落叶N和P含量均最低。5种林分叶片、凋落叶和土壤的C、N、P含量及其化学计量比均存在显著(P<0.05)差异;其中,叶片和凋落叶的C和N含量明显高于土壤,叶片P含量明显高于凋落叶和土壤,但凋落叶P含量低于土壤;C/N比、C/P比和N/P比在凋落叶中均最大,在土壤中均最小。相关性分析结果表明:仅土壤P含量与凋落叶N含量呈极显著(P<0.01)负相关,与凋落叶P含量和C/N比分别呈显著负相关和显著正相关;凋落叶N和P含量与叶片N含量呈显著负相关,凋落叶P含量与叶片C/N比呈显著正相关。综合分析结果表明:研究区域内土壤中C、N、P养分均处于较低水平,但叶片和凋落叶的养分含量均具有高C、高N和低P的特点;供试5种相Taking five plantations of Acacia crassicarpa A.Cunn.ex Benth.,A.melanoxylon R.Br.,A.cincinnata F.Muell.,A.auriculiformis A.Cunn.ex Benth.,and A.mangium Willd.in Zhangzhou City of Fujian Province as research objects,the C,N,P contents and their stoichiometric ratios in leaf,leaf litter,and soil were measured and compared,and the pearson correlation analysis was conducted on each index.The results show that the variation ranges of C contents in leaf,leaf litter,and soil of test stands are 562.52-592.83,532.04-563.51,and 11.32-19.44 g·kg^(-1),respectively,those of N contents are 21.28-29.74,10.58-15.57,and 1.12-1.76 g·kg^(-1),respectively,those of P contents are 0.57-0.94,0.08-0.19,and 0.33-0.36 g·kg^(-1),respectively,those of C/N ratios are 19.89-27.29,36.15-53.95,and 8.87-15.80,respectively,those of C/P ratios are 628.77-1049.52,3266.29-7459.31,and 32.51-55.51,respectively,those of N/P ratios are 28.34-43.99,79.38-138.85,and 3.32-4.93,respectively.Among five Acacia plantations,the C,N,P contents in leaf of A.melanoxylon plantation are the highest,while the N/P ratios in leaf and leaf litter and the C/N ratio and C/P ratio in soil are the lowest;the C,N,P contents in leaf of A.mangium plantation are relatively low,but the C/N ratio and C/P ratio in leaf are the highest;the N and P contents in leaf litter of A.auriculiformis plantation are the highest,but the N and P contents in soil are the lowest;the N and P contents in soil of A.cincinnata plantation are the highest;the C contents in leaf litter and soil of A.crassicarpa plantation are the highest,but the N and P contents in leaf litter are the lowest.There are significant(P<0.05)differences in C,N,P contents and their stoichiometric ratios among leaf,leaf litter,and soil of five stands;in which,the C and N contents in leaf and leaf litter are evidently higher than those in soil,and the P content in leaf is evidently higher than those in leaf litter and soil,but the P content in leaf litter is lower than that in soil;the C/N ratio,C/P ratio,and N/P ratio in l

关 键 词：相思林 C含量 N含量 P含量 化学计量比 Pearson相关性分析 

分 类 号：Q945.1[生物学—植物学] S792[农业科学—林木遗传育种]