川中丘陵区人工柏木林不同器官C、N、P、K计量特征  

Stoichiometric Characteristics of C,N,P,K in Different Organs of Artificial Cypress Plantation in Hilly Areas of Central Sichuan

作　　者：刘威君 陈俊华[2] 蒋川东 刘一丁 谢川 唐艺家 罗明华 慕长龙[2] LIU Weijun;CHEN Junhua;JIANG Chuandong;LIU Yiding;XIE Chuan;TANG Yijia;LUO Minghua;MU Changlong(School of Resources and Environmental Engineering,Mianyang Teachers’University,Mianyang Sichuan 621006;Sichuan Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland,Sichuan Academy of Forestry.Chengdu 610081,China)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621006 [2]四川省林业科学研究院/森林和湿地生态恢复与保育四川省重点实验室,四川成都610081

出　　处：《四川林业科技》2023年第4期43-48,共6页Journal of Sichuan Forestry Science and Technology

基　　金：世行贷款长江上游森林生态系统恢复项目科技成果推广或科研课题研究项目(510201202038776/2);四川省基本科研经费项目“川中丘陵区人工柏木林碳计量研究”(2022JBKY08);绵阳师范学院研究生创新实践基金资助(CX202338)。

摘　　要：为了解川中丘陵区人工柏木林各器官C、N、P、K的生态化学计量特征,掌握养分元素在柏木林中分配格局及各器官养分受限状况等情况,对该区域的人工柏木林叶、枝、干、皮、根等各器官进行取样,分析其含水率、C、N、P、K含量、C/N、C/P以及各元素之间的相关性,结果表明:(1)叶片中C、N、P、K含量均显著高于其他器官;C/N最高的是枝(69.25±13.09),最小的是叶(34.05±8.41)。各器官的C/P差异较大。其中叶的C/P最小(602.66±208.75)。叶的C含量与皮、枝差异不显著(P>0.05),与干、根的C含量之间差异显著(P<0.05)。叶和皮的N含量与其他器官的N含量之间差异均显著(P<0.05),干、根、枝的N含量之间差异不显著(P>0.05)。叶的P含量与其他器官之间差异显著(P<0.05),其余器官之间均差异不显著(P>0.05)。皮和叶的C/N与其他器官之间差异均显著(P<0.05),干、根、枝的C/N之间差异均不显著(P>0.05)。根的C/P与干、枝之间差异不显著(P>0.05),与皮、叶的C/P差异显著(P<0.05)。皮的C/P与叶、枝之间差异不显著(P>0.05),叶的C/P除与皮之间差异不显著外(P>0.05),与其他器官之间均差异显著(P<0.05)。(2)C含量在各器官中的变异系数均在7%以下,属弱变异;N含量除干属弱变异外,其余均属于中等变异;P含量除在叶和枝中属于中等变异外,在干、根、皮中属强变异;K含量表现的规律与P含量类似。(3)N与C呈显著正相关(P<0.05),与P、K呈极显著正相关(P<0.01),与C/P呈极显著负相关(P<0.01);C含量与K呈显著正相关(P<0.05),与C/N呈显著负相关(P<0.05);P含量与K呈极显著正相关(P<0.01),与C/P呈极显著负相关(P<0.01);K含量与C/N、C/P均呈极显著负相关(P<0.01);C/N与C/P呈极显著正相关(P<0.01)。(4)柏木林N、P含量相对紧缺,应合理增施N、P肥,或采取间伐补植桤木等豆科植物形成混交林,提高土壤能力,促进林地养分循环。In order to understand the ecological and chemical metrological characteristics of C,N,P,K in various organs of the artificial cypress forest in the hilly area of central Sichuan,master the distribution pattern of nutrient elements in the cypress forest and the nutrient restriction status of various organs,samples were taken from the leaves,branches,trunks,bark,roots and other organs of the artificial cypress forest in this area to analyze their water content,C,N,P,K content,C/N,C/P and the correlation between various elements,The results showed that:(1)The contents of C,N,P,K in leaves were significantly higher than those in other organs;The highest C/N was in branches(69.25±13.09)and the lowest was in leaves(34.05±8.41).The C/P of each organ varies greatly.The C/P of leaves was the lowest(602.66±208.75).There was no significant difference between leaf C content and bark and branch C content(P>0.05),but there was significant difference between leaf C content and stem and root C content(P<0.05).There was significant difference between the N content of leaves and bark and that of other organs(P<0.05),but there was no significant difference between the N content of stems,roots and branches(P>0.05).The P content in leaves was significantly different from that in other organs(P<0.05),but not in other organs(P>0.05).The C/N of bark and leaf were significantly different from that of other organs(P<0.05),while the C/N of trunk,root and branch were not significantly different(P>0.05).There was no significant difference in C/P between root,stem and branch(P>0.05),but significant difference in C/P between root,bark and leaf(P<0.05).There was no significant difference between the C/P of bark and that of leaves and branches(P>0.05).Except that there was no significant difference between the C/P of leaves and bark(P>0.05),there was significant difference between the C/P of leaves and other organs(P<0.05).(2)The coefficient of variation of C content in all organs was below 7%,which belonged to weak variation;Except for the

关 键 词：川中丘陵区 人工柏木林 生态化学计量特征 

分 类 号：S718.5[农业科学—林学]