会同桢楠人工幼林土壤C:N:P生态化学计量的时空特征  

Temporal and spatial characteristics of soil C:N:P ecological stoichiometry under Phoebe zhennan plantation of Huitong

作　　者：李栎[1,2] 王光军[1,2,3] 周国新[1,2] 赵月[1,2] 张艺成[1,2] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]南方林业生态应用技术国家工程实验室,湖南长沙410004 [3]湖南会同杉木林国家重点野外科学观测研究站,湖南会同418307

出　　处：《中南林业科技大学学报》2016年第2期96-100,109,共6页Journal of Central South University of Forestry & Technology

基　　金：2014年度湖南省高校创新平台开放基金项目(14K115);湖南省研究生科研创新课题项目(CX2013B355);中南林业科技大学研究生科研创新基金项目(CX2013B23)

摘　　要：以会同桢楠人工幼林地为研究对象,对土壤有机C、全N、全P含量及其化学计量时空动态特征进行研究。结果表明,不同坡位和季节的土壤养分含量及其化学计量特征均有明显不同。表层土壤养分含量显著高于底层土壤,同一土层之间有机C含量变异性较大,全N和全P变异性较小。不同坡位之间土壤养分含量呈现:下坡>中坡>上坡。土壤养分含量受季节的影响,表现为:冬季>秋季>夏季>春季;不同季节土壤的C:N、C:P、N:P呈现显著性差异(p<0.05)。全N与N:P成极显著的正相关关系,N:P主要受全N含量控制,土壤N:P的平均值为1.59,低于其他研究所得的N:P,表明了该实验地桢楠幼林土壤的N缺乏。In conjunction with Machilus plantation of Huitong as study object.Study on soil organic C, total N, total P content and its temporal and spatialdynamic stoichiometry. Theresults indicated that there were obvious differences in soil nutrient contents and their stoichiometry under different layer and slope position.Soil nutrientcontents of surface were higher than the sub-layer soil. The Chad larger variability than the P had smaller variability in same layer. The soil nutrient was different in different slope position present： lower-slope〉middle-slope 〉upper-slope. The effects of soil nutrient content was affected by season, shows winter〉autumn 〉spring 〉summer.The C：N,C：P, N：P value in different seasons showed significant difference.The N and N：P into a very significant positive correlation. So N：P is mainly controlled by the total N content. The average value of soil N：P is 1.59, and lower than other studies show that N：P. It shows Phoebe zhennan plantation soil is lack of N.

关 键 词：桢楠人工幼林 化学计量特征 时空变化 

分 类 号：S792.24[农业科学—林木遗传育种]