不同树龄橡胶林土壤微生物生物量碳的垂直分布特性  

Vertical Distribution of the Soil Microbial Biomass Carbon in Rubber Plantations with Different Ages

作　　者：王春燕[1,2] 陈秋波[1] 李光明[1,3] 安锋[1,4] 杨礼富[1] 王真辉[1] 

机构地区：[1]中国热带农业科学院橡胶研究所/农业部橡胶树生物学重点开放实验室,海南儋州571737 [2]海南省农垦科学院,海口570206 [3]海南大学环境与植物保护学院,海口571737 [4]Institute for Technology Reserch and Innovation, Deakin University,Geelong, Victoria, 3217, Australia

出　　处：《林业资源管理》2012年第2期59-64,共6页Forest Resources Management

基　　金：中央级公益性科研院所基本科研业务费专项资金(XJSYWFZX2008-18,XJSYWFZX2009-30)资助项目

摘　　要：采用时空替代法,选取4,12,19,24,29 a橡胶林,研究不同树龄土壤微生物生物量碳含量的分布特征及其与有机碳含量的比值、以及与土壤养分含量的相关关系。结果表明:4,12,19,24,29 a橡胶林不同土层微生物生物量碳含量在28.87～138.71mg/kg之间,随土层深度的增加明显下降;土壤微生物生物量碳含量和有机碳的比值在0.66%～2.10%之间,土壤碳处于积累状态;土壤微生物生物量碳含量与有机碳、全氮、全磷含量有显著的相关性,相关系数R>72%。The rubber plantations with the chronosequences of 4 a,12 a,19 a,24 a and 29 a were selected to investigate the vertical variations of the soil microbial biomass carbon（SMBC）and their relationships with the ratio of soil organic carbon（SOC）and soil nutrients.The results showed that SMBC in all the 5 different aged rubber plantations increased with soil depth and varied from 28.87 to 138.71（mg/kg）.The ratios of SMBC ：SOC in the rubber plantations were between 0.66%~2.10%,therefore the soil carbon was in accumulating state.In addition,markedly positive correlation was identified between SMBC and SOC,soil total nitrogen and soil total phosphorus,correlation coefficient R72%.

关 键 词：橡胶林 土壤微生物生物量碳 土壤有机碳 

分 类 号：S794.1[农业科学—林木遗传育种] S714.3[农业科学—林学]