福州市草坪土壤恢复过程中团聚体组成及有机碳的变化  

Aggregates Composition and Organic Carbon Change in Soil Restoration Process of Fuzhou Urban Lawns

作　　者：陈哲[1] 鲁为鑫 郭晨辉 陈豪[1] 钟羡芳[1,2] 刘炜杰[1] 陈佳俐[1] 杨玉盛[1,2] 

机构地区：[1]福建师范大学地理科学学院,福州350117 [2]福建省湿润亚热带山地生态重点实验室-省部共建国家重点实验室培育基地,福州350007

出　　处：《亚热带资源与环境学报》2017年第2期38-43,共6页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金(31000321);福建省大学生创新创业训练计划项目(201510394066);福建省教育厅项目(JB14026)

摘　　要：草坪恢复以及相应的管理措施都可以增加土壤中的碳储存。采用空间换时间法,通过对福州市南江滨公园内不同建植年龄(2、8、12、14年)的草坪土壤团聚体进行分析,探究城市草坪土壤恢复过程中土壤团聚体组成的变化及其对有机碳的贡献。结果表明,各建植年龄草坪土壤的大团聚体含量占优势,各建植年龄的草坪1~0.25 mm粒级团聚体含量比例最高,其次是5~2 mm粒级团聚体,<0.053 mm团聚体均低于其他粒径的含量。在土壤恢复过程中,土壤有机碳含量逐年增加,大团聚体(>0.25 mm)中的碳含量明显高于其他粒径。0~20 cm土层各粒级团聚体有机碳含量高于20~40 cm土层。土壤团聚体对有机碳的贡献主要来自大团聚体,以1~0.25 mm粒级团聚体对土壤有机碳的贡献率最高,以<0.053 mm粒级最低;团聚体对土壤有机碳的贡献率与土壤团聚体含量的变化一致。Both soil restoration and corresponding management practices can increase soil C stock. In this study,using the methodology of＂space for time＂,change of soil aggregates and their contributions to organic C during the soil restoration of urban lawns had been explored by analyzing on soil aggregates in lawn with different cultivation years（2,8,12,14 years） in the South Riverside Park in Fuzhou.The results showed that soil macro aggregates were preponderated in lawns at various cultivation ages,and aggregates in the 1 ~ 0. 25 mm fraction occupied the highest proportion in lawns at various cultivation ages,following by 5 ~ 2 mm,aggregates in the 0. 053 mm fraction was the lowest. Content of SOC markedly increased with time during soil restoration. The C content in macro aggregates（0. 25 mm） was markedly higher than those in other sizes. As for aggregates in different particle size fractions,SOC content in soil layer of 0 ~ 20 cm was higher than those in 20 ~ 40 cm. The organic C contributed by soil aggregates resulted mainly from the macro ones. Aggregates in the 1 ~ 0. 25 mm fraction contributed most while those in the0.053 mm fraction contributed least.The change of SOC contributed from aggregates was consistent with that of soil aggregates content.

关 键 词：城市绿地 土壤恢复 土壤团聚体 有机碳 

分 类 号：S152.4[农业科学—土壤学]