福州江滨公园不同植被类型土壤可溶性有机碳含量的季节动态  

Seasonal Dynamics of Soil Dissolved Organic Carbon Content of Urban Park Vegetations in Fuzhou

作　　者：陈佳俐[1] 钟羡芳[1,2] 刘炜杰[1] 林金煌[1] 陈哲[1] 陈光水[1,2] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [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》2016年第3期88-94,共7页Journal of Subtropical Resources and Environment

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

摘　　要：对福州市南江滨公园内典型的3种植被类型:阔叶树种(黄花槐)和针叶树种(南洋杉)及草坪的可溶性有机碳(Dissolved organic carbon,DOC)含量进行研究,分析城市不同植被类型土壤DOC平均含量、季节动态及其与土壤有机碳间的相关关系。结果表明:1)0~20 cm土层中南洋杉、黄花槐和草坪土壤DOC平均含量分别为33.78 mg·kg^(-1)、84.77 mg·kg^(-1)和64.59 mg·kg^(-1),大小顺序为:黄花槐>草坪>南洋杉,针叶树种(南洋杉)土壤DOC含量低于阔叶树种(黄花槐),不同植被类型的土壤DOC含量具有显著差异(P<0.05)。2)城市不同植被类型土壤DOC含量的季节动态明显。南洋杉和黄花槐土壤DOC含量季节变化模式均为:夏季>秋季>春季>冬季;而草坪土壤DOC含量季节变化模式为:秋季>夏季>春季>冬季。研究认为,土壤DOC含量的季节差异不仅与温度、降水等因素有关,植被类型也是产生差异的重要因素。The content of DOC, its seasonal dynamic and the correlation between it and soil organic carbon of different vegetations in Fuzhou urban park were studied. Broadleaved forest （ Sophora xanthantha） , coniferous forest （Araucaria cunninghamii） and the lawn （Zoysia matrella） were chosen. Results showed that ： 1 ） the average DOC content of Araucaria cunninghamii, Sophora xanthantha and lawns soil （0 - 20 cm） were 33.78 mg·kg^-1, 84.77 mg ·kg^-1 and 64.59 mg·kg^-1, which indicated ： Sophora xanthantha 〉 lawn 〉 Araucaria cunninghamii, the DOC content of coniferous tree species （Araucaria cunninghamii） is lower than the broadleaved forest （Sophora xanthantha） , the DOC content of different vegetation types had significant difference （P 〈 0. 05 ）. 2 ） seasonal dynamics of DOC content appeared to be obvious in different urban vegetation types. Seasonal variation patterns of DOC of Araucaria cunninghamii and Sophora xanthantha forest were： summer 〉 autumn 〉 spring 〉 winter ; while seasonal variation patterns of lawn was ： autumn 〉 summer 〉 spring 〉 winter. The results suggested that seasonal differences of soil dissolved organic carbon content is not only related to factors such as temperature and precipitation, vegetation type is also an important factor.

关 键 词：植被类型 可溶性有机碳(DOC) 季节动态 福州 

分 类 号：S154[农业科学—土壤学]