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.
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)
