亚热带沟叶结缕草草坪土壤呼吸

被引：15

作者：

李熙波 ^{[1
,2
]}

杨玉盛 ^{[1
,2
]}

曾宏达 ^{[1
,2
]}

谢锦升 ^{[1
,2
]}

陈光水 ^{[1
,2
]}

朱宁 ^{[1
,2
]}

马书国 ^{[1
,2
]}

机构：

[1] 湿润亚热带山地生态省部共建国家重点实验室培育基地

[2] 福建师范大学地理科学学院

来源：

生态学报 | 2011年 / 31卷 / 08期

关键词：

土壤呼吸; 土壤温度; 生物量; 修剪; 浇水; 草坪;

D O I：

暂无

中图分类号：

S688.4 [草坪与地被植物];

学科分类号：

090706 ;

摘要：

随城市化进程加速,城市草坪生态系统释放CO2将对区域碳循环产生重要影响。采用LI-8100开路式土壤碳通量测量系统对亚热带沟叶结缕草草坪(Zoysia matrella)土壤呼吸进行为期1a的定位研究,结果表明:草坪土壤呼吸季节动态呈现为单峰曲线,全年土壤呼吸速率的变化范围在38.99—368.50 mg C.m-.2h-1之间,年通量为1684 g C.m-.2a-1。土壤温度、总生物量、以及二者的交互作用对土壤呼吸季节变化的解释程度接近,分别为89%、88%和90%,但仅二者的交互作用进入土壤呼吸的逐步回归方程,表明草坪土壤呼吸的季节变化主要受土壤温度与总生物量共同驱动。春末修剪草坪对土壤呼吸速率没有显著影响。在秋末无雨时期,浇水后1—2d土壤湿度对土壤呼吸的促进作用可掩盖同期降温的影响,使土壤呼吸速率显著升高。

引用

页码：2096 / 2105

页数：10

共 25 条

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