生态学杂志2012，Vol.31Issue(10)：2466-2472,7.
松嫩平原旱生芦苇群落土壤呼吸动态及影响因子
Dynamics of soil respiration under Phragmites australis community in dry habitats of Songnen Plain and related affecting factors
摘要
Abstract
Soil respiration is one of the important components in global carbon cycle, and a sensitive indicator of many soil processes that control soil metabolism. In order to understand the dynamics of soil respiration under the Phragmites australis community in dry habitats of Songnen Plain, Northeast China, a field observation on the soil respiration was conducted from May to October 2011 by using LI-6400 automated soil C02 flux system. There existed obvious diurnal and seasonal patterns of the soil respiration. The diurnal curve of the soil respiration was unimod-al, with the peak appeared at 11:00-13:00, and the seasonal change of the soil respiration was with the maximum (4.8 μmol o m~2 o s-1) in July and August and the minimum (1.51 μmol · m-2 · s-1 ) in October. The main factor affecting the soil respiration was temperature. The soil respiration rate was significantly correlated with the near-ground ambient air temperature and the soil temperature at depths 0-10, 10-20, and 20-30 cm, of which, near-ground ambient air temperature and the soil temperature at depth 0-10 cm were the two most important controlling factors. The Ql0 values of the soil respiration from May to October varied from 1.2 to 1. 65, with a mean value of 1. 39 and a coefficient of variation of 15. 4%. Soil moisture content and near-ground air humidity were not the main environmental factors affecting the soil respiration.关键词
芦苇群落/土壤呼吸/动态变化/影响因子Key words
Phragmites australis community/ soil respiration/ dynamic change/ affecting factor.分类
农业科技引用本文复制引用
王铭,刘兴土,李秀军,张继涛,王国栋..松嫩平原旱生芦苇群落土壤呼吸动态及影响因子[J].生态学杂志,2012,31(10):2466-2472,7.基金项目
国家重点基础研究发展计划项目(2012CB956103)资助. （2012CB956103）
