江西农业大学学报2011，Vol.33Issue(4)：749-755,7.
澳大利亚亚热带不同森林土壤有机质及呼吸特性研究
Soil Organic Matter and Respiration of Different Subtropical Forests in Australia
摘要
Abstract
Soil respiration is one of the main way for carbon transfer between terrestrial and atmosphere e cosystems. Soil samples under the slash pine (Pinus elliottii Engelm. Var. Elliotttii) , hoop pine (Araucaria cunninghamii) and kauri pine (Agathis australis) populations in southern Queensland Australia were collected to investigate the effects of forest types on soil soluble organic carbon ( SOC ) , nitrogen ( SON) as well as soil respiration. The results showed that the SOC and SON contents of soil were 64.4 ~ 166.5 mg/kg, and 6.04 ~ 14.2 mg/kg, respectively. In addition, soil SON contents under the hoop pine and kauri pine were significantly higher than under the slash pine (P <0.05). After 21 d incubation, the soil respiration was the strongest under kauri pine,the potential mineralizable organic carbon (Cm) was 214.96 g CO2-C kg. The second was 182.22 g CO2 - C kg in hoop pine. Their contents were significantly higher than that in slash pine, which was 166. 14 g CO2 - C kg ( P < 0. 05 ). The order of maximum potential carbon mineralization ( Co ) was 1 117.8 in kauri pine, the second was 1 082. 1 in hoop pine, and the lowest was 783.0 in slash pine. The soil respiration was similar to soil respiration rate. Correlation analysis showed that difference was significantly correlated between Co and Cm, C- Nmicro and pH, and between Cm and pH (P <0.01). pH, TC and moisture were factors in the control of soil respiration.关键词
森林类型/可溶性有机质/土壤呼吸Key words
forest types/ soluble organic matter/ soil respiration分类
农业科技引用本文复制引用
鲁顺保,陈成榕,徐志红,郭晓敏..澳大利亚亚热带不同森林土壤有机质及呼吸特性研究[J].江西农业大学学报,2011,33(4):749-755,7.基金项目
国家自然科学基金(30860226)和江西省优秀博士论文培养计划项目(YBP08A05) （30860226）
