三峡库区兰陵溪小流域3种林分类型土壤呼吸特征

doi:10.11707/j.1001-7488.20141124

林业科学 ›› 2014, Vol. 50 ›› Issue (11): 182-187.doi: 10.11707/j.1001-7488.20141124

三峡库区兰陵溪小流域3种林分类型土壤呼吸特征

韩海燕¹, 张涛², 王鹏程³, 雷静品⁴, 曾立雄⁵, 黄志霖⁵, 肖文发⁵

1. 中国林业科学研究院荒漠化研究所北京 100091;
2. 恩施自治州林业调查规划设计院恩施 445000;
3. 华中农业大学园艺林学学院武汉 430070;
4. 中国林业科学研究院林业研究所北京 100091;
5. 中国林业科学研究院森林生态环境与保护研究所北京 100091

收稿日期:2013-07-13 修回日期:2014-09-22 出版日期:2014-11-25 发布日期:2014-12-04
通讯作者: 王鹏程
基金资助:
国家"十二五"科技支撑项目"长江流域防护林体系整体优化及调控技术研究"(2011BAD38B04);林业公益性行业科研专项"典型森林土壤碳储量分布格局及变化规律研究"(201104008).

Characteristics of Soil Respiration in Three Types of Stands in Lanlingxi Small Watershed in Three Gorges Reservoir Area

Han Haiyan¹, Zhang Tao², Wang Pengcheng³, Lei Jingpin⁴, Zeng Lixiong⁵, Huang Zhilin⁵, Xiao Wenfa⁵

1. Institute of Desertification Studies, CAF Beijing 100091;
2. Institute of Forestry Survey and Design of Enshi Enshi 445000;
3. College of Horticulture and Forestry, Huazhong Agricultural University Wuhan 430070;
4. Research Institute of Foresty, CAF Beijing 100091;
5. Research Institute of Forest Environment and Protection, CAF Beijing 100091

Received:2013-07-13 Revised:2014-09-22 Online:2014-11-25 Published:2014-12-04

摘要/Abstract

关键词: 土壤呼吸, 根呼吸, 凋落物分解, 土壤有机质分解, 温度敏感性

Abstract:

In this study, the trenching method and infrared gas exchange analyzer were used to research the characteristics of soil respiration in 3 different types of stands including coniferous forest, broad-leaved forest and conifer-broadleaved forest in Lanlingxi small watershed in Three Gorges Reservoir Area of China. The results indicated that the annual total soil respiration (R_total), root respiration (R_root), aboveground litter decomposition (R_litter) and soil organic matter (SOM) decomposition (R_SOM) of coniferous forest were 1.61, 0.47, 0.38, 0.76 μmol·m^-2 s^-1, respectively. The annual R_total,R_root,R_litterand R_SOMwere 1.47,0.35,0.16,0.96 μmol·m^-2 s^-1 for broad-leaved forest and 2.04,0.76,0.48,0.80 μmol·m^-2 s^-1 for conifer-broadleaved forest, respectively. The respiration rates of soil and its components displayed obvious seasonal dynamics with maximum rate in summer and minimum rate in winter. Soil temperature was the main factor that affected soil and its components respiration rates, and there were significant positive exponential relationships between them (P<0.05). The annual Q₁₀of R_total,R_root,R_litter and R_SOMwere 2.01,1.52,2.73 and 3.03 for coniferous forest,2.51,1.42,3.46,3.08 for broad-leaved forest and 1.86,1.14,3.00,2.32 for conifer-broadleaved forest, respectively. These results suggested that the annual Q₁₀value of R_root in the three types of stands was significantly lower than that of the total soil respiration and its other components respiration (P<0.05).

Key words: soil respiration, root respiration, litter decomposition, soil organic matter decomposition, temperature sensitivity

中图分类号:

S718.55

韩海燕, 张涛, 王鹏程, 雷静品, 曾立雄, 黄志霖, 肖文发. 三峡库区兰陵溪小流域3种林分类型土壤呼吸特征[J]. 林业科学, 2014, 50(11): 182-187.

Han Haiyan, Zhang Tao, Wang Pengcheng, Lei Jingpin, Zeng Lixiong, Huang Zhilin, Xiao Wenfa. Characteristics of Soil Respiration in Three Types of Stands in Lanlingxi Small Watershed in Three Gorges Reservoir Area[J]. Scientia Silvae Sinicae, 2014, 50(11): 182-187.

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三峡库区兰陵溪小流域3种林分类型土壤呼吸特征

Characteristics of Soil Respiration in Three Types of Stands in Lanlingxi Small Watershed in Three Gorges Reservoir Area

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