植物生态学报 ›› 2007, Vol. 31 ›› Issue (3): 386-393.DOI: 10.17521/cjpe.2007.0047
周玉梅1(), 韩士杰1,*(), 郑俊强1, 辛丽花2, 张海森1
收稿日期:
2006-06-19
接受日期:
2006-11-14
出版日期:
2007-06-19
发布日期:
2007-05-30
通讯作者:
韩士杰
作者简介:
* E-mail: hansj@iae.ac.cn基金资助:
ZHOU Yu-Mei1(), HAN Shi-Jie1,*(), ZHENG Jun-Qiang1, XIN Li-Hua2, ZHANG Hai-Sen1
Received:
2006-06-19
Accepted:
2006-11-14
Online:
2007-06-19
Published:
2007-05-30
Contact:
HAN Shi-Jie
摘要:
根呼吸与微生物呼吸的作用底物不同,二者对高浓度CO2的响应机理及敏感程度亦不同。在大气CO2浓度升高的背景下,精确区分根呼吸与微生物呼吸是构建森林生态系统碳循环模型和预测森林生态系统碳源/汇关系所必需的。根(际)呼吸与微生物呼吸对高浓度CO2的响应呈增加、降低或无明显变化等不同趋势,根(际)呼吸变化主要与根生物量明显相关,细根的作用大于粗根;土壤微生物呼吸变化存在较大的不确定性,微生物量和微生物活性与土壤微生物呼吸相关或不相关。根系统对高浓度CO2的响应会潜在地影响微生物的代谢底物,进而影响微生物呼吸强度。凡影响土壤总呼吸的生物与非生物因子都会直接或间接地影响根呼吸与土壤微生物呼吸。
周玉梅, 韩士杰, 郑俊强, 辛丽花, 张海森. CO2浓度升高对森林土壤微生物呼吸与根(际)呼吸的影响. 植物生态学报, 2007, 31(3): 386-393. DOI: 10.17521/cjpe.2007.0047
ZHOU Yu-Mei, HAN Shi-Jie, ZHENG Jun-Qiang, XIN Li-Hua, ZHANG Hai-Sen. EFFECTS OF ELEVATED CO2 CONCENTRATIONS ON SOIL MICROBIAL RESPIRATION AND ROOT/RHIZOSPHERE RESPIRATION IN FOREST SOIL. Chinese Journal of Plant Ecology, 2007, 31(3): 386-393. DOI: 10.17521/cjpe.2007.0047
物种 Species | 土壤特征 Soil characteristics | CO2浓度 CO2 concentration (μmol·mol-1) | 处理时间 Time of treatment | 根(际)呼吸 Root/rhizosphere respiration | 微生物呼吸 Microbial respiration | 实验方法 Experimental method | 实验设施 Experimental facilities | 文献来源 Reference |
---|---|---|---|---|---|---|---|---|
白蜡树 Fraxinus excelsior | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
无梗花栎 Quercus petraea | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
欧洲赤松 Pinus sylvestris | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
火炬松 P. taeda | 淋溶土 Alfisol | +200 | 4年 Four years | 降低 Decrease | 离体测定 Detached measurement | 自由CO2增加 系统FACE | et al., 2003 | |
火炬松 P. taeda | 淋溶土 Alfisol | +200 | 1年 One year | 增加 Increase | 碳同位素示 踪法Carbon isotope tracer | 自由CO2增加 系统FACE | et al., 1999 | |
火炬松 P. taeda | 灭菌的河沙 Sterilized river sand | 700 | 5个月 Five months | 增加 Increase | 培养法 Incubation | 人工气候室内 的温室Greenhouse in phytotron | et al., 1997 | |
美国黄松 P. ponderosa | 灭菌的河沙 Sterilized river sand | 700 | 5个月 Five months | 增加 Increase | 降低 Decrease | 培养法 Incubation | 人工气候室内 温室Greenhouse in phytotron | et al., 1997 |
欧洲赤松 P. sylvestris | 沙质森林土 Sandy forest soil | 700 | 6个月 Six months | 增加 Increase | 离体测定 Detached measurement | 开顶箱 OTC | et al., 1998 | |
欧洲赤松 P. sylvestris | 沙质森林土 Sandy forest soil | 700 | 6个月 Six months | 增加 Increase | 切断根法 Excised roots | 开顶箱 OTC | et al., 1998 | |
白杨Populus tremuloides 纸桦 Betula papyrifera 糖槭Acer saccharum | 沙壤土 Sandy loam | 560 | 3年 Three years | 增加 Increase | 碳同位素法 Carbon isotope | 自由CO2增加 系统FACE | et al., 2002 | |
7种热带 C3植物 Seven tropical C3 plants | 森林土 Forest soil | 610 | 530天 530 days | 增加 Increase | 底物诱导法 Substrate induction | 温室 Greenhouse | et al., 1999 | |
北美枫香 Liquidambar styraciflua | 薄层湿老 成土 Aquic hapludult | +200 | 2年 Two years | 增加 Increase | 离体测定 Detached measurement | 自由CO2增加 系统FACE | et al., 2003 | |
北美黄杉 Pseudotsuga menziesii | 森林土 Forest soil | +200 | 2年 Two years | 增加 Increase | 降低 Decrease | 双标稳定性 同位素法 Dual stable isotope | 控制环境箱 Controlled-environment chamber | et al., 2001 |
糖槭 Acer saccharum | 粉砂壤土 Silt loam | +300 | 3年 Three years | 增加 Increase | 无明显变化 No significant change | 根排除法 Root-exclusion | 开顶箱 OTC | Norby, 1999 |
美国红枫 A. rubrum | 粉砂壤土 Silt loam | +300 | 3年 Three years | 增加 Increase | 无明显变化 No significant change | 根排除法 Root-exclusion | 开顶箱 OTC | Norby, 1999 |
山胡椒 Lindera benzoin | 砂壤土 Sandy loam | 700 | 6个生长季 Six growing seasons | 增加/不变 Increase/No change | 增加 Increase | 离体测定 Detached measurement | 封闭式八角形箱 Enclosed octagonal chamber | et al., 2000 |
表1 高浓度CO2条件下土壤微生物呼吸与根(际)呼吸
Table 1 Soil microbial respiration and root/rhizosphere respiration under elevated CO2 concentrations
物种 Species | 土壤特征 Soil characteristics | CO2浓度 CO2 concentration (μmol·mol-1) | 处理时间 Time of treatment | 根(际)呼吸 Root/rhizosphere respiration | 微生物呼吸 Microbial respiration | 实验方法 Experimental method | 实验设施 Experimental facilities | 文献来源 Reference |
---|---|---|---|---|---|---|---|---|
白蜡树 Fraxinus excelsior | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
无梗花栎 Quercus petraea | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
欧洲赤松 Pinus sylvestris | 灰壤 Podsol | 700 | 20个月 20 months | 降低 Decrease | 培养法 Incubation | 开顶箱 OTC | et al., 1998 | |
火炬松 P. taeda | 淋溶土 Alfisol | +200 | 4年 Four years | 降低 Decrease | 离体测定 Detached measurement | 自由CO2增加 系统FACE | et al., 2003 | |
火炬松 P. taeda | 淋溶土 Alfisol | +200 | 1年 One year | 增加 Increase | 碳同位素示 踪法Carbon isotope tracer | 自由CO2增加 系统FACE | et al., 1999 | |
火炬松 P. taeda | 灭菌的河沙 Sterilized river sand | 700 | 5个月 Five months | 增加 Increase | 培养法 Incubation | 人工气候室内 的温室Greenhouse in phytotron | et al., 1997 | |
美国黄松 P. ponderosa | 灭菌的河沙 Sterilized river sand | 700 | 5个月 Five months | 增加 Increase | 降低 Decrease | 培养法 Incubation | 人工气候室内 温室Greenhouse in phytotron | et al., 1997 |
欧洲赤松 P. sylvestris | 沙质森林土 Sandy forest soil | 700 | 6个月 Six months | 增加 Increase | 离体测定 Detached measurement | 开顶箱 OTC | et al., 1998 | |
欧洲赤松 P. sylvestris | 沙质森林土 Sandy forest soil | 700 | 6个月 Six months | 增加 Increase | 切断根法 Excised roots | 开顶箱 OTC | et al., 1998 | |
白杨Populus tremuloides 纸桦 Betula papyrifera 糖槭Acer saccharum | 沙壤土 Sandy loam | 560 | 3年 Three years | 增加 Increase | 碳同位素法 Carbon isotope | 自由CO2增加 系统FACE | et al., 2002 | |
7种热带 C3植物 Seven tropical C3 plants | 森林土 Forest soil | 610 | 530天 530 days | 增加 Increase | 底物诱导法 Substrate induction | 温室 Greenhouse | et al., 1999 | |
北美枫香 Liquidambar styraciflua | 薄层湿老 成土 Aquic hapludult | +200 | 2年 Two years | 增加 Increase | 离体测定 Detached measurement | 自由CO2增加 系统FACE | et al., 2003 | |
北美黄杉 Pseudotsuga menziesii | 森林土 Forest soil | +200 | 2年 Two years | 增加 Increase | 降低 Decrease | 双标稳定性 同位素法 Dual stable isotope | 控制环境箱 Controlled-environment chamber | et al., 2001 |
糖槭 Acer saccharum | 粉砂壤土 Silt loam | +300 | 3年 Three years | 增加 Increase | 无明显变化 No significant change | 根排除法 Root-exclusion | 开顶箱 OTC | Norby, 1999 |
美国红枫 A. rubrum | 粉砂壤土 Silt loam | +300 | 3年 Three years | 增加 Increase | 无明显变化 No significant change | 根排除法 Root-exclusion | 开顶箱 OTC | Norby, 1999 |
山胡椒 Lindera benzoin | 砂壤土 Sandy loam | 700 | 6个生长季 Six growing seasons | 增加/不变 Increase/No change | 增加 Increase | 离体测定 Detached measurement | 封闭式八角形箱 Enclosed octagonal chamber | et al., 2000 |
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