城市绿化景观土壤呼吸变化规律及影响因素

doi:10.19741/j.issn.1673-4831.2018.0432

生态与农村环境学报 ›› 2019, Vol. 35 ›› Issue (7): 885-891.doi: 10.19741/j.issn.1673-4831.2018.0432

城市绿化景观土壤呼吸变化规律及影响因素

赵龙飞¹, 李德生¹, 滕达², 刘福德¹, 张明³

1. 天津理工大学环境科学与安全工程学院, 天津 300384;
2. 威海市滨海新城建设投资股份有限公司, 山东威海 264200;
3. 生态环境部南京环境科学研究所, 江苏南京 210042

收稿日期:2018-07-23 出版日期:2019-07-25 发布日期:2019-07-22
通讯作者: 李德生 E-mail:deshli@tjut.edu.cn
作者简介:赵龙飞(1993-),女,河北邯郸人,硕士生,主要从事环境与城市生态研究。E-mail:lf_Cici@163.com
基金资助:
国家自然科学基金（41303057）；天津市应用基础与前沿技术研究计划（14JCYBJC23000）

The Variation and Controlling Factors of Soil Respiration Rate in Urban Green Landscapes

ZHAO Long-fei¹, LI De-sheng¹, TENG Da², LIU Fu-de¹, ZHANG Ming³

1. School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China;
2. Weihai Binhai New City Construction Investment Co. Ltd., Weihai 264200, China;
3. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China

Received:2018-07-23 Online:2019-07-25 Published:2019-07-22

摘要/Abstract

摘要：

采用便携式土壤碳通量自动分析仪ACE对天津国槐梨树（GL）和银杏紫叶李（YZ）2种城市绿化景观土壤呼吸速率（R_s）及其影响因子进行测定，分析了土壤呼吸与土壤温度、土壤湿度和土壤理化性质之间的关系。结果表明：（1）2种绿化景观R_s季节变化规律基本一致，均呈现较明显的单峰变化趋势且峰值同时出现。同时，不同月份R_s变化规律之间存在一定差异。在干季，2种绿化景观R_s较低且月变幅较小，GL和YZ的R_s变化范围分别为（0.20±0.03）~（1.09±0.16）和（-0.06±0.01）~（0.26±0.05）μmol·m^-2·s^-1；在湿季，2种绿化景观R_s较高且变幅较大，GL和YZ的R_s变化范围分别为（-0.05±0.01）~（3.62±0.26）和（0.38±0.07）~（3.17±0.27）μmol·m^-2·s^-1。GL的R_s大于YZ。（2）2种绿化景观土壤10 cm处温度（T₁₀）和5 cm处湿度（M₅）对土壤呼吸过程均有重要影响，回归分析表明T₁₀和M₅对R_s变化规律的影响程度分别达45.4%~64.8%和21.1%~52.2%；（3）土壤理化性质与R_s具有一定的相关性，其中，土壤有机质含量与R_s的相关性达显著水平（P<0.05或P<0.01）。

关键词: 绿化景观, 土壤呼吸, 土壤温度, 土壤湿度

Abstract:

The soil respiration rate (R_s) and its influential factors of two green landscapes (GL and YZ) were measured using a portable automated CO₂ exchange station (ACE) during the whole growing season in Tianjin. The relationships be-tween soil respiration and its influential factors of soil temperature,soil moisture and soil physicochemical properties have been analyzed. Results show that:(1) There was basically no difference in the seasonal variation of R_s between the two different types of green landscapes,both of them showed an obvious single-peak variation and the peak appeared at the same time. Simultaneously,the variation of R_s was different in different months. In dry season,the R_s was low with few fluctuations,which ranged from (0.20±0.03) to (1.09±0.16) μmol·m^-2·s^-1 for GL,and from (-0.06±0.01) to (0.26±0.05) μmol·m^-2·s^-1 for YZ. Conversely,a relatively higher R_s with more fluctuations was noted in the wet sea-son,it seemed to be varied from (-0.05±0.01) to (3.62±0.26) μmol·m^-2·s^-1 for GL,and from (0.38±0.07) to (3.17±0.27) μmol·m^-2·s^-1 for YZ. In summary,the mean value of R_s in GL was significantly higher than that in YZ; (2) The environmental factors that influence R_s are very complicated in the two green landscapes. The two relatively im-portant factors are soil temperature at 10 cm depth (T₁₀) and soil moisture at 5 cm depth (M₅). In addition,the regression analysis show that the effective degree of T₁₀ and M₅ for R_s were 45.4%-64.8% and 21.1%-52.2%,respectively; (3) There was a certain correlation between soil physicochemical properties and R_s,in which the correlation coefficient between soil organic matter and R_s was highest in all the two green landscapes.

Key words: green landscape, soil respiration rate, soil temperature, soil moisture

中图分类号:

S154.1
X142

赵龙飞, 李德生, 滕达, 刘福德, 张明. 城市绿化景观土壤呼吸变化规律及影响因素[J]. 生态与农村环境学报, 2019, 35(7): 885-891.

ZHAO Long-fei, LI De-sheng, TENG Da, LIU Fu-de, ZHANG Ming. The Variation and Controlling Factors of Soil Respiration Rate in Urban Green Landscapes[J]. Journal of Ecology and Rural Environment, 2019, 35(7): 885-891.

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城市绿化景观土壤呼吸变化规律及影响因素

The Variation and Controlling Factors of Soil Respiration Rate in Urban Green Landscapes

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