Topographic controls on the variability of soil respiration in a humid subtropical forest

2019 ◽  
Vol 145 (1-2) ◽  
pp. 177-192 ◽  
Author(s):  
Qiuxiang Tian ◽  
Dongya Wang ◽  
Yanan Tang ◽  
Yi Li ◽  
Min Wang ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Subtropical Forest ◽  
Topographic Controls

Response of soil respiration to nitrogen addition in two subtropical forest types

Pedosphere ◽  
2020 ◽  
Vol 30 (4) ◽  
pp. 478-486 ◽  
Author(s):  
Wende YAN ◽  
Xiaoyong CHEN ◽  
Yuanying PENG ◽  
Fan ZHU ◽  
Wei ZHEN ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Nitrogen Addition ◽  
Subtropical Forest ◽  
Forest Types

scholarly journals Responses of soil respiration to elevated carbon dioxide and nitrogen addition in young subtropical forest ecosystems in China

2010 ◽  
Vol 7 (1) ◽  
pp. 315-328 ◽  
Author(s):  
Q. Deng ◽  
G. Zhou ◽  
J. Liu ◽  
S. Liu ◽  
H. Duan ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Elevated Co2 ◽  
Forest Ecosystems ◽  
N Deposition ◽  
Subtropical Forest ◽  
N Addition ◽  
Above Ground Biomass ◽  
Respiration Rates ◽  
Ambient Co2 ◽  
Ambient N Deposition

Abstract. Global climate change in the real world always exhibits simultaneous changes in multiple factors. Prediction of ecosystem responses to multi-factor global changes in a future world strongly relies on our understanding of their interactions. However, it is still unclear how nitrogen (N) deposition and elevated atmospheric carbon dioxide concentration [CO2] would interactively influence forest floor soil respiration in subtropical China. We assessed the main and interactive effects of elevated [CO2] and N addition on soil respiration by growing tree seedlings in ten large open-top chambers under CO2 (ambient CO2 and 700 μmol mol−1) and nitrogen (ambient and 100 kg N ha−1 yr−1) treatments. Soil respiration, soil temperature and soil moisture were measured for 30 months, as well as above-ground biomass, root biomass and soil organic matter (SOM). Results showed that soil respiration displayed strong seasonal patterns with higher values observed in the wet season (April–September) and lower values in the dry season (October–March) in all treatments. Significant exponential relationships between soil respiration rates and soil temperatures, as well as significant linear relationships between soil respiration rates and soil moistures (below 15%) were found. Both CO2 and N treatments significantly affected soil respiration, and there was significant interaction between elevated [CO2] and N addition (p<0.001, p=0.003, and p=0.006, respectively). We also observed that the stimulatory effect of individual elevated [CO2] (about 29% increased) was maintained throughout the experimental period. The positive effect of N addition was found only in 2006 (8.17% increased), and then had been weakened over time. Their combined effect on soil respiration (about 50% increased) was greater than the impact of either one alone. Mean value of annual soil respiration was 5.32 ± 0.08, 4.54 ± 0.10, 3.56 ± 0.03 and 3.53 ± 0.03 kg CO2 m−2 yr−1 in the chambers exposed to elevated [CO2] and high N deposition (CN), elevated [CO2] and ambient N deposition (CC), ambient [CO2] and high N deposition (NN), and ambient [CO2] and ambient N deposition (CK as a control), respectively. Greater above-ground biomass and root biomass was obtained in the CN, CC and NN treatments, and higher soil organic matter was observed only in the CN treatment. In conclusion, the combined effect of elevated [CO2] and N addition on soil respiration was apparent interaction. They should be evaluated in combination in subtropical forest ecosystems in China where the atmospheric CO2 and N deposition have been increasing simultaneously and remarkably.

scholarly journals Nitrogen Addition Altered the Effect of Belowground C Allocation on Soil Respiration in a Subtropical Forest

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0155881 ◽  
Author(s):  
Tongxin He ◽  
Qingkui Wang ◽  
Silong Wang ◽  
Fangyue Zhang
Keyword(s):  
Soil Respiration ◽  
Nitrogen Addition ◽  
Subtropical Forest

Potential effects of warming on soil respiration and carbon sequestration in a subtropical forest

2016 ◽  
Vol 409 (1-2) ◽  
pp. 247-257 ◽  
Author(s):  
Yiyong Li ◽  
Guoyi Zhou ◽  
Wenjuan Huang ◽  
Juxiu Liu ◽  
Xiong Fang
Keyword(s):  
Carbon Sequestration ◽  
Soil Respiration ◽  
Subtropical Forest

scholarly journals Effect of clear-cutting silviculture on soil respiration in a subtropical forest of China

2013 ◽  
Vol 6 (5) ◽  
pp. 335-348 ◽  
Author(s):  
Y. Ma ◽  
Y. Geng ◽  
Y. Huang ◽  
Y. Shi ◽  
P. A. Niklaus ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Subtropical Forest ◽  
Clear Cutting

Precipitation frequency controls interannual variation of soil respiration by affecting soil moisture in a subtropical forest plantation

2011 ◽  
Vol 41 (9) ◽  
pp. 1897-1906 ◽  
Author(s):  
Yidong Wang ◽  
Qingkang Li ◽  
Huimin Wang ◽  
Xuefa Wen ◽  
Fengting Yang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Interannual Variation ◽  
Pinus Elliottii ◽  
Subtropical Forest ◽  
Annual Rainfall ◽  
Precipitation Pattern ◽  
Humid Climate ◽  
Precipitation Frequency ◽  
Data Set

Despite the significance of interannual variation of soil respiration (RS) for understanding long-term soil carbon dynamics, factors that control the interannual variation of RS have not been sufficiently investigated. Interannual variation of RS was studied using a 6-year data set collected in a subtropical plantation dominated by an exotic species, slash pine (Pinus elliottii Engelm.), in China. The results showed that seasonal variation of RS was significantly affected by soil temperature and soil water content (SWC). RS in the dry season (July–October) was constrained by seasonal drought. Mean annual RS was estimated to be 736 ± 30 g C·m–2·year–1, with a range of 706–790 g C·m–2·year–1. Although this forest was characterized by a humid climate with high precipitation (1469 mm·year–1), the interannual variation of RS was attributed to the changes of annual mean SWC (R2 = 0.66, P = 0.03), which was affected by annual rainfall frequency (R2 = 0.80, P < 0.01) and not rainfall amount (P = 0.84). Consequently, precipitation pattern indirectly controlled the interannual variation of RS by affecting soil moisture in this subtropical forest. In the context of climate change, interannual variation of RS in subtropical ecosystems is expected to increase because of the predicted changes of precipitation regime.

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