Effects of Simulated Acid Rain on Soil Respiration of Pinus massoniana

2013 ◽  
Vol 295-298 ◽  
pp. 249-254 ◽  
Author(s):  
Nan Wang ◽  
Shang Bin Bai
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Acid Rain ◽  
Control Level ◽  
Pinus Massoniana ◽  
Sensitivity Coefficient ◽  
Simulated Acid Rain ◽  
Regression Equations ◽  
The Mean ◽  
The Impact

In order to understand the impact of acid rain on soil respiration of P. Massoniana, a field study with 3 simulated acid rain levels (pH2. 5, 4. 0 and 6. 0) were conducted. Measurement of soil respiration was made using a LI-8100 soil CO2 emission system, the soil temperature at 10 cm depth also was recorded. Results show that: (1) The soil respiration of P. Massoniana under different acid rain levels fluctuated with distinct seasonal patterns and the soil respiration rate was influenced significantly by soil temperature. The mean rate of soil respiration under pH2.5 level were 1.79μmol m-2s-1, and increased 16% under control level (pH6.0) respectively. The mean rate of root respiration under pH2.5 level were 1.03μmol m-2s-1, and increased 12% under control level (pH6.0) respectively.(2) Significant relationships between soil respiration and soil temperature at 10 cm under different acid rain levels of P. massoniana found, which could be best described by exponential equations. The regression equations had more predicative capability than those using only temperature as a single independent variable. (3) The Q10 (temperature sensitivity coefficient of soil respiration) values at pH2.5, 4.0 levels of P. Massoniana were 1.40, 2.05, respectively. Compared with which at control level, the Q10 values tended to increase.

scholarly journals Effects of simulated acid rain on soil respiration rate and soil bacterial diversity in aPhyllostachyspubescensforest in subtropical China

2019 ◽  
Author(s):  
Nan Wang ◽  
Xiaocheng Pan
Keyword(s):  
Soil Respiration ◽  
Acid Rain ◽  
Bacterial Diversity ◽  
Respiration Rate ◽  
Simulated Acid Rain ◽  
Subtropical China ◽  
Soil Bacterial Diversity ◽  
Soil Respiration Rate ◽  
Respiration Rates ◽  
Soil Bacterial

AbstractAcid rain has been regarded as a global environmental concern due to its negative effects on global ecosystems. In this study, we investigated the effects of simulated acid rain (SAR) on soil respiration rate and soil bacterial diversity in a Moso bamboo (phyllostachyspubescens) forest in subtropical China. Experimental results showed a similar seasonal pattern of soil respiration rates underdifferent SAR treatments. Seasonal mean soil respiration rates for CK (control, deionized water, pH 6.7), T1 (pH 5.6), T2 (pH 4.0) and T3 (pH 2.5) treatments were 3.44, 4.80, 4.35 and 4.51 μ mol m−2s−1, respectively. One-way analysis of variance indicated that the SAR exposure had no significant effect on soil respiration (p>0.1) and soil microbial biomass (p>0.1). Soil bacterial community diversity was calculated as the Shannon-Wiener diversity index and the results showed that only T3 treatment had significant effects on soil bacterial diversity. The DGGE analysis results revealed that T1 and CK soils had closer association and were related to the T2 soil, while T3 soil was distinctly different from the other treatments. This work highlights that the effects of SAR are important to consider in assessing the soil respiration rate, particularly under the scenario of increasing acid rain pollution.

scholarly journals RETRACTED ARTICLE: A 2-D DIGE analysis of simulated acid rain-responsive proteins in Pinus massoniana needles

Trees ◽  
2012 ◽  
Vol 26 (5) ◽  
pp. 1677-1677
Author(s):  
Ting-Wu Liu ◽  
Wen-Jun Hu ◽  
Xiao-Qin Wang ◽  
Li Niu ◽  
Bin Fu ◽  
...  
Keyword(s):  
Acid Rain ◽  
Pinus Massoniana ◽  
Simulated Acid Rain ◽  
Retracted Article ◽  
Dige Analysis

An automated chamber system for measuring soil respiration

1998 ◽  
Vol 78 (4) ◽  
pp. 573-579 ◽  
Author(s):  
S. M. McGinn ◽  
O. O. Akinremi ◽  
H. D. J. McLean ◽  
B. Ellert
Keyword(s):  
Soil Respiration ◽  
Bowen Ratio ◽  
Mean Value ◽  
Chamber System ◽  
Carbon Loss ◽  
Agronomic Management ◽  
Dynamic Chamber ◽  
The Mean ◽  
The Impact ◽  
Second Period

To quantify the net effect of agricultural systems on CO2 emissions to the atmosphere, the amount of carbon fixed (primary production) and emitted (soil respiration) under different agronomic management must be estimated. A dynamic chamber system was constructed to automatically measure CO2 concentration in chambers and provide diurnal flux estimates of soil respiration. In fallow, the mean respiration was measured over 4 d using four chambers and ranged from 6.5 to 8.6 g m−2 d−1. During this time, the coefficient of variation between chambers ranged from 9 to 18%. The mean daily soil respiration in fallow was also measured over a second period (13 d) using both chambers and a Bowen ratio technique. The mean value from the chambers was 6.4 g m−2 d−1, which was not significantly (P > 0.05) different from that Bowen ratio value of 7.1 g m−2 d−1. The chambers were also utilized to measure the impact of tillage on soil respiration for 11 d following tillage. During this period, the tilled plot lost 92 kg ha−1 of carbon compared with 52 kg ha−1 from the untilled plot. Approximately half of the total tillage-induced carbon loss from soil occurred in the first 48 h. Key words: Soil respiration, carbon dioxide, soil chamber, tillage, Bowen ratio

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