scholarly journals Seasonal dynamics of soil respiration and N mineralization in chronically warmed and fertilized soils

Ecosphere ◽  
2011 ◽  
Vol 2 (3) ◽  
pp. art36 ◽  
Author(s):  
A. R. Contosta ◽  
S. D. Frey ◽  
A. B. Cooper
Keyword(s):  
Soil Respiration ◽  
Seasonal Dynamics ◽  
N Mineralization

scholarly journals Effect of 50 Years of No-Tillage, Stubble Retention, and Nitrogen Fertilization on Soil Respiration, Easily Extractable Glomalin, and Nitrogen Mineralization

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 151
Author(s):  
Pramod Jha ◽  
Kuntal M. Hati ◽  
Ram C. Dalal ◽  
Yash P. Dang ◽  
Peter M. Kopittke ◽  
...  
Keyword(s):  
Soil Respiration ◽  
N Mineralization ◽  
Positive Impact ◽  
N Fertilization ◽  
N Fertilizer ◽  
N Availability ◽  
Soil Microbial ◽  
Stubble Retention ◽  
No Till

In subtropical regions, we have an incomplete understanding of how long-term tillage, stubble, and nitrogen (N) fertilizer management affects soil biological functioning. We examined a subtropical site managed for 50 years using varying tillage (conventional till (CT) and no-till (NT)), stubble management (stubble burning (SB) and stubble retention (SR)), and N fertilization (0 (N0), 30 (N30), and 90 (N90) kg ha−1 y−1) to assess their impact on soil microbial respiration, easily extractable glomalin-related soil protein (EEGRSP), and N mineralization. A significant three-way tillage × stubble × N fertilizer interaction was observed for soil respiration, with NT+SB+N0 treatments generally releasing the highest amounts of CO2 over the incubation period (1135 mg/kg), and NT+SR+N0 treatments releasing the lowest (528 mg/kg). In contrast, a significant stubble × N interaction was observed for both EEGRSP and N mineralization, with the highest concentrations of both EEGRSP (2.66 ± 0.86 g kg−1) and N mineralization (30.7 mg/kg) observed in SR+N90 treatments. Furthermore, N mineralization was also positively correlated with EEGRSP (R2 = 0.76, p < 0.001), indicating that EEGRSP can potentially be used as an index of soil N availability. Overall, this study has shown that SR and N fertilization have a positive impact on soil biological functioning.

scholarly journals Seasonal dynamics of soil respiration and nitrification in three subtropical plantations in southern China

2016 ◽  
Vol 9 (5) ◽  
pp. 813-821 ◽  
Author(s):  
W Wang ◽  
R Cheng ◽  
Z Shi ◽  
J Ingwersen ◽  
D Luo ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Seasonal Dynamics ◽  
Southern China

scholarly journals Pure stands of temperate forest tree species modify soil respiration and N turnover

2005 ◽  
Vol 2 (2) ◽  
pp. 303-331 ◽  
Author(s):  
N. Brüggemann ◽  
P. Rosenkranz ◽  
H. Papen ◽  
K. Pilegaard ◽  
K. Butterbach-Bahl
Keyword(s):  
Soil Respiration ◽  
Tree Species ◽  
N Mineralization ◽  
Forest Type ◽  
Organic Layer ◽  
Pedunculate Oak ◽  
Gross Nitrification ◽  
N Transformations ◽  
Soil C ◽  
Gross N Mineralization

Abstract. The effects of five different tree species common in the temperate zone, i.e. beech (Fagus sylvatica L.), pedunculate oak (Quercus robur L.), Norway spruce (Picea abies [L.] Karst), Japanese larch (Larix leptolepis [Sichold and Zucc.] Gordon) and mountain pine (Pinus mugo Turra), on soil respiration, gross N mineralization and gross nitrification rates were investigated. Soils were sampled in spring and summer 2002 at a forest trial in Western Jutland, Denmark, where pure stands of the five tree species of the same age were growing on the same soil. Soil respiration, gross rates of N mineralization and nitrification were significantly higher in the organic layers than in the Ah horizons for all tree species and both sampling dates. In summer (July), the highest rates of soil respiration, gross N mineralization and gross nitrification were found in the organic layer under spruce, followed by beech > larch > oak > pine. In spring (April), these rates were also higher under spruce compared to the other tree species, but were significantly lower than in summer. For the Ah horizons no clear seasonal trend was observed for any of the processes examined. A linear relationship between soil respiration and gross N mineralization (r2=0.77), gross N mineralization and gross nitrification rates (r2=0.72), and between soil respiration and gross nitrification (r2=0.81) was found. The results obtained underline the importance of considering the effect of forest type on soil C and N transformations.

Diurnal and seasonal dynamics of soil respiration at temperate Leymus chinensis meadow steppes in western Songnen Plain, China

2014 ◽  
Vol 24 (3) ◽  
pp. 287-296 ◽  
Author(s):  
Ming Wang ◽  
Xingtu Liu ◽  
Jitao Zhang ◽  
Xiujun Li ◽  
Guodong Wang ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Seasonal Dynamics ◽  
Leymus Chinensis ◽  
Songnen Plain

Seasonal dynamics of soil respiration and gross nitrification rate of different subalpine forests in western Sichuan

2019 ◽  
Vol 39 (2) ◽  
Author(s):  
刘顺 LIU Shun ◽  
杨洪国 YANG Hongguo ◽  
罗达 LUO Da ◽  
史作民 SHI Zuomin ◽  
刘千里 LIU Qianli ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Seasonal Dynamics ◽  
Nitrification Rate ◽  
Gross Nitrification ◽  
Subalpine Forests ◽  
Western Sichuan

scholarly journals Implications of the Thermodynamic Response of Soil Mineralization, Respiration, and Nitrification on Soil Organic Matter Retention

2021 ◽  
Vol 12 ◽  
Author(s):  
Anne E. Taylor ◽  
Camille Ottoman ◽  
Frank Chaplen
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Respiration ◽  
N Mineralization ◽  
Time Course ◽  
Net N Mineralization ◽  
Willamette Valley ◽  
Temperature Regimes ◽  
Pool Model ◽  
The Difference

Considerable research has shown that modifications in global temperature regimes can lead to changes in the interactions between soil respiration and the sequestration of C and N into soil organic matter (SOM). We hypothesized that despite the interconnected nature of respiration, net N mineralization, and nitrification processes, there would be differences in their thermodynamic responses that would affect the composition of inorganic soil N and the potential for retention of N in SOM. To test this hypothesis, soil respiration, N mineralization and nitrification responses were evaluated during constant temperature incubations at seven temperatures (4–42°C) in tilled and no-till soils from two major agroecological zones in Oregon; Willamette Valley, and Pendleton located in the Columbia River Basin. We observed (1) significant thermodynamic differences between the three processes in all soils, (2) a distinctly different thermodynamic profile in Willamette vs. Pendleton, and (3) a dynamic response of Topt (optimal temperature for activity), and Tsmax (temperature of greatest rate response to temperature), and temperature sensitivity (ΔCp‡) over the incubation time course, resulting in shifts in the thermodynamic profiles that could not be adequately explained by changes in process rates. We found that differences in contributions of ammonia oxidizing archaea and bacteria to nitrification activity across temperature helped to explain the thermodynamic differences of this process between Willamette and Pendleton soils. A two-pool model of SOM utilization demonstrated that the dynamic thermodynamic response of respiration in the soils was due to shifts in utilization of labile and less-labile pools of C; and that the respiration response by Pendleton soils was more dependent upon contributions from the less-labile C pool resulting in higher Topt and Tsmax than Willamette soils. Interestingly, modeling of N mineralization using the two-pool model suggested that only the less-labile pool of SOM was contributing to N mineralization at most temperatures in all soils. The difference in labile and less-labile SOM pool utilization between respiration and N mineralization may suggest that these processes may not be as interconnected as previously thought.

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