N fertilization affects on soil respiration, microbial biomass and root respiration in Larix gmelinii and Fraxinus mandshurica plantations in China

2010 ◽  
Vol 333 (1-2) ◽  
pp. 325-336 ◽  
Author(s):  
Shuxia Jia ◽  
Zhengquan Wang ◽  
Xingpeng Li ◽  
Yue Sun ◽  
Xiaoping Zhang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Respiration ◽  
Root Respiration ◽  
N Fertilization ◽  
Larix Gmelinii ◽  
Fraxinus Mandshurica

scholarly journals EFFECT OF NITROGEN FERTILIZATION ON SOIL RESPIRATION IN LARIX GMELINII AND FRAXINUS MANDSHURICA PLANTATIONS IN CHINA

2007 ◽  
Vol 31 (3) ◽  
pp. 372-379 ◽  
Author(s):  
JIA Shu-Xia ◽  
◽  
WANG Zheng-Quan ◽  
MEI Li ◽  
SUN Yue ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Nitrogen Fertilization ◽  
Larix Gmelinii ◽  
Fraxinus Mandshurica

scholarly journals Relationships between root respiration rate and root morphology, chemistry and anatomy in Larix gmelinii and Fraxinus mandshurica

2013 ◽  
Vol 33 (6) ◽  
pp. 579-589 ◽  
Author(s):  
S. Jia ◽  
N. B. McLaughlin ◽  
J. Gu ◽  
X. Li ◽  
Z. Wang
Keyword(s):  
Respiration Rate ◽  
Root Morphology ◽  
Root Respiration ◽  
Larix Gmelinii ◽  
Fraxinus Mandshurica

Microbial biomass and activity in the humus layer following burning: short-term effects of two different fires

1993 ◽  
Vol 23 (7) ◽  
pp. 1275-1285 ◽  
Author(s):  
Janna Pietikäinen ◽  
Hannu Fritze
Keyword(s):  
Microbial Community ◽  
Microbial Biomass ◽  
Soil Respiration ◽  
Mass Loss ◽  
Forest Fire ◽  
Prescribed Burning ◽  
Microbial Biomass C ◽  
Soil Microbial ◽  
Fungal Hyphae ◽  
C And N

During a 3-year study, soil microbial biomass C and N, length of the fungal hyphae, soil respiration, and the percent mass loss of needle litter were recorded in coniferous forest soil humus layers following a prescribed burning (PB) treatment or a forest fire simulation (FF) treatment (five plots per treatment). Unburned humus from adjacent plots served as controls (PC and FC, respectively). Prescribed burning was more intensive than the forest fire, and this was reflected in all the measurements taken. The amounts of microbial biomass C and N, length of fungal hyphae, and soil respiration in the PB area did not recover to their controls levels, whereas unchanged microbial biomass N and recovery of the length of the fungal hyphae to control levels were observed in the FF area. The mean microbial C/N ratio was approximately 7 in all the areas, which reflected the C/N ratio of the soil microbial community. Deviation from this mean value, as observed during the first three samplings from the PB area (3, 18, and 35 days after fire treatment), suggested a change in the composition of the microbial community. Of the two treated areas, the decrease in soil respiration (laboratory measurements) was much more pronounced in the PB area. However, when the humus samples from both areas were adjusted to 60% water holding capacity, no differences in respiration capacity were observed. The drier humus, due to higher soil temperatures, of the PB area is a likely explanation for the low soil respiration. Lower soil respiration was not reflected in lower litter decomposition rates of the PB area, since there was a significantly higher needle litter mass loss during the first year in the PB area followed by a decline to the control level during the second year. Consistently higher mass losses were recorded in the FC area than in the FF area.

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.

Soil and root respiration in mature Alaskan black spruce forests that vary in soil organic matter decomposition rates

2005 ◽  
Vol 35 (1) ◽  
pp. 161-174 ◽  
Author(s):  
Jason G Vogel ◽  
David W Valentine ◽  
Roger W Ruess
Keyword(s):  
Soil Respiration ◽  
Root Respiration ◽  
Forest Type ◽  
Black Spruce ◽  
Decomposition Rates ◽  
Spruce Forests ◽  
Moisture Deficit ◽  
Soil Temperatures ◽  
Boreal Ecosystem ◽  
Site Identification

Climate warming at high latitudes is expected to increase root and microbial respiration and thus cause an increase in soil respiration. We measured the root and microbial components of soil respiration near Fairbanks, Alaska, in 2000 and 2001, in three black spruce (Picea mariana (Mill) B.S.P.) forests. We hypothesized faster decomposition correlates with greater amounts of both root and microbial contributions to soil respiration. Contrary to our prediction, the site with the coolest summer soil temperatures and slowest decomposition (site identification "high-np") had significantly (p < 0.05) greater growing season soil respiration (485 g C·m–2·year–1) than the two other sites (372 and 332 g C·m–2·year–1). Spruce C allocation to root respiration was significantly greater, and fine-root N concentration was 10% and 12% greater (p < 0.05) at high-np than at the other two sites. High-np spruce foliage was also more enriched in 13C and depleted in 15N, suggesting either lower available moisture or slower N turnover. Either factor could drive greater C allocation to roots; however, a literature review suggests moisture deficit corresponds to greater C allocation to roots in black spruce forests across the boreal ecosystem. Controls on spruce C allocation need to be resolved before making the generalization that soil respiration will increase with warming in this forest type.

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