Plants control the seasonal dynamics of microbial N cycling in a beech forest soil by belowground C allocation

Ecology ◽  
2011 ◽  
Vol 92 (5) ◽  
pp. 1036-1051 ◽  
Author(s):  
Christina Kaiser ◽  
Lucia Fuchslueger ◽  
Marianne Koranda ◽  
Markus Gorfer ◽  
Claus F. Stange ◽  
...  
Keyword(s):  
Forest Soil ◽  
Seasonal Dynamics ◽  
Beech Forest ◽  
N Cycling ◽  
Microbial N

scholarly journals Co-application of a biosolids product and biochar to two coarse-textured pasture soils influenced microbial N cycling genes and potential for N leaching

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sanjutha Shanmugam ◽  
Sasha N. Jenkins ◽  
Bede S. Mickan ◽  
Noraini Md Jaafar ◽  
Falko Mathes ◽  
...  
Keyword(s):  
Soil Ph ◽  
Clayey Soil ◽  
Chemical Properties ◽  
Subterranean Clover ◽  
N Cycling ◽  
Shoot Biomass ◽  
N Leaching ◽  
Physical And Chemical ◽  
Microbial N ◽  
And Chemical Properties

AbstractCo-application of biochar and biosolids to soil has potential to mitigate N leaching due to physical and chemical properties of biochar. Changes in N cycling pathways in soil induced by co-application of biological amendments could further mitigate N loss, but this is largely unexplored. The aim of this study was to determine whether co-application of a biochar and a modified biosolids product to three pasture soils differing in texture could alter the relative abundance of N cycling genes in soil sown with subterranean clover. The biosolids product contained lime and clay and increased subterranean clover shoot biomass in parallel with increases in soil pH and soil nitrate. Its co-application with biochar similarly increased plant growth and soil pH with a marked reduction in nitrate in two coarse textured soils but not in a clayey soil. While application of the biosolids product altered in silico predicted N cycling functional genes, there was no additional change when applied to soil in combination with biochar. This supports the conclusion that co-application of the biochar and biosolids product used here has potential to mitigate loss of N in coarse textured soils due to N adsoption by the biochar and independently of microbial N pathways.

Easily mineralizable carbon in manure-based biochar added to a soil influences N2 O emissions and microbial-N cycling genes

2018 ◽  
Vol 30 (4) ◽  
pp. 406-416 ◽  
Author(s):  
Zhongmin Dai ◽  
Yong Li ◽  
Xiaojie Zhang ◽  
Jianjun Wu ◽  
Yu Luo ◽  
...  
Keyword(s):  
N Cycling ◽  
Mineralizable Carbon ◽  
Microbial N

Microbial N turnover processes in three forest soil layers following clear cutting of an N saturated mature spruce stand

2010 ◽  
Vol 337 (1-2) ◽  
pp. 93-110 ◽  
Author(s):  
B. Matejek ◽  
C. Huber ◽  
M. Dannenmann ◽  
M. Kohlpaintner ◽  
R. Gasche ◽  
...  
Keyword(s):  
Forest Soil ◽  
Soil Layers ◽  
Clear Cutting ◽  
N Turnover ◽  
Microbial N

scholarly journals Controls over N<sub>2</sub>O, NO<sub>x</sub> and CO<sub>2</sub> fluxes in a calcareous mountain forest soil

2005 ◽  
Vol 2 (5) ◽  
pp. 1423-1455 ◽  
Author(s):  
B. Kitzler ◽  
S. Zechmeister-Boltenstern ◽  
C. Holtermann ◽  
U. Skiba ◽  
K. Butterbach-Bahl
Keyword(s):  
Forest Soil ◽  
Co2 Emissions ◽  
Temporal Variations ◽  
Beech Forest ◽  
N Deposition ◽  
Measuring System ◽  
Mountain Forest ◽  
N2o Emissions ◽  
Minor Importance ◽  
Forest Site

Abstract. We measured nitrogen oxides (N2O and NOx), dinitrogen (N2) and carbon dioxide (CO2) emissions from a spruce-fir-beech forest soil in the North Tyrolean limestone Alps in Austria. The site received 12.1 kg nitrogen via wet and dry deposition. Fluxes of nitric oxide (NO) were measured by an automatic dynamic chamber system on an hourly basis over a two year period. Daily N2O emissions were obtained by a semi-automatic gas measuring system. In order to cover spatial variability biweekly manual measurements of N2O and CO2 emissions were carried out, additionally. For acquiring information on the effects of soil and meteorological conditions and of N-deposition on N-emissions we chose the autoregression procedure (time-series analysis) as our means of investigation. Hence, we could exclude the data's autocorrelation in the course of the time. We found that soil temperature, soil moisture and wet N-deposition followed by air temperature and precipitation were the most powerful influencing parameters effecting N-emissions. With these variables up to 89% of observed temporal variations of N-emissions could be explained. During the two-year investigation period between 2.5 and 3.5% of deposited N was reemitted in form of N2O whereas only 0.2% were emitted as NO. At our mountain forest site the main end-product of microbial activity processes was N2 and trace gases (N2O and NO) were only of minor importance.

scholarly journals Entomopathogenic fungi isolated in the vicinity of Szczecin

2014 ◽  
Vol 33 (1) ◽  
pp. 123-130 ◽  
Author(s):  
Ryszard Miętkiewicz ◽  
Magdalena Dzięgielewska ◽  
Krystyna Janowicz
Keyword(s):  
Forest Soil ◽  
Beauveria Bassiana ◽  
Entomopathogenic Fungi ◽  
Metarhizium Anisopliae ◽  
Entomopathogenic Fungus ◽  
Dominant Species ◽  
Beech Forest ◽  
Meadow Soil ◽  
Paecilomyces Farinosus ◽  
Opposite Tendency

The spectrum and occurrence of entomopathogenic fungi in litter beech forest. meadow soil and arable soil were evaluated using an "insect bait method". Soil and litter samples taken in autumn and spring from each stand were baited with <i>G. mellonella</i> larvae at 22°C. Six species of entomopathogenic fungi infected these larvae. In the litter <i>Beauveria bassiana</i> was the dominant species. Besides <i>B. bassiana</i>, 23% of <i>G. mellonella</i> larvae were infected by <i>Paecilomyces farinosus</i> in autumn. In the forest soil the dominant entomopathogenic fungus was not found. In this stand the number of infected larvae was the lowest. <i>Metarhizium anisopliae</i> was the dominant species in the meadow soil in both sampling periods. In the soil taken from a rye field<i> P. fumosoroseus</i> and <i>B. bassiana</i> infected <i>G. mellonella</i> larvae almost to the same degree. It was established that <i>B. bassiana</i> and <i>M. anisopliae</i> infected more <i>G. mellonella</i> larvae in spring than in autumn. In the case of <i>P. farinosus</i> and <i>P. fumosoroseus</i> an opposite tendency was observed.

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