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  • 1
    Electronic Resource
    Electronic Resource
    Methane oxidation in arable soil as inhibited by ammonium, nitrite, and organic manure with respect to soil pH (1998)
    Springer
    Biology and fertility of soils 28 (1998), S. 27-35 
    Details
    ISSN: 1432-0789
    Keywords: Key words Methane oxidation ; Ammonium ; Soil pH ; Nitrite ; Organic manure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The effects of inorganic N and organic manure, applied to a loamy arable soil, on CH4 oxidation were investigated in laboratory incubation experiments. Applications (40 mg N kg–1) of NH4Cl, (NH4)2SO4, and urea caused strong instantaneous inhibition of CH4 oxidation by 96%, 80%, and 84%, respectively. After nitrification of the added N the inhibitory effect was not fully reversible, resulting in an residual inhibition of 21%, 16%, and 25% in the NH4Cl, (NH4)2SO4, and urea treatments, respectively. With large NH4 + applications [240 mg N kg–1 as (NH4)2SO4] the residual inhibition was as high as 64%. Exogenous NO2 – (40 mg NO2 –-N kg–1) initially inhibited CH4 oxidation by 84%, decreasing to 41% after its oxidation. Therefore, applied NO2 – was a more effective inhibitor of CH4 consumption than NH4 +. Temporary accumulation of NO2 – during nitrification of added N was small (maximum: 1.9 mg NO2 –-N kg–1) and thus of minor importance with respect to the persistent inhibition after NH4 + or urea application. CH4 oxidation after NaNO3 (40 mg N kg–1) and NaCl addition did not differ to that of the untreated soil. The effect of organic manures on CH4 oxidation depended on their C/N ratio: fresh sugar beet leaves enhanced mineralization, which caused an instantaneous 20% inhibition, whereas after wheat straw application available soil N was rapidly immobilized and no effect on CH4 oxidation was found. The 28% increase in CH4 oxidation after biowaste compost application was not related to its C/N ratio and was probably the result of an inoculation with methanotrophic bacteria. Only with high NH4 + application rates (240 mg N kg–1) could the persistent inhibitory effect partly be attributed to a pH decrease during nitrification. The exact reason for the observed persistent inhibition after a single, moderate NH4 + or urea application is still unknown and merits further study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050459
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    CH4 oxidation in two temperate arable soils as affected by nitrate and ammonium application (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 86-92 
    Details
    ISSN: 1432-0789
    Keywords: CH4 oxidation ; Arable soils ; Nitrogen application ; Soil structure ; Model experiments ; N transformations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The short-term effect of NaNO3 or (NH4)2SO4 application on CH4 oxidation was measured under laboratory conditions with sieved soils collected from the top layer (0–12 cm) of a loamy and a sandy soil. The soils were incubated in sealed flasks and the CH4 and CO2 concentrations in headspace were measured periodically. On each gas sampling date the soils were analysed for inorganic N, electro-ultrafiltration organic N, and pH. NH 4 + application to the loamy soil inhibited CH4 oxidation entirely whereas in the untreated control soils CH4 concentration decreased linearly with a rate of-41 nl CH4 l-1 h-1; NO 3 sup- application to this soil caused a small but significant reduction in CH4 uptake. The CH4-oxidizing ability of the sandy soil was low, even in the control. This was mainly a result of the disturbed soil structure after sieving. Both NH 4 + and NO 3 sup- treatments completely inhibited CH4 uptake in this ligh-textured soil. The adverse impact of NH 4 + persisted during the entire incubation, although in the loamy soil only 17% of the NH 4 + added was recovered after 168 h. The negative effect of NO 3 sup- was probably caused by an increase in osmotic potential. Immediate inhibition of CH4 oxidation after inorganic N addition was demonstrated in two arable soils, although the effect was directly related only in part to soil N transformations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335823
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Tillage and land use effects on methane oxidation rates and their vertical profiles in soil (1998)
    Springer
    Biology and fertility of soils 27 (1998), S. 284-292 
    Details
    ISSN: 1432-0789
    Keywords: Key words Methane oxidation ; Land use ; Soil tillage ; Set-aside ; Depth distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The effect of land use and different soil tillage systems on CH4 oxidation was tested in a laboratory incubation study. Intact soil cores were collected from the topsoil (0–12 cm) of a field site with ploughed, direct-drilled and set-aside treatments, and from an adjacent undisturbed forest site. CH4 oxidation rates were 4.5 to 11 times higher in the direct-drilled than in the continuously ploughed treatment, in the set-aside soil they were intermediate. The oxidation rates in the forest soil were 11 times the highest rate measured at the field site, pointing to a distinct land use effect. Vertical profiles of CH4 oxidation activity revealed a very clear zonation in all treatments. CH4 oxidation increased significantly below the plough layer (0–25 cm), and showed a subsurface maximum under direct-drilling (5–15 cm) and under forest (5–10 cm). The vertical zonation under set-aside was comparable to that under ploughing. Generally, the maximum CH4 oxidizing activity was in the zone nearest to the soil surface, unless various constraints prevented this.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050435
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    CH4 oxidation in two temperate arable soils as affected by nitrate and ammonium application (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 86-92 
    Details
    ISSN: 1432-0789
    Keywords: Key words CH4 oxidation ; Arable soils ; Nitrogen application ; Soil structure ; Model experiments ; N transformations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The short-term effect of NaNO3 or (NH4)2SO4 application on CH4 oxidation was measured under laboratory conditions with sieved soils collected from the top layer (0–12 cm) of a loamy and a sandy soil. The soils were incubated in sealed flasks and the CH4 and CO2 concentrations in headspace were measured periodically. On each gas sampling date the soils were analysed for inorganic N, electro-ultrafiltration organic N, and pH. NH4 + application to the loamy soil inhibited CH4 oxidation entirely whereas in the untreated control soils CH4 concentration decreased linearly with a rate of –41 nl CH4 l–1 h–1; NO3 – application to this soil caused a small but significant reduction in CH4 uptake. The CH4-oxidizing ability of the sandy soil was low, even in the control. This was mainly a result of the disturbed soil structure after sieving. Both NH4 + and NO3 – treatments completely inhibited CH4 uptake in this light-textured soil. The adverse impact of NH4 + persisted during the entire incubation, although in the loamy soil only 17% of the NH4 + added was recovered after 168 h. The negative effect of NO3 – was probably caused by an increase in osmotic potential. Immediate inhibition of CH4 oxidation after inorganic N addition was demonstrated in two arable soils, although the effect was directly related only in part to soil N transformations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335823
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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