Influence of plant growth on denitrification in relation to soil moisture and potassium nutrition

Rheinbaben, W. Von; Trolldenier, G.

doi:10.1002/jpln.19841470610

Cited by 28 publications

(20 citation statements)

References 8 publications

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“…Soil samples were taken from the upper 5 cm, where the greatest part of the applied SDZ is expected to be retained, as previously shown by Unold et al (2010). Sampling was carried out before and immediately after manure application, at the end of each cycle of dryness and 2, 7 and 21 days after rewetting from 4 independent pots per time point and treatment (CO-W, S4-W, CO-D, S4-D).…”

Section: Experimental Designmentioning

confidence: 99%

Drying and rewetting events change the response pattern of nitrifiers but not of denitrifiers to the application of manure containing antibiotic in soil

Radl

Kindler

Welzl

et al. 2015

Applied Soil Ecology

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A B S T R A C TApplication of manure for soil fertilization is a common practice in arable and pasture soils. As antibiotics are regularly used in animal husbandry, these compounds often enter the soil via manure application. The effects of antibiotics on microbial communities, however, might depend on soil moisture, as water availability may influence both the fate of the compound and the activity of the microbes. To test this hypothesis, we investigated the effects of the application of manure containing the antibiotic sulfadiazine (SDZ) on the abundance and activity of nitrifies and denitrifies in soil, based on the copy number of marker genes and their related potential activities, as affected by different moisture regimes. We observed significant effects of SDZ on potential denitrification activity, but those were not influenced by the soil moisture regime. Nevertheless, neither SDZ nor changes on moisture significantly affected the abundance of denitrifies. In contrast, both potential nitrification activity and abundance of ammonia oxidizing bacteria were significantly affected by the application of manure containing SDZ and moisture regime. Interestingly, no effects were observed for ammonia oxidizing archaea. Overall, our data show that soil moisture modulates the effects of antibiotics in soil microbial communities, and we recommend to include this parameter in the risk assessment of new chemicals.

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Section: Experimental Designmentioning

confidence: 99%

Drying and rewetting events change the response pattern of nitrifiers but not of denitrifiers to the application of manure containing antibiotic in soil

Radl

Kindler

Welzl

et al. 2015

Applied Soil Ecology

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“…The pronounced root penetration in the developed soils brings along an enhanced water retention potential resulting in less oxygen diffusion and reduced partial oxygen pressure (Rheinbaben and Trolldenier, 1984;Deiglmayr et al, 2006). In combination with the sevenfold increase of the nitrate concentrations, developed soils (120 and 2000a) provide good conditions for denitrification.…”

Section: Plants As Competitors For Nutrientsmentioning

confidence: 99%

Abundances and potential activities of nitrogen cycling microbial communities along a chronosequence of a glacier forefield

et al. 2010

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Glacier forefields are ideal ecosystems to study the development of nutrient cycles as well as single turnover processes during soil development. In this study, we examined the ecology of the microbial nitrogen (N) cycle in bulk soil samples from a chronosequence of the Damma glacier, Switzerland. Major processes of the N cycle were reconstructed on the genetic as well as the potential enzyme activity level at sites of the chronosequence that have been ice-free for 10, 50, 70, 120 and 2000 years. In our study, we focused on N fixation, mineralization (chitinolysis and proteolysis), nitrification and denitrification. Our results suggest that mineralization, mainly the decomposition of deposited organic material, was the main driver for N turnover in initial soils, that is, ice-free for 10 years. Transient soils being ice-free for 50 and 70 years were characterized by a high abundance of N fixing microorganisms. In developed soils, ice-free for 120 and 2000 years, significant rates of nitrification and denitrification were measured. Surprisingly, copy numbers of the respective functional genes encoding the corresponding enzymes were already high in the initial phase of soil development. This clearly indicates that the genetic potential is not the driver for certain functional traits in the initial phase of soil formation but rather a well-balanced expression of the respective genes coding for selected functions.

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“…Soil conditions for denitrification have frequently been studied with the main prerequisites being availability of nitrate (NO 3 − ) and easily decomposable organic substances, and oxygen deficiency (Burford and Bremner 1975;Firestone et al 1979). Growing plants modify all these parameters, particularly the availability of the main substrates (NO 3 − and C org ) and soil moisture, and may thus play an important role in regulating denitrification in situ (von Rheinbaben and Trolldenier 1984). Plant N uptake largely controls concentration and distribution of mineral N in soils.…”

Section: Introductionmentioning

confidence: 99%

Nitrate uptake and carbon exudation – do plant roots stimulate or inhibit denitrification?

et al. 2020

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Background and aims Plant growth affects soil moisture, mineral N and organic C availability in soil, all of which influence denitrification. With increasing plant growth, root exudation may stimulate denitrification, while N uptake restricts nitrate availability. Methods We conducted a double labeling pot experiment with either maize (Zea mays L.) or cup plant (Silphium perfoliatum L.) of the same age but differing in size of their shoot and root systems. The 15N gas flux method was applied to directly quantify N2O and N2 fluxes in situ. To link denitrification with available C in the rhizosphere, 13CO2 pulse labeling was used to trace C translocation from shoots to roots and its release by roots into the soil. Results Plant water and N uptake were the main factors controlling daily N2O + N2 fluxes, cumulative N emissions, and N2O production pathways. Accordingly, pool-derived N2O + N2 emissions were 30–40 times higher in the treatment with highest soil NO3− content and highest soil moisture. CO2 efflux from soil was positively correlated with root dry matter, but we could not detect any relationship between root-derived C and N2O + N2 emissions. Conclusions Root-derived C may stimulate denitrification under small plants, while N and water uptake become the controlling factors with increasing plant and root growth.

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Influence of plant growth on denitrification in relation to soil moisture and potassium nutrition

Cited by 28 publications

References 8 publications

Drying and rewetting events change the response pattern of nitrifiers but not of denitrifiers to the application of manure containing antibiotic in soil

Drying and rewetting events change the response pattern of nitrifiers but not of denitrifiers to the application of manure containing antibiotic in soil

Abundances and potential activities of nitrogen cycling microbial communities along a chronosequence of a glacier forefield

Nitrate uptake and carbon exudation – do plant roots stimulate or inhibit denitrification?

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