Influence of mechanical loading on static and dynamic CO2 efflux on differently textured and managed Luvisols

Mordhorst, Anneka; Peth, Stephan; Horn, Rainer

doi:10.1016/j.geoderma.2013.12.020

Cited by 23 publications

(19 citation statements)

References 76 publications

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“…Similar results reported by Mordhorst et al [4] indicated that soil compaction directly resulted in the lower CO 2 efflux from compacted soils. In terms of tillage practices, NT and RT led to significant soil CO 2 efflux decrement before 26 days (p<0.05); however, MP did not show the obvious variation trend (Figs 2-3).…”

Section: Resultssupporting

confidence: 88%

“…Hence, no significant effects on soil CO 2 efflux were observed for large macro-, meso-, and micropores. On the other hand, tillage practices through differences in mechanical disturbances altered physical changes in pore systems, which controled CO 2 efflux by changes in gas transport properties [4]. In other Values followed by the same letter within a column at the same level of bulk density before and after incubation indicate no significant difference at the 0.05 level.…”

Section: Relationship Between Soil Co 2 Efflux and Pore Size Distribumentioning

confidence: 99%

“…Soil compaction increases bulk density, decreases porosity, and restricts fluid and gas transport processes, thereby affecting CO 2 efflux [3]. Although some field studies have evaluated the effects of soil compaction on CO 2 efflux [4][5], most of these studies are restricted to the analysis of a qualitative relationship between soil bulk density or total porosity and CO 2 efflux. The critical value of soil bulk density and the volume of which pore size affects CO 2 efflux changes remain unexplored.…”

Section: Introductionmentioning

confidence: 99%

“…As a key element in conservation agriculture, conservation tillage was shown to have lower soil CO 2 efflux than conventional tillage in some studies, but it also may lead to excessive soil compaction [9]. Tillage-induced changes in compaction affect the ability of soil to fulfil essential soil functions in relation to soil respiration [4]. However, the effect of soil compaction caused by tillage practices on CO 2 efflux is as yet largely unknown.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Chen¹,

Yang²,

Liang³

et al. 2016

Pol. J. Environ. Stud.

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Limited information is available for how soil compaction affects carbon dioxide (CO 2 ) efflux under different tillage systems. To improve understanding of the effects of compaction and tillage on soil CO 2 efflux, an incubation study consisting of no tillage (NT), moldboard plow (MP), and ridge tillage (RT) was conducted to explore the relationships between CO 2 efflux and bulk density, as well as pore size distribution under different levels of bulk densities, and the thresholds of bulk density and the volume of pore size above which CO 2 efflux were affected in northeast China. Results showed that there was a significantly negative correlation (r = -0.990, p<0.05; r = -0.986, p<0.05; and r = -0.992, p<0.01, respectively, for NT, MP, and RT) between CO 2 efflux and bulk density, whereas the correlation was significantly positive (r ranges from 0.75 to 0.85, p<0.05 for each tillage practice under bulk densities of 1.0-1.6 g/cm 3 ) for the volume of small macropores (30-100 µm). The critical value of bulk density for impeding CO 2 efflux was more produced in 1.6 g/cm 3 and the volume of small macropores affected CO 2 efflux variation greatly. Ridge tillage is a better tillage practice for impeding soil CO 2 efflux than no tillage, as evidenced by the lesser volume of small macropores.

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Section: Resultssupporting

confidence: 88%

Section: Relationship Between Soil Co 2 Efflux and Pore Size Distribumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Chen¹,

Yang²,

Liang³

et al. 2016

Pol. J. Environ. Stud.

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show abstract

“…As a consequence of the altered water saturation and pore size distribution including pore connectivity we can also find altered CO 2 emissions which can be explained in combination with the biological activity. Two counteracting factors need to be considered (for a schematic overview see Mordhorst et al, 2014): -a reduction of air-filled pores causes a reduction of air conductivity and therefore oxygen supply might be restricted. This results in a reduced biological activity, since oxygen supply is a limiting factor for biological activity.…”

Section: Last Column)mentioning

confidence: 99%

Elastic and plastic soil deformation and its influence on emission of greenhouse gases

Haas¹,

Holthusen²,

Mordhorst³

et al. 2016

International Agrophysics

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Soil management alters physical, chemical and biological soil properties. Stress application affects microbiological activity and habitats for microorganisms in the root zone and causes soil degradation. We hypothesized that stress application results in altered greenhouse gas emissions if soil strength is exceeded. In the experiments, soil management dependent greenhouse gas emissions of intact soil cores (no, reduced, conventional tillages) were determined using two experimental setups; CO2 emissions were determined with: a dynamic measurement system, and a static chamber method before and after a vertical soil stress had been applied. For the latter CH4 and N2O emissions were analyzed additionally. Stress dependent effects can be summed as follows: In the elastic deformation range microbiological activity increased in conventional tillage soil and decreased in reduced tillage and no tillage. Beyond the precompression stress a release of formerly protected soil organic carbon and an almost total loss of CH4 oxidizability occurred. Only swelling and shrinkage of no tillage and reduced tillage regenerated their microhabitat function. Thus, the direct link between soil strength and microbial activity can be applied as a marker for soil rigidity and the transition to new disequilibria concerning microbial activity and composition.

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Soils in Agricultural Engineering

Horn

2021

Hydrogeology, Chemical Weathering, and Soil Formation

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Influence of mechanical loading on static and dynamic CO2 efflux on differently textured and managed Luvisols

Cited by 23 publications

References 76 publications

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Elastic and plastic soil deformation and its influence on emission of greenhouse gases

Soils in Agricultural Engineering

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