Effect of fertilization on respiration from different sources in a sandy soil of an agricultural long-term experiment

Heitkamp, Felix; Jäger, Nadine; Flessa, Heinz; Raupp, Joachim; Ludwig, Bernard

doi:10.1080/03650340.2011.555762

Cited by 5 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Respiration rates after harvest were within the range of previously reported R s from sandy soil (0.5 µmol C m −2 s −1 ) (Heitkamp et al, 2012) and silty clay loam (1-11 µmol C m −2 s −1 ) (Moyano et al, 2007). The relatively high post-harvest R s and its rapid decline are in accordance with the high root biomass in mesocosms combined with a fast depletion of labile C from sandy soil (Heitkamp et al, 2012).…”

Section: Soil Respiration: Gaseous Co 2 Effluxsupporting

confidence: 85%

Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms

et al. 2014

View full text Add to dashboard Cite

Abstract. The efflux of carbon dioxide (CO2) from soils influences atmospheric CO2 concentrations and thereby climate change. The partitioning of inorganic carbon (C) fluxes in the vadose zone between emission to the atmosphere and to the groundwater was investigated to reveal controlling underlying mechanisms. Carbon dioxide partial pressure in the soil gas (pCO2), alkalinity, soil moisture and temperature were measured over depth and time in unplanted and planted (barley) mesocosms. The dissolved inorganic carbon (DIC) percolation flux was calculated from the pCO2, alkalinity and the water flux at the mesocosm bottom. Carbon dioxide exchange between the soil surface and the atmosphere was measured at regular intervals. The soil diffusivity was determined from soil radon-222 (222Rn) emanation rates and soil air Rn concentration profiles and was used in conjunction with measured pCO2 gradients to calculate the soil CO2 production. Carbon dioxide fluxes were modeled using the HP1 module of the Hydrus 1-D software. The average CO2 effluxes to the atmosphere from unplanted and planted mesocosm ecosystems during 78 days of experiment were 0.1 ± 0.07 and 4.9 ± 0.07 μmol C m−2 s−1, respectively, and grossly exceeded the corresponding DIC percolation fluxes of 0.01 ± 0.004 and 0.06 ± 0.03 μmol C m−2 s−1. Plant biomass was high in the mesocosms as compared to a standard field situation. Post-harvest soil respiration (Rs) was only 10% of the Rs during plant growth, while the post-harvest DIC percolation flux was more than one-third of the flux during growth. The Rs was controlled by production and diffusivity of CO2 in the soil. The DIC percolation flux was largely controlled by the pCO2 and the drainage flux due to low solution pH. Modeling suggested that increasing soil alkalinity during plant growth was due to nutrient buffering during root nitrate uptake.

show abstract

Section: Soil Respiration: Gaseous Co 2 Effluxsupporting

confidence: 85%

Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The contribution of organic carbon (C) sources to total annual C additions (Mg C ha ‐1 ) starting from 1984. The C input by manure, slurry, straw, and crop roots (stubbles) was measured and calculated (see detail Heitkamp et al, ). N0, N2, and N4 represent no, medium, and high N fertilization, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The soil was classified as Luvisol (Parabraunerden; IUSS‐WRB, 2015), derived from loess sediments with silt‐loam texture (sand: 9%, silt: 73%, clay: 18%) overlying moraine deposits of the Riss glaciation. The mean annual precipitation and temperature since 1983 were 868 mm y ‐1 and 8·4°C, respectively (Heitkamp et al, ). Prior to the experiment, the site was used as cropland for decades or even centuries, and we, therefore, assume no major disequilibrium of C contents due to land use changes.…”

Section: Methodsmentioning

confidence: 99%

“…Overall, mean annual C input for all organic additions ranged from 1·17 to 4·86 Mg C ha -1 y -1 and increased with N fertilization rate ( Figure 2). For detailed information about the experiment (i.e., C input estimation and calculations, crop yields, N balances), see Hege & Offenberger (2006) and Heitkamp et al (2012a).…”

Section: Experimental Designmentioning

confidence: 99%

“…Generally, it is assumed that increasing amounts of C inputs to soil improve SOM levels. Several field studies, however, show that increasing C inputs did not always increase SOM levels (Heitkamp et al, ; Novara et al, ; Stewart et al, ). Such phenomena of SOM change are often linked with C storage capacity of various SOM fractions (Six et al, ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Decadal Nitrogen Fertilization Decreases Mineral‐Associated and Subsoil Carbon: A 32‐Year Study

et al. 2017

Self Cite

View full text Add to dashboard Cite

Crop residues and manure are important sources of carbon (C) for soil organic matter (SOM) formation. Crop residue return increases by nitrogen (N) fertilization because of higher plant productivity, but this often results only in minor increases of SOM. In our study, we show how N fertilization and organic C additions affected SOM and its fractions within a 32‐year‐long field‐experiment at Puch, Germany. Five organic additions, no‐addition (control), manure, slurry, straw and straw + slurry, were combined with three mineral N fertilization rates (no, medium and high fertilization), which resulted in 1·17–4·86 Mg C‐input ha‐1 y‐1. Topsoil (0–25 cm) SOM content increased with N fertilization, mainly because of the C in free light fraction (f‐LF). In contrast, subsoil (25–60 cm) SOM decreased with N fertilization, probably because of roots' relocation in Ap horizon with N fertilization at the surface. Despite high inputs, straw contributed little to f‐LF but prevented C losses from the mineral‐associated SOM fraction (ρ > 1·6 g cm‐3) with N fertilization, which was observed without straw addition. Above (straw) and belowground (roots) residues had opposite effects on SOM fractions. Root C retained longer in the light‐fractions and was responsible for SOM increase with N fertilization. Straw decomposed rapidly (from f‐LF) and fueled the mineral‐associated SOM fraction. We conclude that SOM content and composition depended not only on residue quantity, which can be managed by the additions and N fertilization, but also on the quality of organics. This should be considered for maintaining the SOM level, C sequestration, and soil fertility. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Processes of Soil Carbon Dynamics and Ecosystem Carbon Cycling in a Changing World

Heitkamp

Jacobs

Jungkunst³

et al. 2012

Recarbonization of the Biosphere

View full text Add to dashboard Cite

Effect of fertilization on respiration from different sources in a sandy soil of an agricultural long-term experiment

Cited by 5 publications

References 23 publications

Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms

Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms

Decadal Nitrogen Fertilization Decreases Mineral‐Associated and Subsoil Carbon: A 32‐Year Study

Processes of Soil Carbon Dynamics and Ecosystem Carbon Cycling in a Changing World

Contact Info

Product

Resources

About