Influence of tillage on degradation kinetics using the litterbag method

Jacobs, Anna; Ludwig, Bernard; Schmidt, Jan Henrik; Bergstermann, Anja; Rauber, Rolf; Joergensen, Rainer Georg

doi:10.1016/j.ejsobi.2010.11.011

Cited by 21 publications

(10 citation statements)

References 45 publications

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“…Furthermore, shifts in microbial community structure due to long‐term tillage treatments may also have affected respiration ( e.g. , Frey et al, 1999; Jacobs et al, 2011). However, it is unlikely that these factors could explain the majority of the observed differences in respiration between MP and ST.…”

Section: Resultsmentioning

confidence: 99%

Effects of autumn tillage and residue management on soil respiration in a long‐term field experiment in Sweden

Kainiemi

Arvidsson

Kätterer

2015

J. Plant Nutr. Soil Sci.

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Several previous field studies in temperate regions have shown decreased soil respiration after conventional tillage compared with reduced or no-tillage treatments. Whether this decrease is due to differences in plant residue distribution or changes in soil structure following tillage remains an open question. This study investigated (1) the effects of residue management and incorporation depth on soil respiration and (2) biological activity in different post-tillage aggregates representing the actual size and distribution of aggregates observed in the tilled layer. The study was conducted within a long-term tillage experiment on a clay soil (Eutric Cambisol) in Uppsala, Sweden. After 38 y, four replicate plots in two long-term treatments (moldboard plowing (MP) and shallow tillage (ST)) were split into three subplots. These were then used for a short-term trial in which crop residues were either removed, left on the surface or incorporated to about 6 cm depth (ST) or at 20 cm depth (MP). Soil respiration, soil temperature, and water content were monitored during a 10-d period after tillage treatment. Respiration from aggregates of different sizes produced by ST and MP was also measured at constant water potential and temperature in the laboratory. The results showed that MP decreased short-term soil respiration compared with ST or no tillage. Small aggregates (< 16 mm) were biologically most active, irrespective of tillage method, but due to their low proportion of total soil mass they contributed < 1.5% to total respiration from the tilled layer. Differences in respiration between tillage treatments were found to be attributable to indirect effects on soil moisture and temperature profiles and the depth distribution of crop residues, rather than to physical disturbance of the soil.

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Section: Resultsmentioning

confidence: 99%

Effects of autumn tillage and residue management on soil respiration in a long‐term field experiment in Sweden

Kainiemi

Arvidsson

Kätterer

2015

J. Plant Nutr. Soil Sci.

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“…Litter mass and chemical components were expressed on an organic matter (OM) basis after correction for ash. Ash content was determined by drying 1 g of sample at 105°C and then heating the sample at 550°C for 6 h (Jacobs et al, 2011).…”

Section: Methodsmentioning

confidence: 99%

Litter Deposition and Nitrogen Return in Rotationally Stocked Smooth Bromegrass Pastures

et al. 2014

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Understanding how management systems impact nutrient cycling is important to pasture sustainability. From 2010 to 2011, we investigated how supplementation of beef cattle (Bos taurus) with corn (Zea mays L.) dried distillers grains plus solubles (DDGS) on unfertilized, rotationally stocked smooth bromegrass (Bromus inermis Leyss.) pasture (SUPP) a ected the litter pool, residual herbage mass, litter deposition, and litter quality relative to unsupplemented beef cattle rotationally stocked on unfertilized control (CONT) and N-fertilized (FERT) smooth bromegrass pastures. As hypothesized based on management for greater herbage mass and animal demand during the grazing season, litter deposition was 48% greater in FERT than CONT and SUPP. Management e ects, however, depended on year and rotation. Di erences in the litter pool, residual herbage mass, and litter deposition typically were greatest before and a er the third and fourth rotations, time periods coinciding with peak herbage mass. Meanwhile, deposited litter contained 16.5, 18.1, and 18.9 g N kg -1 and returned 27, 30, and 46 kg N ha -1 through the 158-d grazing season, equivalent to 35, 23, and 34% of total N returning through litter and excreta in CONT, SUPP, and FERT, respectively. Trampling during the 4-to 6-d grazing periods and senescence of herbage contributed to litter deposition. Increase of litter deposition and N return during the grazing season in FERT indicated this system may maintain better soil quality than CONT and SUPP. More research is necessary to examine how changes in litter deposition and N return a ect litter decomposition, N losses, and soil organic matter dynamics.

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“…Carbon and N concentrations on POM fractions were expressed on an organic matter basis after correction for ash. Ash content was determined by drying 1 g of sample at 105°C and then heating the sample at 550°C for 6 h (Jacobs et al, 2011). Total‐POC and PON were calculated by addition of C and N contents in coarse and fine POM fractions.…”

Section: Methodsmentioning

confidence: 99%

Soil Organic Matter and Root and Rhizome Responses to Management Strategies in Smooth Bromegrass Pastures

et al. 2014

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Soil organic matter (SOM) is a key component of pasture production. is study investigated how management strategies that varied amount and form of N input in a long-term experiment a ected concentrations and stocks of total-soil organic C and N, particulate organic carbon (POC), particulate organic nitrogen (PON), root and rhizome mass, C and N contents in topsoil of smooth bromegrass (Bromus inermis Leyss.) pastures with silty clay loam soils in a wet (2010) and dry (2012) year. Management strategies included: (i) unfertilized pasture grazed with unsupplemented beef cattle (CONT); (ii) unfertilized pasture grazed with dried distillers grains plus solubles (DDGS)-supplemented beef cattle (SUPP); and (iii) nitrogen-fertilized pasture grazed with unsupplemented beef cattle (FERT). A er 8 yr, management strategies had similar concentrations and stocks of total-soil organic C and N, POC, and PON, and there were no management strategy × year interactions. From 2010 to 2012, total-soil organic C and N, POC, and PON stocks increased as soils dried and soil bulk density increased. e CONT and SUPP management strategies had less root and rhizome mass (concentrations and stocks) and greater soil bulk density than FERT. ese belowground responses were consistent with earlier research conducted at the site demonstrating greater herbage accumulation and litter deposition in FERT. Management strategies that vary amount and form of N inputs into pasture appear to have low potential to a ect total-soil organic C and N concentrations in the short-term, but long-term e ects of less root and rhizome contents remain unknown.

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Influence of tillage on degradation kinetics using the litterbag method

Cited by 21 publications

References 45 publications

Effects of autumn tillage and residue management on soil respiration in a long‐term field experiment in Sweden

Effects of autumn tillage and residue management on soil respiration in a long‐term field experiment in Sweden

Litter Deposition and Nitrogen Return in Rotationally Stocked Smooth Bromegrass Pastures

Soil Organic Matter and Root and Rhizome Responses to Management Strategies in Smooth Bromegrass Pastures

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