Temporal dynamics of soil organic matter composition and aggregate distribution in permanent grassland after a single tillage event in a temperate climate

Linsler, Deborah; Geisseler, Daniel; Loges, Ralf; Taube, F.; Ludwig, Bernard

doi:10.1016/j.still.2012.07.017

Cited by 49 publications

(18 citation statements)

References 36 publications

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“…The higher concentration of fPOM in these soils may be a result from the timing and frequency of tillage; HaAcon was last ploughed earlier and less frequent (1995) than HaAorg (2001HaAorg ( , 2002HaAorg ( , 2003 and the HiAcon had a lower ploughing frequency compared with HiAorg (1998 for HiAcon;, 1995, and 1996. The negative effect of tillage on fPOM concentration in the soil is in accord with some previous studies (Chan et al 2002;Linsler et al 2013). However, we observed no significant differences between unimproved grasslands and improved grasslands.…”

Section: Som In the Grassland Sitessupporting

confidence: 88%

Aggregation and organic matter in subarctic Andosols under different grassland management

Sandén

Gísladóttir

Lair

et al. 2015

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Quantity and quality of soil organic matter (SOM) affect physical, chemical, and biological soil properties, and are pivotal to productive and healthy grasslands. Thus, we analyzed the distribution of soil aggregates and assessed quality, quantity, and distribution of SOM in two unimproved and improved (two organic and two conventional) grasslands in subarctic Iceland, in Haplic and Histic Andosols. We also evaluated principal physicochemical and biological soil properties, which influence soil aggregation and SOM dynamics. Macroaggregates (>250 μm) in topsoils were most prominent in unimproved (62-77%) and organically (58-69%) managed sites, whereas 20-250 μm aggregates were the most prominent in conventionally managed sites (51-53%). Macroaggregate stability in topsoils, measured as mean weight diameter, was approximately twice as high in organically managed (12-20 mm) compared with the conventionally managed (5-8 mm) sites, possibly due to higher organic inputs (e.g., manure, compost, and cattle urine). In unimproved grasslands and one organic site, macroaggregates contributed between 40% and 70% of soil organic carbon (SOC) and nitrogen to bulk soil, whereas in high SOM concentration sites free particulate organic matter contributed up to 70% of the SOC and nitrogen to bulk soil. Aggregate hierarchy in Haplic Andosols was confirmed by different stabilizing mechanisms of micro-and macroaggregates, however, somewhat diminished by oxides (pyrophosphate-, oxalate-, and dithionite-extractable Fe, Al, and Mn) acting as binding agents for macroaggregates. In Histic Andosols, no aggregate hierarchy was observed. The higher macroaggregate stability in organic farming practice compared with conventional farming is of interest due to the importance of macroaggregates in protecting SOM and soils from erosion, which is a prerequisite for soil functions in grasslands that are envisaged for food production in the future.

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Section: Som In the Grassland Sitessupporting

confidence: 88%

Aggregation and organic matter in subarctic Andosols under different grassland management

Sandén

Gísladóttir

Lair

et al. 2015

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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“…In experiments by Linsler et al. () turning an existing sward by ploughing and reseeding it with a grass mixture did not lead to a reduction in soil organic C in the topsoil layer compared to an untreated control sward. These findings demonstrate the need to consider the wider environmental conditions of a grass sward when evaluating the potential C losses to the atmosphere after the renovation of grasslands.…”

Section: Renovation and Related Yields And C Fluxesmentioning

confidence: 94%

“…Due to permanent vegetation cover, soil rest, and the interactions of soil biota and soil structure, grassland sites, permanent grassland in particular, can store relatively great amounts of organic C (Six et al, 2002). The annual rate of C sequestration in grassland soils is at least twice that of arable land, depending on age, management, and frequency of land or management changes (Billen, Röder, Gaiser, & Stahr, 2009;Goidts & van Wesemael, 2007;Linsler, Geisseler, Loges, Taube, & Ludwig, 2013). A foremost strategy for climate protection would thus be the preservation and creation of grassland.…”

Section: Yields and C Fluxesmentioning

confidence: 99%

Grassland renovation has important consequences for C and N cycling and losses

Kayser

Müller

Isselstein

2018

Food and Energy Security

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Sward degradation is a serious threat to the functioning of agricultural grassland and the provision of ecosystem services. Renovation measures are frequently applied to restore degraded swards. The success is highly variable, and substantial trade-offs can be related to the process of renovation. This paper starts with a general classification of renovation measures and then investigates the processes that are directly related to renovation and lead to a change in botanical composition and affect soil functions and C and N fluxes. These processes are strongly interrelated and dependent on site, climate, and management condition as well as on the timescale. The more an existing and degraded sward is deliberately disturbed prior to a renovation measure, for example, by ploughing, the stronger will be the change in sward composition, and the stronger will be the potential yield and quality advantage. However, the risk of a release of soil organic C and N emissions to the environment will also increase. These emissions will usually decrease in time, but so will the positive effects on sward composition. This demonstrates that the renovation of swards is normally the second best solution and a proper and well-adapted grassland utilization and management should be adopted to avoid degradation in the first place. K E Y W O R D Scarbon, nitrogen, reseeding, sward improvement, vegetation

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“…Ploughing after a long period of NT redistributes the organic carbon which had become concentrated at the soil surface after many years of NT (Kettler et al, 2000;VandenBygaart and Kay, 2004). Overall, organic carbon stocks in the profile have been shown to be similar or lower 4-5 years after a single mouldboard ploughing, with lighter textured soils (more coarse grained) being more susceptible to loss (Kettler et al, 2000;VandenBygaart and Kay, 2004;Linsler et al, 2013). Indeed, VandenBygaart and Kay (2004) reported that as much as two thirds of the soil organic carbon gained from NT was lost due to a single mouldboard ploughing on a low organic carbon (~1%) sandy loam, with little difference in sandy loam with high levels of organic carbon (~2-3%) or on heavier textured soils.…”

Section: Limitations Perspectives and Implicationsmentioning

confidence: 99%

Occasional mouldboard ploughing slows evolution of resistance and reduces long-term weed populations in no-till systems

Renton

Flower

2015

Agricultural Systems

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Temporal dynamics of soil organic matter composition and aggregate distribution in permanent grassland after a single tillage event in a temperate climate

Cited by 49 publications

References 36 publications

Aggregation and organic matter in subarctic Andosols under different grassland management

Aggregation and organic matter in subarctic Andosols under different grassland management

Grassland renovation has important consequences for C and N cycling and losses

Occasional mouldboard ploughing slows evolution of resistance and reduces long-term weed populations in no-till systems

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