Short-term changes in soil pore size distribution : Impact of land use

A - Papers appearing in refereed journals

Jensen, J. L., Schjonning, P., Watts, C. W., Christensen, B. T. and Munkholm, L. J. 2020. Short-term changes in soil pore size distribution : Impact of land use. Soil & Tillage Research. 199, p. 104597.

AuthorsJensen, J. L., Schjonning, P., Watts, C. W., Christensen, B. T. and Munkholm, L. J.
Abstract

Changes in land use affect the pore size distribution (PSD) of the soil, and hence important soil functions such as gas exchange, water availability and plant growth. The objective of this study was to investigate potentially damaging and restorative soil management practices on soil pore structure. We quantified the rate of change in PSD six years after changes in land use taking advantage of the Highfield land-use change experiment at Rothamsted Research. This experiment includes short-term soil degradation and restoration scenarios established simultaneously within long-term contrasting treatments that had reached steady-state equilibrium. The land-use change scenarios comprised conversion to grassland of previously arable or bare fallow soil, and conversion of grassland to arable and bare fallow soils. In the laboratory, we exposed intact soil cores (100 cm3) to matric potentials ranging from −10 hPa to -1.5 MPa. Based on equivalent soil mass, the plant available water capacity decreased after conversion from grassland, whereas no change was observed after conversion to grassland. Structural void ratio decreased after termination of grassland and introduction of grassland in bare fallow soil, while no change was seen when changing arable to grassland. Consequently, it was faster to degrade than to restore a complex soil structure. The study illustrates that introducing grassland in degraded soil may result in short term increase in soil density.

KeywordsLand-use change; Pore size distribution; Soil degradation and recovery
Year of Publication2020
JournalSoil & Tillage Research
Journal citation199, p. 104597
Digital Object Identifier (DOI)doi:10.1016/j.still.2020.104597
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Lawes Agricultural Trust
Funder project or codeS2N - Soil to Nutrition - Work package 1 (WP1) - Optimising nutrient flows and pools in the soil-plant-biota system
The Rothamsted Long Term Experiments [2017-2022]
Publisher's version
Output statusPublished
Publication dates
Online24 Feb 2020
Publication process dates
Accepted04 Feb 2020
PublisherElsevier Science Bv
ISSN0167-1987

Permalink - https://repository.rothamsted.ac.uk/item/9751z/short-term-changes-in-soil-pore-size-distribution-impact-of-land-use

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