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- W2017576963 abstract "Soil compaction is a severe agricultural problem. It is characterized by an increased resistance to root penetration and by a decreased amount of porosity in the soil. Until today it is not clear whether crop roots are able to actively detect remaining pores in compacted soil. Moreover, little is known about the capability of roots to leave pores again if the mechanical resistance of the bulk soil allows so. The aim of this study was to investigate the root growth response of spring barley (Hordeum vulgare L. cv. Ascona) in different configurations of a compacted loamy soil containing pores. The three-dimensional configurations of the root systems from three well watered and fertilized treatments were analyzed with X-ray computed tomography. All soil-filled cylindrical plastic pots (diameter: 60 mm, height: 210 mm) contained loose topsoil but differed in subsoil structure. In treatment ‘Loose' [L] the pots were entirely filled with loose soil. Treatment ‘Lower part compacted' [C] contained compacted soil in the lower part of the pots. Likewise, treatment ‘Pores' [P] contained compacted soil in the lower part too, but here 16 artificial pores (1 mm diameter) were generated in the central part of the compacted subsoil zone. Comparison of the two treatments with compacted soil [C] and [P] showed that the roots were able to detect pores. However, the roots frequently grew across the pores or left the pores again after having grown into them, leading to a significantly higher fraction of roots exploring the compacted soil in the treatment with pores compared to the treatment without pores. These findings are useful for designing controlled experiments in pots of limited size that can mimic root growth in relatively complex soil structures which are more similar to field situations than usual pot experiments." @default.
- W2017576963 created "2016-06-24" @default.
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- W2017576963 date "2014-10-21" @default.
- W2017576963 modified "2023-10-01" @default.
- W2017576963 title "Artificial pores attract barley roots and can reduce artifacts of pot experiments" @default.
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- W2017576963 doi "https://doi.org/10.1002/jpln.201400142" @default.
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