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Is soil texture a m...
Is soil texture a major controlling factor of root:shoot ratio in cereals?
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- Poeplau, Christopher (author)
- Thünen Institute (vTI)
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- Kätterer, Thomas (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology
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(creator_code:org_t)
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- 2017-08-24
- 2017
- English.
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In: European Journal of Soil Science. - : Wiley. - 1351-0754 .- 1365-2389. ; 68, s. 964-970
- Related links:
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https://res.slu.se/i...
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https://doi.org/10.1...
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Abstract
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- Estimation of inputs of belowground carbon constitutes a major uncertainty in carbon (C) balance models. Fixed allocation coefficients are widely used although root:shoot ratio is known to respond to abiotic stressors. This pot experiment investigated the C allocation response of spring barley (Hordeum vulgare, L.) to soil texture and nutrient availability. Differences in nutrient availability, induced by a long-term history of contrasting N and PK fertilizer application to the soil, did not affect root:shoot ratio. Soil texture had a significant effect; the smallest root:shoot ratio (0.10) occurred in a clay loam soil and the largest (0.22) was in a sandy soil. We hypothesized that this relation was related to hydraulic properties of the root-soil contact zone and were able to confirm this relation with existing datasets from the literature. The results obtained in this study could be useful for future estimates of root-derived C inputs, for example in carbon turnover models, but thorough in situ validation with different plant species is required.Highlights We tested soil texture and nutrient controls on root:shoot ratios of spring barley in a pot experiment. Soil texture rather than nutrient availability was the most important factor affecting root growth The largest root:shoot ratio in the sandy soil might be related to water availability The texture effect proved to be significant in a meta-analysis of data from literature
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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