Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 532271
Title Roots Partially in Contact with Soil: Analytical Solutions and Approximation in Models of Nutrient and Water Uptake
Author(s) Willigen, Peter de; Heinen, Marius; Noordwijk, Meine van
Source Vadose Zone Journal 17 (2018)1. - ISSN 1539-1663 - 16 p.
DOI http://dx.doi.org/10.2136/vzj2017.03.0060
Department(s) Alterra - Sustainable soil management
Alterra - Soil, water and land use
Plant Production Systems
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2018
Abstract Root–soil contact entails a trade-off between uptake opportunities and aeration requirements. A single root in the center of a cylinder of soil has been the standard geometry for which most root-level water and nutrient uptake models have been derived. However, this implies assumptions about complete root–soil contact and regularly spaced, parallel roots that do not conform to the situation in the field. In reality, the frequency distribution of transport distances will differ from what the cylinder model assumes, both by partial root–soil contact and irregular three-dimensional (3-D) distribution. We derived analytical equations describing the transport of water and nutrients to and uptake by roots in partial contact with soil for two extremes: (i) part of each root in contact or (ii) part of all roots in full contact and the rest without. Solutions range from negligible impacts to proportionality of uptake to the part of roots in contact with soil.
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