Plant available water in saline soils – revisited
C. D. Grant
A C and P. H. Groenevelt B
+ Author Affiliations
- Author Affiliations
A School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, PMB 1 Glen Osmond, SA 5064, Australia.
B School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada N1G 2W1.
C Corresponding author. Email: cameron.grant@adelaide.edu.au
Soil Research 57(3) 239-246 https://doi.org/10.1071/SR18354
Submitted: 29 November 2018 Accepted: 11 February 2019 Published: 19 March 2019
Abstract
We revisit a previously published approach, and present a new approach, to calculate the effect of osmotic stress on soil water availability assuming conservation of mass with respect to salt. The two (completely different) approaches allow the water capacity to be attenuated and a plant-sensitivity factor is introduced to enhance flexibility in modelling when new plant-response data arises. The results should be of value in evaluation of different cultivars of important crops being screened in the field for genetic tolerance to salinity in different soils.
Additional keywords: Groenevelt–Grant equation, integral water capacity, plant sensitivity to salt, weighting functions.
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