Abstract
Computer simulation of root nutrient uptake has become a very powerfull tool in the analysis of plant and soil characteristics. One of the shortcomings of earlier numerical models is the lack of a proper accounting for age-dependent root parameters. In this article we present an algorithm that not only allows for time-and/or space-varying root growth rates, convective moisture uptake, root density, initial distribution of nutrient, effective diffusion coefficients, and buffer power; but also accounts for time-varying root efflux, root absorption power and maximum nutrient influxive rate.
Several elementary numerical examples of NH +4 , NO −3 , P and K uptake for roots with temporally varying characteristics are presented.
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Contribution from the Purdue Agric. Exp. Stn., W. Lafayette, IN. Journal Paper No. 9476.
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Cushman, J.H. Numerical study of some age-dependent parameters in root nutrient uptake. Plant Soil 79, 123–141 (1984). https://doi.org/10.1007/BF02182149
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DOI: https://doi.org/10.1007/BF02182149