NUMERICAL STUDY OF SOME AGE-DEPENDENT PARAMETERS IN ROOT NUTRIENT-UPTAKE
NUMERICAL STUDY OF SOME AGE-DEPENDENT PARAMETERS IN ROOT NUTRIENT-UPTAKE
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DOI：
10.1007/bf02182149
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发表时间：
1984-01-01
期刊：
影响因子：
4.9
通讯作者：
CUSHMAN, JH
中科院分区：
文献类型：
--
作者：
CUSHMAN, JH
根系养分吸收的计算机模拟已成为植物和土壤特性分析的有力工具。早期的数值模型的缺点之一是缺乏一个适当的会计年龄相关的根参数。提出了一种算法，不仅允许时间和/或空间变化的根生长速率，对流水分吸收，根密度，初始分配的养分，有效扩散系数，和缓冲能力，但也占随时间变化的根流出，根吸收能力和最大养分influxive率。文中给出了几个具有时变特性的根系吸收NH_4 ~+、NO_3 ~-、P、K的初步数值例子。
Computer simulation of root nutrient uptake has become a powerful 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. An algorithm is presented 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 NH4+, NO3-, P and K uptake for roots with temporally varying characteristics are presented.