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Computer modeling of the effect of root architecture on competition for diffusive nutrient uptake with neighboring root systems

机译：根系结构对邻近根系竞争性养分吸收竞争影响的计算机模拟

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摘要

When plants grow in group, competition for soil nutrient not only occurs within but also between root systems. Simulation of competition for nutrient by competing root systems is necessary to facilitate the quantitative root systems is necessary to facilitate the quantitative understanding of these processes, to predict the consequences of competition for nutrients, and to prioritize future research on the mechanisms of nutrient competition. The method introduced in this paper is a new procedure for studying competition between different plant root systems (multiroot competition) by quantitatively determining overlap of depletion zone between competing root systems. The multiroot competition can be simulated as a geometric model. With this model multiroot competition was successfully separated from inter-root competition. Programs had been develped to calculate both inter-root competition and multiroot competition for diffusive nutrients like P. In the assembly of root system, subject roots and neighboring roots were defined as two components of multiple root system. Three indices were introduced to estimate and quantify multiroot competition. Result of teh simulation shows that distance between roots, root shallowness and soil diffusion coefficient have significant effects on multiroot competition, and consequently affect nutrient uptake.
机译：当植物成群生长时，对土壤养分的竞争不仅发生在根系内部，也发生在根系之间。通过竞争性根系系统对营养素竞争的模拟对于促进定量根系系统是必要的，以促进对这些过程的定量理解，预测营养素竞争的后果以及优先考虑未来对营养素竞争机制的研究。本文介绍的方法是一种通过定量确定竞争根系之间的耗竭区重叠来研究不同植物根系之间的竞争（多根竞争）的新程序。可以将多根竞争模拟为几何模型。通过这种模型，多根竞争已成功地从根际竞争中分离出来。开发了程序来计算诸如P的扩散性养分的根际竞争和多根竞争。在根系统的组装中，主题根和相邻根被定义为多根系统的两个组成部分。引入了三个指数来估计和量化多根竞争。模拟结果表明，根系之间的距离，根系浅浅和土壤扩散系数对多根竞争有显着影响，因此影响养分吸收。

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