A mathematical model was used in this study to simulate the root architecture comprising of both structural and geometric components, to reproduce the morphogenetic behaviour of the commercially important Eucalyptus genotypic root distribution pattern over time. Profile trench wall method was used to map the root intersection density of six genotypes over a period of 2 years and subsequently root length density was modelled from the root impact data, along with actual measurements from soil cores. Clones of vegetative origin showed higher penetration and proliferation capacity than those of seedling origin. Eucalyptus tereticornis and Eucalyptus camaldulensis showed greater horizontal and vertical spread than reciprocal hybrids. A major portion of the root system was confined in the 0–0.3 m depth and all the genotypes showed decreasing root length density with increasing depth. The estimated depth at which 50% of the roots were concentrated varied between 10 and 30 cm. Water use efficiency of the plants showed a positive correlation with penetration capability thereby suggesting the possible reclamation strategies by identifying potentially deep-rooted genotypes. The modelled root distribution patterns from the present study could be incorporated into agroforestry systems for better tree-crop compatibility as well as for site-specific selection of genotypes.

在这项研究中使用数学模型来模拟包含结构和几何成分的根结构，以重现商业上重要的桉树基因型根分布模式随时间的形态发生行为。剖面沟壁法用于绘制两年内六种基因型的根部相交密度图，随后根据根系影响数据以及土壤芯的实际测量值对根系长度密度进行建模。营养来源的克隆显示出比幼苗来源更高的穿透力和增殖能力。tereticornis桉树和camaldulensis桉树表现出比双向杂交更大的水平和垂直传播。根系的主要部分被限制在0-0.3 m的深度内，所有基因型均显示根深度的密度随深度的增加而降低。50％的根部集中的估计深度在10到30 cm之间变化。植物的水分利用效率与渗透能力呈正相关，从而通过识别潜在的根深蒂固的基因型来暗示可能的开垦策略。从本研究中建模的根系分布模式可以并入农林业系统中，以实现更好的树种相容性以及针对特定地点的基因型选择。