College of Engineering, Shenyang Agricultural University, Shenyang, China.
Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
PLoS One. 2020 Sep 17;15(9):e0239093. doi: 10.1371/journal.pone.0239093. eCollection 2020.
The development of tuber-root models based on the physical properties of the root system of a plant is a prominent but complicated task. In this paper, a method for the construction of a 3D model of a potato tuber-root system is proposed, based on determining the characterization parameters of the potato tuber-root model. Three early maturing potato varieties, widely planted in Northeast China, were selected as the research objects. Their topological and geometric structures were analyzed to determine the model parameters. By actually digging potatoes in the field, field data measurement and statistical analysis of the parameters were performed, and a model parameter database was established. Based on the measured data, the root trajectory points were obtained by simulating the growth of the root tips. Then MATLAB was used to develop a system that would complete the construction of the potato tuber-root 3D visualization model. Finally, the accuracy of the model was verified experimentally. Case studies for the three different types indicated an acceptable performance of the proposed model, with a relative root mean square error of 6.81% and 15.32%, for the minimum and maximum values, respectively. The research results can be used to explore the interaction between the soil-tuber-root aggregates and the digging components, and provide a reference for the construction of root models of other tuber crops.
基于植物根系物理特性开发块根模型是一项重要而复杂的任务。本文提出了一种基于确定马铃薯块根模型特征参数来构建马铃薯块根系统三维模型的方法。选择了在中国东北地区广泛种植的三个早熟马铃薯品种作为研究对象，对其拓扑和几何结构进行了分析，确定了模型参数。通过在田间实际挖掘马铃薯，对参数进行了田间数据测量和统计分析，建立了模型参数数据库。基于测量数据，通过模拟根尖生长得到根轨迹点。然后使用 MATLAB 开发了一个系统，完成马铃薯块根三维可视化模型的构建。最后，通过实验验证了模型的准确性。对三种不同类型的案例研究表明，所提出的模型具有可接受的性能，最小和最大值的相对根均方误差分别为 6.81%和 15.32%。研究结果可用于探索土-块根聚集体与挖掘部件之间的相互作用，为其他块茎作物的根模型构建提供参考。
