摘要
基于L系统研究水稻根系三维建模及可视化,动态模拟水稻根系生长过程.通过分析水稻根系结构及生长特性,定义了水稻根系生长模型,包括:(1)根尖、分枝、种子根发根节点和不定根发根节点模式字符串;(2)单根生长、单根分枝、产生种子根和不定根产生式;(3)产生种子根及不定根节点的公理.通过不断迭代模拟水稻根系生长变化过程,并利用L-studio实现水稻根系生长的三维可视化.同时将重力因子G和偏转因子D加入水稻根系生长模型中,考察上述两个因子作用下水稻根系的生长特性.通过实验可知当G≈0.3, D≈0.3时,水稻根系生长模拟结果比较符合实际情况,可为其他植物根系生长模拟与可视化研究提供参考.
This study built an L-system model to dynamically simulate the growth and visualize the three-dimensional structures of the rice root system using the L-studio modelling environment. Firstly, the rice root structures and characteristics in the growth processes were analyzed and several modules representing the tip of root, node of branching,node to generate the seminal root, and nodes to generate the crown roots were defined. Then, a set of production rules were developed covering the growth and branching of a single root, generation of the seminal root, and crown roots. In the model, the directions of the single root depended on two factors, a gravity factor G and a deflection factor D. They were introduced into the rice root growth production rule to investigate their influences on the growth process of the rice root system. Finally, the axiom including the notes where the seminal roots and crown root were generated was defined. With the iterative replacement of the defined modules and interpretation of turtle modules in the current strings, the continuous growth processes of the rice root system were generated. In the experiments, with the fixed parameters for the roots in different orders, the rice root system was successfully simulated and visualized with LPFG and L-studio. The experimental results demonstrated that gravity factor G determine the degree the roots bend toward the earth while the deflection factor D determine the degree the roots deflect around y axis randomly and rice root growth simulation at G≈0.3 and D≈0.3 is more realistic. This study will benefit further research on the simulation and visualization of other plant root.
作者
彭英
张素兰
PENG Ying;ZHANG Su-Lan(College of Economics and Management,Dehong Teachers’College,Mangshi 678400,China;College of Big Data and Intelligent Engineering,Yangtze Normal University,Chongqing 408100,China;Research Center for Environmental Monitoring and Hazard Prevention of Three Gorges Reservoir,Yangtze Normal University,Chongqing 408100,China;Centre for Horticultural Science,The University of Queensland,Brisbane 4072,Australia)
出处
《计算机系统应用》
2020年第6期22-28,共7页
Computer Systems & Applications
基金
国家自然科学基金(61601060)
国家留学基金(201709955001)
重庆市教委高校优秀成果转化项目(KJZH17132)
长江师范学院人才引进科研启动基金(2013KYQD010)。
关键词
L系统
水稻根系
生长模型
三维建模
可视化
L-system
rice root system
growth model
3D modeling
visualization
