摘要
植物根系吸水特性是ＳＰＡＣ系统中水分运移规律研究的重要内容。现有的根系吸水模型大致可分为３类：经验模型、半经验半理论模型和理论模型。此领域的研究最早始于５０年代末６０年代初，进入７０年代，各种根系吸水模型相继出现。随着计算机科学的发展与普及以及ＳＰＡＣ水分传输动态模拟研究的深入，在８０年代涌现出了大批研究成果。未来研究的重点是：注重根系吸水机理研究、修改与完善已有的根系吸水模型、植物根系结构研究、根区水分运移力能关系研究、植物根系吸水特性应用研究和植物根系过程可视化的研究。
The specificity of water uptake by plant roots is an important content in the research on water transportation in the Soil-Plant-Atmosphere Continuum. The present models take into account current observations on the root growth, soil water flow through root zone and the morphogenesis of root system. All of the available models for stimulating water uptake by plant roots are classified into three categories, which include empirical models, semi-empirical and semi-theoretic models and theoretic models. The original researches in this field started in the end of 1950s or the early of 1960s, and the various simultaneous models were developed in succession in 1970s. With the rapid development of computer sciences and the simultaneous researches of water transportation by plant roots in the SAPC in a thoroughgoing way, more research achievements were completed in 1980s. In this study, the attentions are focused on (1) the present situation of each simultaneous model, different levels of model complexity and various limited factors, and (2) interactions between soil water content, explicit treatment of soil spatial bete rogeneity, plasticity of root responses to soil factors, temperature, root resp iration, morphology of root systems and the fractal geometry of simulated root systems ni1, 2, and 3 dimensional space. The research tendency in water uptake by plant roots is pointed out, and the key problems of studying in the future are presented. Those problems include (1) to strengthen the research of the mechanism of water uptake by plant roots, (2) to correct and perfect the present simultaneous models, (3) to research the three-dimensional architecture of root system, (4) to study the force and energy of water transport through root zone and application of water uptake by plant roots, (5)to study the visualization of root systems.
出处
《干旱区地理》
CSCD
北大核心
1999年第2期88-95,共8页
Arid Land Geography
基金
国家自然科学基金!49771009
