基于探地雷达的植物根系探测研究进展

Plant root detection based on ground penetrating radar:A review

植物根系在植物的生长发育、生态系统功能以及碳循环过程中具有重要作用,需要了解根系的直径大小、生物量、空间分布和三维构造等参数.传统的植物根系的探测方法具有破坏性,费时费力,而探地雷达(Ground Penetrating Radar,GPR)作为一种较新的地球物理方法,以其特有优势广泛应用于植物根系的探测.首先介绍了利用探地雷达探测植物根系的基本原理,然后对植物根系的制图、植物根径大小的估算、根系生物量的估算等几个方面的应用进展进行了综述,并从探地雷达系统、根系性质和土壤性质等不同角度探讨了影响探地雷达在植物根系探测中的主要因素,同时指出目前研究中的不足之处,今后的研究工作应侧重于探地雷达探测植物根系的作用机理及提高其在野外真实条件下的探测能力,以期为探地雷达在植物根系探测中应用的深入和推广提供思路.

Roots play an important role in the growth and development of plants,as well as ecosystem functioning and carbon cycle processes.Contemporary methods for evaluating root parameters such as diameter,biomass,spatial distribution and three dimensional architecture are time-consuming,labor intensive,and destructive to the roots.The Ground Penetrating Radar（ GPR） is a relatively new geophysical method with applicability to plant root studies with unique advantages over traditional approaches. This article first introduces the principles of GPR as related to plant roots detection,and then reviews existing researches concerning the application of GPR to plant root mapping,root diameter and biomass estimation.The main factors affecting GPR efficacy for plant root detection are discussed from different aspects including the GPR system,plant root characteristics,soil physicochemical properties,and so on.Future research should focus on studying into the mechanisms of detecting plant roots using GPR and improving the ability of GPR to detect plant roots under field conditions,with purpose to fully explore the potential of GPR in plant root detection.