| 基于探地雷达和电容法的作物根系原位无损测量技术研究进展 |
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| 引用本文： | 刘秀位,谷慧杰,韩洁,姜寒冰,段世名.基于探地雷达和电容法的作物根系原位无损测量技术研究进展[J].农业工程学报,2020,36(20):226-237. |
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| 作者姓名： | 刘秀位 谷慧杰 韩洁 姜寒冰 段世名 |
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| 作者单位： | 中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室/河北省节水农业重点实验室,石家庄 050022;中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室/河北省节水农业重点实验室,石家庄 050022;中国科学院大学,北京 100049;河北科技大学图书馆,石家庄 050018 |
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| 基金项目： | 政府间国际科技创新合作重点专项（2017YFE0130500）；河北省重点研发计划项目（20326404D）；河北省自然科学基金项目（C2020503005） |
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| 摘 要： | 改善根系结构提高作物的抗逆特性是保障粮食安全的有效途径。但传统破坏性取样根系测量方法费时费力，且破坏了根系的原位状态。为满足栽培和育种对根系信息的需求，亟需发展原位无损的根系测量方法。因此，该研究综述了相关技术的研究现状，以目前能够在田间应用的作物根系原位无损测量技术-探地雷达和电容法为例，系统分析总结了两者技术原理、当前应用情况、存在的关键问题以及未来研究方向等，研究认为，提高探地雷达测量作物根系的精度和证实电容法测量根系的可行性是未来研究主要的着力点。
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| 关 键 词： | 根系 原位无损测量 探地雷达 电容法 土壤水分 |
| 收稿时间： | 2020/4/28 0:00:00 |
| 修稿时间： | 2020/9/28 0:00:00 |
Research progress of ground penetrating radar and electrical capacitance for in-situ non-destructive measurement of crop roots |
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| Liu Xiuwei,Gu Huijie,Han Jie,Jiang Hanbing,Duan Shiming.Research progress of ground penetrating radar and electrical capacitance for in-situ non-destructive measurement of crop roots[J].Transactions of the Chinese Society of Agricultural Engineering,2020,36(20):226-237. |
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| Authors: | Liu Xiuwei Gu Huijie Han Jie Jiang Hanbing Duan Shiming |
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| Institution: | 1.Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences /Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences/Hebei Key Laboratory of Agricultural Water-saving, Shijiazhuang 050022, China;;1.Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences /Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences/Hebei Key Laboratory of Agricultural Water-saving, Shijiazhuang 050022, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Hebei University of Science and Technology Library, Shijiazhuang 050018, China |
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| Abstract: | Abstract: Improving root structure of crops is an effective way to solve the conflict between food production and environment. However, traditional root research methods (such as excavation) are time-consuming, labor-intensive, destroying the in-situ state of roots and point based, which make them difficult to meet the requirements to obtain root information for cultivation and breeding. Therefore, it is urgent to develop in situ non-destructive method for detecting the root. While, some progress has been made in the non-invasive detection of roots in developed countries, the related research is limited in China. Hence, this paper summarized the research status of in situ root non-destructive detection technology and then took the ground penetrating radar and electric capacitance method as examples, which can detect crop root in field non-invasively, to systematically review the principles, applications, unsolved questions and future research focus. Both ground penetrating radar and electrical capacitance can use linear models to predict root size (such as root length, diameter and biomass etc). Besides that, ground penetrating radar can also measure root parameters by nonlinear model and forward model. However, ground penetrating radar was extensively used to measure the coarse root not in fine root detection. So far, there is limited literature to summarize the model for ground penetrating radar to predict crop root parameters. As contrast, electrical capacitance method was widely used to measure crop roots. But in recent years, it was questioned that the feasibility of measuring root, which mainly consists of two aspects: as the leakage of electric current from the near root base, root system can''t be detected; the stem and root system form a series circuit with the growth medium as the boundary, In the series circuit, the value of the capacitor is mainly determined by the value of the smaller capacitor, because the capacitance of the stem is less than that of the root, so the value measured by the capacitance method reflects the information of the interface between the stem and the substrate. Therefore, this paper focuses on: (1) the principle of ground penetrating radar and electrical capacitance for phenotyping roots and the summary as well as comparison of models for predicting root parameters; (2) the applications of ground penetrating radar and electric capacitance for measuring root system, analysis of main influencing factors for measuring root system and particular discussion about the electric capacitance feasibility in detecting roots; (3) the comparison between ground penetrating radar and electrical capacitance. The main focus of future research is to improve the accuracy of ground penetrating radar measurement of crop roots and to verify the feasibility of electrical capacitance method for root measurement. Hence, four suggestions were made for the future development: (1) improving the accuracy of ground penetrating radar in detecting crop roots; (2) clarifying the principle of electrical capacitance to detect root system; (3) measuring more root traits; (4) considering the knowledge of physics, mathematics, plant physiology, breeding and other related subjects in application. Furthermore, as the spatial variation of soil water moisture is consistent with the distribution of root system, rapid monitoring the spatial changes in soil moisture by ground penetrating radar and electrical resistivity tomography may provide information of root distribution. Therefore, this paper also briefly reviews the application of these two techniques in soil moisture detection. Overall, this review aims to provide important references for domestic researchers. |
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| Keywords: | crop root non-destructively detecting in situ ground penetrating radar electrical capacitance soil moisture |
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