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Journal of Zhejiang University SCIENCE B
ISSN 1673-1581(Print), 1862-1783(Online), Monthly
2023 Vol.24 No.9 P.755-778
Current insights on rice (Oryza sativa L.) bakanae disease and exploration of its management strategies
Abstract: Bakanae is an emerging rice disease caused by the seed- and soil-borne pathogen Fusarium fujikuroi. It is becoming a more serious threat to sustainable rice production throughout rice-growing regions. Bakanae disease infection is responsible for high yield losses ranging from 3% to 95%, and disease incidence varies based on the region and cultivars. Hence, understanding the nature of the pathogen, its pathogenicity, disease epidemiology, symptoms, host–pathogen interaction, and the role of secondary metabolites in the disease cycle will be helpful in the development of effective and sustainable management strategies. However, very few comprehensive studies have described the details of rice bakanae disease. Thus, in this review we summarize and discuss in detail the information available from 1898 to 2023 on various critical facets of bakanae disease, and provide perspectives on future research.
Key words: Rice; Bakanae disease; Fusarium fujikuroi; Host–pathogen interaction; Pathogenicity; Gibberellic acid signaling; Disease management
机构：1西南交通大学，高速铁路线路工程教育部重点实验室，中国成都，610031；2西南交通大学，土木工程学院，中国成都，610031；3青岛零一动测数据科技有限公司，中国青岛，266000；4中国铁路设计集团有限公司，城市轨道交通数字化建设与测评技术国家工程研究中心，中国天津，300308；5深圳大学，城市智慧交通与安全运维研究院，中国深圳，518060
目的：在列车往复动力作用和复杂环境因素耦合作用下，常出现诸如钢弹簧隔振器断裂、基底不均匀沉降诱发吊空等隔振器支承刚度失效的问题。本文提出一种钢弹簧浮置板轨道支承刚度失效的方法，能及时识别失效数量、失效程度、失效位置，以避免刚度失效引起的轨道结构劣化和行车安全威胁。
创新点：1.分析隔振器支承刚度失效对浮置板轨道系统各动力指标的影响，并构建一套浮置板轨道钢弹簧失效识别方法；2.结合具有噪声的基于密度的聚类方法（DBSCAN）算法和统计分析构建一套浮置板轨道支承刚度智能监测系统，并应用于中国南部某线路。
方法：1.通过动力响应敏感性分析，得出浮置板自振频率、动位移、转角对支承刚度失效的敏感性较高（图5和6）；2.通过分析多种刚度失效的情况，得出敏感性指标和支承刚度失效的关系（表3和4，图8）；3.基于上述成果，构建智能监测系统并应用到现场，验证方法的有效性（图13和15）。
结论：1.动力学模型的敏感性分析表明，列车荷载下的浮置板一阶垂向自振频率、最大垂向动位移、转角有效值易受刚度失效影响。2.浮置板的一阶垂向频率主要跟失效数量有关；浮置板最大垂向动位移与失效高度具有较好的线性关系；浮置板转角之间的大小关系对失效位置很敏感。3.以上述方法为理论基础构建浮置板轨道支承刚度智能监测系统，成功识别出钢弹簧失效。
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DOI:
10.1631/jzus.B2300085
CLC number:
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On-line Access:
2023-06-13
Received:
2023-02-06
Revision Accepted:
2023-04-16
Crosschecked:
2023-09-13