摘要
本文应用模糊聚类方法分析了小麦纹枯病的田间流行动态，结果表明：该病在田间的流行动态可以划分为５～６个阶段，即冬前发生期、冬季稳定期、返青上升期、拔节后为害期、抽穗白穗显症期等阶段。小麦纹枯病的田间分布和扩展，通过Ｘ１、Ｘ２、Ｘ３、Ｘ４几个参数来描述。聚类分析刻划了小麦纹枯病在田间的分布，水平方向和垂直方向的扩展情况，即刻划了病害在时间、空间上的变化。
This paper analyses the field epiemic dynamics of wheat sharp eyespot, using the method of Fuzzy clustering. The results show: the field epidemic dynamics of the disease can be divided into 5～6 stages, namely the occurrence stage before winter, winter steady stage, turning green rising stage, jointing evil stage and white ear showing illness stage. The field distribution and expanding of wheat sharp eyespot can be described with several parameters, such as X1, X2, X3, X4. Fuzzy clustering analysis describes the condition of the field distribution of wheat sharp eyespot, of both horizontal expanding and vertical directions. That is, it describes the changing of the disease in time and space. The results provide the reliable basis for forecast and integrated control of wheat sharp eyespot.
出处
《植物病理学报》
CAS
CSCD
北大核心
1997年第1期23-27,共5页
Acta Phytopathologica Sinica
关键词
小麦
纹枯病
模糊聚类分析
流行动态
Wheat sharp eyespot Fuzzy clustering analysis Epidemic dynamics
