摘要
在温室条件下,利用便携式高光谱仪研究不同抗病性品种在接菌后棉苗的冠层光谱特性。结果表明,冠层光谱反射率对棉花品种间的差异敏感,病情指数与光谱反射率呈负相关。对枯萎病抗性越强,则其在近红外区的反射率越大,而感病品种光谱反射率则很小;病情越轻,光谱反射率越高,而品种间两次测定的值也存在这种负相关性。病情指数和光谱反射率线性回归分析,近红外波段决定系数较高,表明该波段对病情指数比较敏感,可用来监测棉花枯萎病害。该研究对于遥感大面积监测棉花枯萎病的发生提供理论依据。
This article evaluated the canopy spectral characteristics of cotton cultivars with different resistance inoculated by Fusariurn axyxporium in the greenhouse. The results showed the canopy spectrum of different resistance cotton cultivars were significantly different and there was negative correlation between DI（disease index） and the reflectance. The stronger the cultivars resistance to Fusariurn wilt, the higher the value of reflectance, but the susceptive cultivars are contrary. The negative correlation between DI and reflectance also lied in the different cultivars. The linearity regression of DI and reflectance showed the near infrared band sensitive to DI, so we can use this band monitoring the occurrence of cotton Fusariurn wilt. The study provide an experimental reference for the monitoring cotton Fusariurn wilt with remote sensing.
出处
《棉花学报》
CSCD
北大核心
2007年第2期155-158,共4页
Cotton Science
基金
国家科技支撑计划项目(2006BAD08A01)
国家公益性研究专项资金(2004D1B4J155)
关键词
棉花
光谱特性
枯萎病
品种
cotton
spectral characteristic
Fusarium wilt
cultivars
