稻纵卷叶螟为害下水稻孕穗期的光谱特征及生物量分析
毕业论文关键词：稻纵卷叶螟；光谱特征；诊断模型；生物量
Analysis of the spectral characteristics and the biomass of rice damaged by Cnaphalocrocis medinalis at booting stage
Student majoring in Plant Protection An chao
Tutor Wang cuihua
Abstract: In order to obtain the sensitive bands and the characteristics of rice biomass under different damage degrees of Cnaphalocrocis medinalis, we studied the changes of spectral reflectance of the rice leaf under different damage levels, extracted the characteristics of the spectral absorption from the spectral curves of damaged rice, identified the sensitive bands and rice biomass changes, and provided the theoretical indexes and methods for remote sensing monitoring the damage degree of Cnaphalocrocis medinalis. AccuPAR is used to monitor the spectral reflectance of rice leaves at rice booting stage under different damage levels using ASD spectrometer, SPAD instrument and plant canopy analyzer, and the changes of rice biomass were measured. Spectrum, biomass and pest damage degree, and provide the theoretical basis and forecast index for remote sensing monitoring and prediction of the damage degree of Cnaphalocrocis medinalis. Selecting the sensitive bands to reflect the damge degrees of Cnaphalocrocis medinalis, building damage degree diagnostic model. Hereby studying the effect of the damage degree of Cnaphalocrocis medinalis on spectral reflectance of rice plants and biomass of rice. At rice booting stage, there is a significant negative correlation between the damage level and the reflectivity in the range of 760 - 1000nm band in the infrared region, and linear inverting the reflectivity of 760nm band and its combination, obtaining the initial diagnosis model predict leaf damage degree: Y = -26.864x + 16.871, and R² = 0.397. After damaged by Cnaphalocrocis medinalis, the spectral reflectivity of rice leaf is obviously different, and the spectral characteristics could be used to monitor the damage degree of rice leaf.
Key words:Cnaphalocrocis medinalis；Spectral features；diagnostic model；Biomass
目 录
摘要1
关键词1
Abstract1
Key words1
引言2
1 材料与方法3
1.1 试验区水稻的生长状况及受稻纵卷叶螟为害情况3
1.1.1 试验田3
1.1.2试验水稻品种及试验设计3
1.1.3 供试虫源 3
1.1.4 罩笼设置3
1.1.5 接虫时间及测定方法3
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