麦长管蚜胁迫下不同小麦品种冠层光谱特征及其预测模型  

Canopy hyperspectral characteristics and its predication model for the amount of grain aphid Sitobion avenae under different wheat cultivars

作　　者：胡祖庆[1] 亢菊侠[2] 罗晨[1] 胡想顺[1] 张改生[3] 赵惠燕[1] 

机构地区：[1]旱区作物逆境生物学国家重点实验室/西北农林科技大学植物保护学院,陕西杨凌712100 [2]杨凌职业技术学院药物工程分院,陕西杨凌712100 [3]西北农林科技大学农学院/国家杨凌农业生物技术育种中心/国家小麦改良中心杨凌分中心/小麦育种教育部工程研究中心/陕西省作物杂种优势研究与利用重点实验室,陕西杨凌712100

出　　处：《南京农业大学学报》2015年第2期267-272,共6页Journal of Nanjing Agricultural University

基　　金：陕西省科学技术研究发展计划项目(2013K02-12);西北农林科技大学基本科研业务费专项资金(QN2013011)

摘　　要：[目的]构建不同小麦品种基于冠层光谱参数的麦长管蚜百株蚜量预测模型。[方法]采用便携式野外光谱仪测定不同百株蚜量下3个小麦品种‘1376’‘Amigo’和‘小偃-22’的冠层高光谱反射率,并对冠层反射率与百株蚜量进行了相关和回归分析。[结果]在400～900nm波段内,随着百株蚜量的增加,3个小麦品种冠层光波反射率下降,且部分波段内达到极显著水平（P〈0.01）;选择可见光波段的405nm、近红外波段的835nm作为3个小麦品种共有的特征波长点,构建出的3个小麦品种的百株蚜量预测模型的显著性均达到极显著水平（P〈0.01）,且3个小麦品种405nm波长点模型均优于835nm波长点。[结论]利用高光谱信息同时预测不同小麦品种麦长管蚜百株蚜量是完全可行的。[Objectives]It is becoming more and more important to use mixed wheat cultivars to control wheat pests.The paper studied the key spectral parameters and models of different wheat cultivars under being damaged by different amount of grain aphid Sitobion avenae.These results contribute to estimating the amount of aphids per one hundred plants under mixed wheat cultivars.[Methods]Three cultivars wheat（‘1376＇‘Amigo＇and‘Xiaoyan-22＇） and four damage levels of slight（20-30 aphids per hundred plant）,moderate（450-550 aphids per hundred plant）,moderate and serious side（1200-1300 aphids per hundred plant）,and serious（2200-2300 aphids per hundred plant） were used in this study.Hyperspectral reflectance within 400-900nm of these cultivars wheat canopies were measured by the ASD portable spectrometer under different damage levels.The correlations and regressions were analyzed between single wavebands,vegetation indices of Ratio Vegetation Index（RVI） and Normalized Difference Vegetation Index（NDVI） and the amount of aphids per one hundred plants.[Results]The percent reflectance on three cultivars wheat canopy decreased with the increase of infestation by wheat aphid at visible light wave bands（400-700nm） and near-infrared wave bands（701-900nm）.Furthermore,the percent reflectance significant difference occurred in some wave bands（P〈0.01）.The sensitive wave bands included visible wave band of 405nm and near-infrared band of 835nm on all three cultivars wheat.These sensitive bands were selected out to calculate the vegetation indices of RVI and NDVI.Unvaried linear function models for determining the amount of aphids per one hundred plants were established based on above sensitive wave bands,RVI,and NDVI.Meanwhile,the model equation based on the two sensitive wave bands had very significant correlation with the amount of aphids per one hundred plants for all three cultivars wheat,and the model according to the spectral reflectivity at 405 nm were optimum for all cultivars wheat

关 键 词：麦长管蚜 小麦品种 光谱测量 预测模型 

分 类 号：S435.122.2[农业科学—农业昆虫与害虫防治]