CAJ | 학술논문

通过使用便携式光谱仪对新疆石河子地区不同程度棉叶螨为害后的叶片光谱进行测量,同步进行理化参数测定,定性和定量地分析了棉叶螨为害后叶片叶绿素 a、叶绿素 b、叶绿素(a+b)、类胡萝卜素、厚度、全氮含量和含水量的变化和光谱反射特性,建立了棉叶螨叶片光谱诊断模型.结果表明：棉叶螨为害后的叶片所有理化参数较正常叶片低,叶绿素 a变化幅度最大(88.8%),叶绿素(a+b)与棉叶螨的相关性最高(r=-0.924).棉叶螨叶片光谱反射率大小在近红外(750~860 nm除外)和短波红外波段均随严重度的增加而增加,且可见光波段650 nm附近有一个独特的反射峰,但在550 nm附近低于正常叶片.605~724 nm可作为棉花棉叶螨叶片光谱识别的敏感波段,706 nm和758 nm为最佳波段.4个估测参数建立的诊断模型均达到极显著相关水平,其中 R758 nm/R706 nm建立的诊断模型检验R2最高(0.823),RE最小(0.351),可推荐为棉花棉叶螨叶片光谱识别的最佳模型.利用高光谱遥感可实现对棉花棉叶螨叶片的有效识别,可为棉花棉叶螨大面积监测提供借鉴和参考.
통과사용편휴식광보의대신강석하자지구불동정도면협만위해후적협편광보진행측량,동보진행이화삼수측정,정성화정량지분석료면협만위해후협편협록소 a、협록소 b、협록소(a+b)、류호라복소、후도、전담함량화함수량적변화화광보반사특성,건립료면협만협편광보진단모형.결과표명：면협만위해후적협편소유이화삼수교정상협편저,협록소 a변화폭도최대(88.8%),협록소(a+b)여면협만적상관성최고(r=-0.924).면협만협편광보반사솔대소재근홍외(750~860 nm제외)화단파홍외파단균수엄중도적증가이증가,차가견광파단650 nm부근유일개독특적반사봉,단재550 nm부근저우정상협편.605~724 nm가작위면화면협만협편광보식별적민감파단,706 nm화758 nm위최가파단.4개고측삼수건립적진단모형균체도겁현저상관수평,기중 R758 nm/R706 nm건립적진단모형검험R2최고(0.823),RE최소(0.351),가추천위면화면협만협편광보식별적최가모형.이용고광보요감가실현대면화면협만협편적유효식별,가위면화면협만대면적감측제공차감화삼고.
Application of hyperspectral remote sensing to monitor cotton leaves infected by spider mites can provide reference for further monitoring at large scale.In this experiment,a portable spectrometer was used to measure spectra,Chl a,Chl b,Chl (a+b),carotenoid,leaf thickness,nitrogen content,water con-tent of cotton leaves infected by spider mites in Shihezi area of Xinj iang,the physical and chemical parame-ters and spectral reflection characteristics were analyzed qualitatively and quantitatively,and spectral diag-nosis models were established for cotton leaves infected by spider mites.The results showed that all the physical and chemical parameters of cotton leaves infected by spider mites were lower than those of normal leaves,chlorophyll a had the highest change range (88.8%),chlorophyll (a+b)had the highest correlation with severity level (r=0.924),spectral reflectance of cotton leaves infected by spider mites in near infrared wave band (except 750~860 nm)and short wave infrared wave band increased with the increasing of se-verity,and there was a unique reflection peak near 650 nm,but lower than normal leaf.605~724 nm wave band could be used as sensitive bands and the 706 nm and 758 nm were the optimal bands for spectrum rec-ognition infected spider mites.Diagnosis models form four spectra parameters all reached the significant correlation level,the diagnosis model of R758 nm/R706 nm had the highest R2 (0.823),and the lowest RE (0.351),and it could be recommended to identify the best model for cotton leaf infected spider mites.In conclusion,it could effectively recognize cotton leaves infected by spider mites using hyperspectral remote sensing.