CAJ | 학술논문

采用光谱分析方法对生长在东北黑土上的大喇叭口期春玉米进行了不同施氮量、不同品种的冠层光谱特征研究。结果表明：不同施氮量下玉米冠层全光谱曲线图具有类似的趋势，350～500 nm和640～660 nm波段内反射曲线随着施氮水平的增加呈上升趋势，光谱反射率在不同波段差异较大，在可见光波范围内，350～500 nm波段内N2处理光谱反射率普遍高于其他处理，在500～650 nm附近反射率N0＞N3＞N2＞N1，反射曲线呈先下降后上升趋势排列；在750～1350，1450～1800，2000～2350 nm波段内的玉米冠层光谱特征在不同施氮量下也呈现不同的趋势；施氮量对750～1350，1450～1800，2000～2350 nm波段内的玉米冠层光谱特征有一定程度的影响；正常施氮量条件下不同品种玉米全光谱曲线在整个波段的趋势均一致，聚类分析显示不同玉米品种在不同波段光谱反射率差异较大。
채용광보분석방법대생장재동북흑토상적대나팔구기춘옥미진행료불동시담량、불동품충적관층광보특정연구。결과표명：불동시담량하옥미관층전광보곡선도구유유사적추세，350～500 nm화640～660 nm파단내반사곡선수착시담수평적증가정상승추세，광보반사솔재불동파단차이교대，재가견광파범위내，350～500 nm파단내N2처리광보반사솔보편고우기타처리，재500～650 nm부근반사솔N0＞N3＞N2＞N1，반사곡선정선하강후상승추세배렬；재750～1350，1450～1800，2000～2350 nm파단내적옥미관층광보특정재불동시담량하야정현불동적추세；시담량대750～1350，1450～1800，2000～2350 nm파단내적옥미관층광보특정유일정정도적영향；정상시담량조건하불동품충옥미전광보곡선재정개파단적추세균일치，취류분석현시불동옥미품충재불동파단광보반사솔차이교대。
Using the method of spectral analysis , in the bell mouth period of black soil spring corn , canopy spectral characteristics under different N application and different varieties were studied .The re-sults showed that the corn canopy full spectrum graph under different N application has a similar trend , and reflection curve within 350-500 nm and 640-660 nm increases with the increase of nitrogen level . Spectral reflectivity is greatly different at different wavelengths ,and within the scope of visible light ,N2 treatment within 350-500 nm is generally higher than that of other spectral reflectance ,near the 500-650 nm reflectivity is N0> N3> N2> N1 ,and reflection curves are arranged to first show a falling then rising trend ;In 750-1 350 nm ,1 450-1 800 nm and 2 000-2 350 nm bands ,corn canopy spectral characteristics under different N application amount also show a trend of difference ;N application amount has certain effects on corn canopy spectral characteristics of 750-750 nm , 1 350-1 800 nm and 2 000-2 350 nm bands;Full spectrum curve of different corn variety under normal N application condi-tions in the whole band is consistent .Clustering analysis shows that spectral reflectance of different maizevarieties in different bands is greatly different .