摘要
利用光谱分辨率为 3nm的ASDFieldSpecUV/VNIR光谱仪获得了 2 0 0 2和 2 0 0 3年水稻整个生长期的高光谱数据 ,同时对水稻叶面积指数 (LAI)和叶绿素含量 (CHL .C)进行了测定 ,对中分辨率成像光谱仪 (MODIS)的增强植被指数 (EVI)、归一化植被指数 (NDVI)以及红边位置 (REP)与LAI及CHL .C之间的关系进行了研究 .结果表明 ,LAI与冠层光谱在可见光、近红外波段相关性较好 ,叶绿素含量与冠层光谱在红光波段相关性较好 .EVI、REP和LAI之间的相关关系不受水稻覆盖率的影响 ;NDVI与LAI的相关关系在水稻低覆盖率情况下较好 ;在水稻高覆盖率情况下 ,EVI和REP比NDVI与LAI之间的相关关系要好 .MODIS NDVI、EVI及REP与叶片叶绿素含量相关性较好 .由此可见 ,EVI和REP可以有效地监测水稻LAI和CHL .C .
This paper studied the correlations between rice leaf area index(LAI),leaf chlorophyll content(CHL.C),hyper-spectral data,normalized difference vegetation index(NDVI),enhanced vegetation index(EVI),and red-edge position(REP).The results showed that LAI had a close correlation with visible and NIR bands,and CHL.C had the highest correlation with red band.A strong non-linear correlation was found between the LAI and REP of two rice varieties.For common rice,REP,EVI and NDVI were well related with LAI,but for hybrid rice,REP and EVI were more sensitive than NDVI to LAI.In 2003,REP,EVI and NDVI were well related with CHL.C.
出处
《应用生态学报》
CAS
CSCD
2004年第8期1363-1367,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目 ( 4 0 1710 65 )
国家"863"计划资助项目(200 2AA2 43 0 11
2 0 0 2AA13 0 0 10 )
