期刊文献+

紫花苜蓿现蕾期叶片SPAD值的高光谱估测

Hyperspectral Assessment for SPAD of Medicago sativa Leaves in Budding Period
下载PDF
导出
摘要 为探明高光谱反射率与紫花苜蓿叶片 SPAD值间的相关性,利用 ASD Field Spec3地物光谱仪测定现蕾期紫花苜蓿的高光谱反射率,采用统计分析方法对其进行研究。结果表明:在波长469~533 nm、562~605 nm、616~669 nm、687~701 nm和720~752 nm范围内紫花苜蓿叶片 SPAD值与一阶微分光谱呈极显著相关,微分变量 D659、SDy、SDy/SDb、SDr/SDy、SDnir/SDb、(SDr-SDy)/(SDr+SDy)和(SDnir-SDb)/(SDnir+SDb)与紫花苜蓿叶片 SPAD 值的相关性较好;构建并鉴选出精度较高(R2=0.728)的y=7.5123!0.3957(SDr/SDy)模型作为估测紫花苜蓿 SPAD值的最佳模型,其预测精度达92.79%。 In order to ascertain the relationship between hyperspectral reflectance and SPAD value of M.sativa,by using the ASD Field Spec3 field spectrometer,the authors measured the hyperspectral reflectance of M.sativa in budding period,and statistical analysis methods were used as well.The results showed that SPAD values at 469~533 nm,562~605 nm,616~669 nm,687~701 nm and 720~752 nm were significantly positively correlated with the first derivative parameters D659,SDy,SDy/SDb,SDr/SDy,SDnir/SDb,(SDr-SDy)/(SDr+SDy)and (SDnir-SDb)/(SDnir+SDb).The SPAD monitoring model,y = 7.512 3-0.395 7 (SDr/SDy)(R2=0.728),was built,which was the best monitoring model, its determination coefficient was the highest(R2=0.728),the prediction accuracy reached 92.79%.
出处 《贵州农业科学》 CAS 北大核心 2014年第8期233-236,共4页 Guizhou Agricultural Sciences
基金 中央高校基本科研业务费专项(2010YD03)
关键词 紫花苜蓿 高光谱 SPAD 估测模型 Medicago sativa hyperspectral SPAD estimation model
  • 相关文献

参考文献19

二级参考文献77

共引文献444

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部