亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

水稻白背飛虱蟲害的冠層光譜特性與蟲量反演
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:


Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統(tǒng)計(jì)
  • |
  • 參考文獻(xiàn)
  • |
  • 相似文獻(xiàn)
  • |
  • 引證文獻(xiàn)
  • |
  • 資源附件
  • |
  • 文章評(píng)論
    摘要:

    通過測(cè)試水稻白背飛虱主害代期間的冠層高光譜數(shù)據(jù),采用多元統(tǒng)計(jì)分析方法對(duì)冠層反射光譜與白背飛虱百株蟲量進(jìn)行相關(guān)分析,確定了近紅外波段779nm、1685nm及可見光波段558nm為白背飛虱蟲害的3個(gè)敏感波段;并基于這些敏感波段及由它們組成的比值植被指數(shù)(RVI)和歸一化植被指數(shù)(NDI),建立了檢測(cè)白背飛虱蟲量的5種單變量線性函數(shù)模型。分析表明,5種模型方程在α=0.01條件下極顯著相關(guān),而且利用敏感波段建模時(shí),779nm處的光譜反射率建立的模型為最優(yōu),預(yù)測(cè)相關(guān)系數(shù)達(dá)到0.921;利用植被指數(shù)建模時(shí),RVI建立的模型為最優(yōu),預(yù)測(cè)相關(guān)系數(shù)達(dá)到

    Abstract:

    0.802。The canopy hyperspectral reflectance data were recorded at the main harm stages of rice infected with Sogatella furcifera. Statistic multianalysis method was conducted on the correlation between canopy reflectance data and the Sogatella furcifera number of per hundred individual rice. Three bands, near infrared band 779nm, 1685nm and visible light band 558nm, were confirmed being sensitive to insect pest of Sogatella furcifera. Combining two bands reflectance (779nm and 558nm) into vegetation indices of RVI (ratio vegetation index) and NDVI (normalized difference vegetation index), five single variables of linear function models against the Sogatella furcefera number were established based on sensitive bands, RVI and NDVI. The results show that the five types of function models have significant correlation if α=0.01. The model established by using of the band 779nm is optimal as using sensitive band and the correlation coefficient is 0.921. The model established by using of RVI is optimal as using vegetation index and the correlation coefficient is 0.802.  

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

邱白晶,陳國(guó)平,程麒文.水稻白背飛虱蟲害的冠層光譜特性與蟲量反演[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(9):92-95.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(9):92-95.

復(fù)制
分享
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期:
文章二維碼