Correlative Analyses Of Remote Sensing Spectral And Vegetable Soybean Aboveground Biomass

In recent year, the remote sensing technology in yield assessing were developed. The paper reviewed the application status of crop-yield assessing by remote sensing, then the correlation between vegetable soybean spectral reflectance were discussed on the base of experiment.Monitoring the changes of spectrum in the crop of growth duration, studying the relation between reflectance and LAI , aboveground biomass, the weight of fresh leaf , chlorophyll , carotenoid. It gave proof of monitoring crop condition and assessing yield by means of remote sensing technology. The canopy reflectances of soybean were measured eight times with L97 during the growth stages. The trend of different kinds of vegetable soybean ,correlative analyses of spectral reflectance,aboveground biomass were studied. Then established the sensive wave-length for crop-yield assessing.The main result were that: it showed that the four type of vegetable soybean had the same trend during the growth stages. Different type of vegetable soybean had little difference. The green waveband region from 550nm to 600nm had the most similar, and the most differentia lie near infrared waveband region higher than 760nm. The determination of coefficient(R~2) was more higer between reflectance and aboveground biomass on 28 th, Sep and on 8th, Oct. The determination of coefficient of Taiwangerhao reached 0. 939. The reflectance has an intime relationship with soybean biomass in red waveband and near infrared waveband. The determination of coefficient grows with wavelength between reflectance and biomass near infrared waveband.Finally, the RVI model constructed by wavelength 750nm and 700nm has a significant relationship with vegetable soybean aboveground biomass.It can greatly improve remote sensing ability for estimation biomass, the R2 reaches 0.8563. Tt applys the sensive wavelength for...