Research on Spectral Characteristics Model of Lettuce Canopy Nitrogen Content
Lettuce canopy spectral reflectance was measured by hand-held portable spectrum analyzer, the reflectance characteristics was analyzed in the different nitrogen levels and different growth. After the first derivative treatment, then correlation analysis, lettuce canopy nitrogen associated with the foursensitive band , which were 400 ~ 470nm, 510 ~ 590nm, 600 ~ 670nm, 680 ~ 750nm. Further used stepwise regression analysis, selected the sensitive wavelengths in different growth stages. Partial least squares regression was used for setting up prediction models in different growth. 24 samples were verified models in the same period, the measured and predicted of the correlation coefficient were 0.8570, 0.8853 and 0.8591, and RMSE were 0.6355,0.6122 and 0.5472.
Lettuce Nitrogen Reflectance Spectra Partial Least Squares Regression Analysis
Gao Hongyan Mao Hanping Zhang Xiaodong Sun Jun
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education & Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
国际会议
2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)
上海
英文
2362-2365
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）