Grow th Parameter Monitoring of Sweet Corn by CGM D302 Spectrometer
CHEN Qing-chun
JIANG Feng
LIN Huan
ZHANG Zi-li
LIU Peng-fei
WANG Xiao-ming
Abstract：In order to clarify the quantitative relationship between the growth parameters and ca-nopy spectral index of sweet corn and provide the decision basis for rapidly monitoring the grow th indicators of sweet corn ,the field experiment of Zhengtian 68 was carried out ,with different levels of K application .The spectral reflectance of corn canopy was measured by CGMD302 spectrome-ter at different growth stages ,while the stem diameter and leaf area index (LAI) were measured at the same time ,and then the relations between canopy spectral index and grow th parameters were analyzed .The results showed that NDVI had positive correlation with stem diameter and LAI ,while RVI had negative correlation with stem diameter and LAI .The monitoring model for a single stage was constructed based on NDVI and RVI ,which could well reflect the stem diame-ter and LAI of sweet corn and give the good test result .The prediction accuracy was above 0 .9 , the error of mean square root was less than 10% ,and the average relative error was less than 5% .
Keywords：sweet cornspectral indexstem diameterleaf area indexKmodel
Publication Date：2013-11-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 31-35,101 )