Abstract
Spectral-plant parametric functional relations of two widely cultivated and diverse pigeonpea cultivars (GT-100 and BDN-2) revealed a decline in red radiance values from 10 weeks after sowing (WAS) onwards in both the cultivars and an increase in red radiance at 16 WAS associated with leaf senescence. Increased IR radiance was noticed at peak leaf area indices. IR/R ratio attained peak values by 16 WAS and higher IR/R ratio in GT-100 was associated with high LAI. ND attained a value of 0.87 in GT-100 and 0.84 in BDN-2 during first flowering stage. IR/R ratio and ND values were positively and red radiance values negatively correlated with LAI and dry matter. Based on coefficient of determination values, the regression models between plant parameters and ND for GT-100 and IR/R ratio for BDN-2 were suggested for estimating pigeonpea development.
Published Version
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