Table 4.

Correlation between canopy vegetation index NDVI, GNDVI, RVI, GOSAVI, and yield at different growth stages

Stage	Cultivar	NDVI	GNDVI	RVI	GOSAVI
Trumpet stage	ZD958	0.823**	0.809**	0.796**	0.848**
	XY335	0.827**	0.835**	0.840**	0.886**
	YD606	0.748**	0.895**	0.564*	0.937**
	QL368	0.777**	0.857**	0.786**	0.857**
	Mixture	0.681**	0.810**	0.617**	0.794**
Filling stage	ZD958	0.775**	0.809**	0.754**	0.809**
	XY335	0.829**	0.844**	0.826**	0.839**
	YD606	0.963**	0.970**	0.927**	0.960**
	QL368	0.917**	0.904**	0.877**	0.897**
	Mixture	0.655**	0.853**	0.787**	0.848**
Maturity stage	ZD958	−0.806**	−0.813**	−0.823**	−0.658**
	XY335	−0.763**	−0.763**	−0.763**	−0.763**
	YD606	−0.512	−0.177	−0.223	−0.182
	QL368	0.623*	0.836**	0.376	0.833**
	Mixture	0.014	0.299*	0.090	0.236

“*” indicates the significance at the 0.05 level. “**” indicates the significance at the 0.01 level.