Table 4.

Correlations between canopy structure and photosynthetic characteristics of peanut.

Photosynthetic characteristic index	Canopy structure indexes
	Plant height	Crown size	Total blade area	Leaf area index	Leaf angle	Mean blade area	Transpiration rate
Net photosynthetic rate	0.495**	0.524**	0.492**	0.326*	-0.350*	0.363	-0.601**
Intercellular CO2 concentration	0.396**	0.346*	0.365*	0.223	-0.124	0.139	-0.419*
Stomatal conductance	0.616**	0.587**	0.594**	0.338*	-0.364*	0.319	-0.671**
Transpiration rate	0.382**	0.327*	0.312*	0.321*	-0.352*	0.153	-0.611**

*, p = 0.05; **, p = 0.01 by two-tailed Student’s t-test, n = 48.