Photosynthetic characteristics of cotton are enhanced by altering the timing of mulch film removal

Table 2 Correlation coefficients of net photosynthetic rate (Pn) and other gas exchange parameters in various treatment groups: 1 and 10 days before the first irrigation (respectively T1, T10) and 1 day before the second irrigation (E1) after seedling emergence during 2016–2017 (n = 30)

Year	Treatment groups	Cond	Ci	Trmmol	WUE	WUEi	Ls	LUE
2016	CK	0.926^**	0.433^*	0.919^**	0.021	−0.654^**	−0.589^**	0.971^**
	E1	0.882^**	−0.011	0.809^**	0.192	−0.461^*	−0.302	0.966^**
	T1	0.938^**	0.541^**	0.830^**	0.218	− 0.855^**	− 0.784^**	0.934^**
	T10	0.939^**	0.553^**	0.875^**	0.193	−0.872^**	− 0.801^**	0.942^**
2017	CK	0.478^**	−0.331	0.590^**	0.411^*	0.305	0.358^*	0.807^**
	E1	0.480^**	−0.516^**	0.655^**	0.449^*	0.497^**	0.559^**	0.899^**
	T1	0.094	−0.768^**	0.283	0.775^**	0.801^**	0.825^**	0.889^**
	T10	0.432^*	−0.453^*	0.757^**	0.376^*	0.328	0.423^*	0.871^**

Note: Pearson correlations were used. * Significant at the 0.05 probability level (two tailed). ** Significant at the 0.01 probability level (two tailed)
Cond Conductance to H₂O, Ci Intercellular CO₂ concentration, Trmmol Transpiration rate, WUE Water use efficiency, WUEi Intrinsic WUE, Ls Limiting value of stomata, LUE Light use efficiency

ISSN: 2523-3254