Table 2 Using the halothermal time model (HaloTT), the values of kT, σψb, and To estimated for the seed germination of Zea mays L. var. 30W52 under varying Ts and ψs.

Hydrothermal time model parameters

 Ѱb (50) (MPa)

 − 0.87

 σψb (MPa)

0.30

 θH (MPa˚Ch-1)

56.29

 kT (MPa˚Ch-1)

0.104

Cardinal temperatures

 Tb (\(^\circ{\rm C}\))

20

 To (\(^\circ{\rm C}\))

33

 Tc (\(^\circ{\rm C}\))

45

 R²

0.885