ABA production, Lui uptake 2007

[hussein...@gmail.com]

Hi,

in order to calibrate ABA model in partial root zone irrigation for Potato

there is defult sub model in daisy 5.37 as follows

(defABAproduction "Fulai Liu uptake" uptake

  "ABA concentration in water uptake as function of water potential.Based on data collected by Fulai Liu, 2007."

  ;; 'h' is the soil potential in [cm].  This function converts 'h' ;; into an ABA concentration in water from that volume of soil.

(expr (* 26.625 [ng/cm^3] (exp (* -4.2816 [MPa^-1] (convert h [MPa]))))))

In Safir  D3-2 file , it was mentioned that:

Figure 2. ABA concentration (X-[ABA]) as a response to soil water potential Abrahamsen (pers. comm.

2009).

So my question is: Where i could find more details of this relation: ABA= 26.625*EXP (-3.2816*h(soil))?

Which article this relation corresponds to ? ist Liu (2008) or Plauborg et al 2010 ??

Best regards

Hussein