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Illinois Fertilizer Conference Proceedings
January 25-27, 1999

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Table 3c. Xylem anion concentrations and the total anion charge .(TAC) of measured ions as influenced by hybrid, N source and K source. Xylem exudate was collected from detopped plants at four growth stages.
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TREATMENT
Ion concentration (mM)
SO4
stages:
V4
V6
V10
R3

HYBRIDS

  

B73xLH51

 0.9 0.6 0.5 0.9

LH74xLH123

 1.3 0.7 0.6 1.0
N SOURCES  

Urea + NI

 1.0 0.7 0.5 1.1

Ca(NO3)2

 1.2 0.6 0.5 0.8
K SOURCES  

KCl

 1.1 0.4 0.5 1.1

KHCO3

 1.0 0.6 0.5 1.4

K2SO4

 1.2 0.7 0.6 0.9
ANOVA  

Hybrids (H)
*
NS
*
NS

N sources (N)
NS
NS
NS
NS

K sources (K)
NA
NS
NS
NS

H x N
NS
NS
*
NS

N x K
NS
NS
NS
NS

H x K
NS
NS
NS
NS

H x N x K
NS
NS
NS
NS

†, *, **, ***significantly different at the 0.10, 0.05, 0.01, and 0.001 probability levels, respectively.
ND = not determined.

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