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Illinois Fertilizer Conference Proceedings
January 25-27, 1999

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Table 3. Xylem anion concentrations and the total anion charge (TAC) of measured ions as influenced by hybrid, N source and K source. . Xylem etudate was colleted from detopped plants at four growth stages.
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TREATMENT
Ion Concentration (mM)
 
C1
NO3
PO4
Malate
SO4
stages:
V4
V6
V10
R3
V4
V6
V10
R3
V4
V6
V10
R3
V4
V6
V10
R3
V4
V6
V10
R3
HYBRIDS
 
B73xLH51
2.0
2.4
2.0
ND
13.7
4.9
5.1
1.8
 1.2 1.1 0.7 0.7 0.7 1.9 0.6 1.1 0.9 0.6 0.5 0.9
LH74xLH123
1.9
1.4
2.4
ND
12.1
4.9
4.4
0.7
 1.3 1.1 0.8 1.7 0.5 1,8 0.8 1.5 1.3 0.7 0.6 1.0
N SOURCES
 
Urea + NI
1.8
1.4
0.1
ND
15.2
6.6
4.9
1.9
 1.2 1 0.7 1.3 0.2 1.2 0.5 1.2 1.0 0.7 0.5 1.1
Ca(NO3)2
2.1
2.5
2.3
ND
10.6
3.1
4.8
0.7
 1.3 1.1 0.7 1.1 0.9 2.5 0.8 1.5 1.2 0.6 0.5 0.8
K SOURCES
 
KCl
3.4
3.6
2.2
ND
11.6
4.6
4.2
0.9
 1.5 1.2 0.8 1.0 0.5 2 0.6 2 1.1 0.4 0.5 1.1
KHCO3
1.2
0.8
2.1
ND
14.0
5.7
5.4
2.0
 1.1. 1.1 0.6 1.6 0.6 2.1 0.6 0.9 1.0 0.6 0.5 1.4
K2SO4
1.2
1.3
2.3
ND
13.1
4.3
4.6
0.9
 1.1 0.8 0.7 1 0.6 1.4 0.7 1.1 1.2 0.7 0.6 0.9
ANOVA
 
Hybrids (H)
NS
NS
NS
-
*
NS
NS
NS
NS
NS
NS
†
*
NS
NS
NS
*
NS
*
NS
N sources (N)
*
NS
NS
-
***
***
NS
†
*
NS
NS
NS
***
***
NS
NS
NS
NS
NS
NS

K sources (K)
***
*
NS
-
*
NS
NO
NS
***
*
NS
NS
*
NS
NS
NS
NA
NS
NS
NS

H x N
NS
NS
NS
-
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
*
NS
NS
*
NS

N x K
NS
NS
NS
-
+
NS
NS
NS
NS
NS
NS
NS
†
NS
NS
NS
NS
NS
NS
NS

H x K
NS
NS
NS
-
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS

H x N x K
NS
NS
NS
-
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
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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