Joint International Conference on Long-term Experiments ...

Table 3. Influences of ameliorative fertilization on nutritional status of maize
(composition of the ear-leaf at silking stage)
Korenicani field experiment: Influences of fertilization in spring 2003 (NPK 7:20:30 on
standard fertilization) on nutritional status of maize
NPK Concentrations in dry matter of ear-leaf of maize at silking stage
7:20:30 Percent (%) mg kg -1
kg ha -1 P K Ca Mg S Fe Mn Zn Cu Cd
0
1250
2500
3750
The growing season 2003
0.29
0.31
0.30
0.32
2.14
2.55
2.50
2.50
0.71
0.65
0.63
0.60
0.44
0.30
0.25
0.24
0.19
0.20
0.18
0.19
122
127
129
135
83
108
105
110
66.4
63.7
56.4
56.4
16.5
17.4
15.3
17.0
0.08
0.08
0.09
0.11
LSD5% 0.02 0.21 0.09 0.03 n.s. n.s. 18 10.1 n.s. n.s.
Mean 0.30 0.24 0.65 0.31 0.19 128 101 60.7 16.5 0.09
0
1250
2500
3750
The growing season 2004
0.38
0.38
0.39
0.38
2.29
2.25
2.37
2.29
0.75
0.72
0.73
0.72
0.22
0.22
0.21
0.22
0.21
0.21
0.21
0.20
190
190
196
202
81
77
87
84
55.3
58.8
60.5
57.3
17.6
18.7
19.0
17.5
0.06
0.06
0.07
0.07
LSD5% n.s. n.s. n.s. n.s. n.s. n.s. n.s. n.s. n.s. n.s.
Mean 0.38 0.23 0.73 0.22 0.21 194 82 58.0 18.2 0.07
0
1250
2500
3750
The growing season 2005
0.36
0.38
0.41
0.41
2.06
2.19
2.23
2.47
0.66
0.63
0.66
0.65
0.27
0.23
0.23
0.22
0.21
0.21
0.22
0.21
155
191
189
171
97
100
85
96
42.7
46.5
49.6
48.3
15.0
16.1
16.8
16.1
0.02
0.04
0.03
0.02
LSD5% 0.03 0.30 n.s. 0.04 n.s. n.s. n.s. n.s. n.s. n.s.
Mean 0.39 2.18 0.65 0.24 0.21 177 94 46.8 16.0 0.03
In general, based on our field experiment experiences in the last decade period, liming
was more influencing factor of field crops yield compared to ameliorative fertilization
with P and K. For example, Kovacevic et al. (2006) applied carbocalk (waste of sugar
factory, 39% CaO) in five rates up to 90 t/ha. Liming with carbokalk resulted with
considerable increases of field crop yields (maize-maize-sunflower-barley rotation )as
follows: up to 50% and 36% (maize for 2001 and 2002, respectively), up to 49%
(sunflower 2003) and up to 30% (barley 2004). In general, by application of carbocalk
in level of 90 t/ha, yields drastically decreased mainly to level of control as affected by
overliming. Using 15 t ha -1 of carbocalk on Djakovo pseudogley (the growing season
1993) yields of maize hybrids (total 10) were increased depended on hybrids in range
from 6% to 45% (Banaj and Kovacevic, 2000). Liming with carbocalk (30 t ha -1 ) was
especially useful for maize under drought stress of the 2000 growing season on Slatina
pseudogley because yield was doubled compared to the control. At the same time,
contribution of female-sterile plants was decreased from 42% to 7% only (Antunovic et
al., 2001).
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