International Journal of Horticulture, 2017, Vol.7, No. 15, 124-132
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Mean followed by the same letter(s) within a treatment group are not significantly different at 5% probability
level using Duncan Multiple Range Test (DMRT).
In 2014/2015 planting, at 8 WAP, a significant increase was recorded with increase in the levels of SBE at 0 level
PM. Increase in the level of PM from 0 to 10 t/ha
-1
, at various SBE level; brought about a significant linear
increase in growth parameters of maize plant. Also, application of 7.5-10 t/ha
-1
SBE combined with 10 t/ha
-1
PM
showed a significant difference in number of leaves, plant height and number of roots while leaf area, stem girth
and total root length are not significantly different (Table 4b).
Table 4b Interactive effect of spent bleaching earth and pig dung manure on the vegetative growth and nitrogen utilization of maize
(Zea mays L.) at 8 WAP (2014/2015)
Treatment
s
Parameters
PM SBE
Number of leaves Leaf area (cm
2
) Plant height (cm) Stem diameter
(cm)
Number
of
roots
Total
root
length (cm)
0
0
14.90b
212.80c
100.70bc
3.90bc
35.50b
18.00c
5.00
17.60a
225.00b
101.70a
4.60b
37.30b
21.00b
7.50
18.00a
236.90a
101.90a
5.00a
47.00a
27.80a
10.00
18.10a
242.50a
101.90a
5.20a
47.10a
28.00a
ns
b
b
b
b
b
5
0
15.60d
224.30bc
112.10c
4.40bc
36.00d
20.00b
5.00
18.30c
230.60b
112.10c
4.80b
39.00c
20.00b
7.50
21.40a
242.60a
114.30a
5.60a
47.90ab
30.00a
10.00
21.40a
248.00a
114.20a
5.60a
48.50a
29.90a
ns
a
a
a
a
a
PM *
*
*
*
*
*
SBE * PM **
**
**
**
**
**
Note: SBE = Spent Bleaching Earth; PM = Pig Manure; ns = not significantly different at LSD (0.05) probability level; * =
significantly at LSD (0.05), ** = Highly significantly at LSD (0.05)
Mean followed by the same letter(s) within a treatment group are not significantly different at 5% probability
level using Duncan Multiple Range Test (DMRT).
2.5 Interactive effect of SBE and PM on the yield and nitrogen utilization of maize (Zea mays L.) at harvest
12WAP
Application of PM significantly affected yield and yield components of maize in 2013/2014. Plots that received
combination of t/ha
-1
SBE and 10 t/ha
-1
PM recorded the highest DMY, Cob yield, Grain yield, Harvest index and
Leaf nitrogen which were significantly higher than their controls (Table 5a).
Table 5a Interactive effect of spent bleaching earth and pig manure on the yield and nitrogen utilization of maize (Zea mays L.) at
harvest 12 WAP (2013/2014)
Treatment
s
Parameters
SBE PM DMY (ton/ha) Cob yield (ton/ha)
Grain yield (ton/ha) Harvest index
Leaf N g/kg
0
0
1.31d
1.50c
0.95d
0.62d
0.17b
2.52
1.47c
2.27b
1.25c
0.64c
0.22a
5.00
1.66b
2.40a
1.51b
0.67b
0.25a
10.00
1.83a
2.42a
1.60a
0.70a
0.26a
ns
b
b
b
b
5
0
1.76d
2.10d
1.45d
0.64d
0.24
2.50
2.20c
2.45c
1.63bc
0.72c
0.27
5.00
2.48b
2.65b
1.68b
0.75b
0.30
10.00
2.65a
2.93a
1.98a
0.76a
0.32
ns
a
a
a
a
PM *
*
*
*
*
SBE * PM **
**
**
**
**
Note: SBE = Spent Bleaching Earth; PM = Pig Manure; ns = not significantly different at LSD (0.05) probability level; * =
significantly at LSD (0.05), ** = Highly significantly at LSD (0.05)
