Agriculture Reference
In-Depth Information
Table 25
Yield and yield components of upland rice as infl uenced by nitrogen
application.
Nitrogen
H1
Grain Sterility
1000-grain
Panicle
Grain
Rate
(%)
Weight
(g) per plant
yield
(mgKg
-1
)
(g plant
-1
)
0
0.48 13.22
28.58
2.52
2.51
50
0.51 14.55
28.93
3.40
6.82
100
0.53 16.58
29.49
3.69
10.21
150
0.54 18.84
29.70
4.10
13.50
300
0.53 13.27
28.31
4.20
15.00
400
0.51 20.14
27.38
4.00
14.00
Mean
0.52
16.10
28.73
3.65
10.34
** CV.BRS sertaneja
Table 26
Correlation coeffi cients between grain yield and yield components
irrespective of nitrogen level.
**
Parameter
Correlation coefficient
**
Panicle number
0.819
**
Grain sterility (%)
0.143
arvest Index
0.260
*
1000 grain weight (g)
0.085
** and * significant at 1% and 5% levels respectively
too high nitrogen application or concentration of nitrogen in the
leaf is associated with the reduction on fi lled grains (Fig. 41).
Similarly, application of phosphorus infl uenced the yield
and yield components in rice. A fi eld experiment, at Chungbuk,
showed that there are appreciable changes due to application
of phosphorus; all yield and yield components are enhanced
by the application of phosphorus, even the grain fi lling ratio
(Table 27).
