The Eleventh Regional Wheat Workshop For Eastern ... - Cimmyt

Crop rotation effects on grain yield and yield components ofbread wheat - Tilahun et al.
Table 5.
Effect of fertilizer rates on grain yield and agronomic parameters of
bread wheat gena 1997 and bona 1996 and 1998, Sin ana .
,
. Parainet~(s
N-P:zOs .Grain 'K~(nels 1000 ";'Spikes Ker'rl'els · Harvest- Yh~ld " Plant S'traw
rates 'yield m"2 KW .iit-2
/spike 'index Ispike height yield
(kgl~ha) (kg/ha) '(no.) (g) (no.) , (1).0.) (%) (g) (cm) I(kgtl1a)
Bona (meher) 1996
9-23 3303 10175 32,50 307 34.04 29.52 l.11 115.6 7995
41-46 3405 10417 32.75 307 34.55 27.00 l.13 118.2 9480
F-value 0.9 0.53 0.31 0.0005 0.04 6.45 0.08 6.4 5.6
Prob. ns ns ns ns ns 0.03 ns 0.03 0.04
Gena (belg) 1997
9-23 4177 11812 35.40 363 25.24 31.55 0.89 108.9 9128
41-46 4282 12082 35.42 377 24.76 30.80 0.88 109.9 9718
F-value l.13 1.14 0.0097 1.19 0.38 0.96 0.33 0.36 1.7
Prob. 0.3 0.3 ns 0.3 ns ns ns ns 0.22
Bona (meher) 1998
9-23 3483 9381 37.17 602 29.87 29,36 1.11 86.96 8374
41-46 4041 10988 36.90 697 34.07 30.01 1.25 93.50 9514
F-value 29.6 29 2.5 15.7 7.03 0.66 6.13 21.7 18.5
Prob. 0.0002 0.0002 0.09 0.002 0.02 ns 0.03 0.0006 0.001
Table 6.
Regression and correlation coefficients of agronomic parameters of bread
wheat grown following different crops gena 1997 and bona 1996 and 1998,
Sinana.
R2 .
P·arameters . Model ' P N
Straw yield (kglha) -22231 + 296.3 * plant height 0.48 0.008 12
Yield/spike (g) -1.216 + 0.035 * 1000 KW + 0.035 * kernels/spike 0.999 0.000 12
Kernels/m2 (no.) -6933 + 23.5 * productive tillers +297.8 * kernels/spike 0.977 0.000 12
Grain yield (kg/ha) -3746 + 107 *1000 KW + 0.35 * kernels/m2 0.998 0.000 12
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