Efficiency on the Use of Radiation and Corn Yield under Three Densities of Sowing
Table 1
Analysis of variance and mean separation densities of three to six maize cultivars evaluated in years 2008, 2009, and 2010.
Factor
LAI
IR (%)
GN m−2
Biomass g m−2
Yield g m−2
RUE (g MJ−1)
HI
Years ()
NS
NS
NS
2008
3.3
85.1
0.64
2588.1
3505.9
1132.6
0.79
0.323
2009
3.6
86.1
0.62
2824
2784.7
951.4
0.51
0.342
2010
3.5
85.6
0.63
2706
2909.1
964.1
0.54
0.333
DSH0.05
0.21
3.33
0.033
158.3
233.7
59.1
0.033
0.0439
Density ()
NS
6.9 plants m2
2.95
81.83
0.60
2382.8
2687.6
931.8
0.54
0.351
7.8 plants m2
3.55
86.32
0.62
2688.4
3114.6
992.1
0.58
0.333
8.9 plants m2
3.82
88.59
0.66
3046.9
3397.7
1150.2
0.68
0.349
DSH0.05
0.211
3.33
0.032
158.3
233.5
59.1
0.033
0.038
Cultivars ()
NS
“Jiquipilco”
3.8
86.42
0.66
2768
3390.8
1156.1
0.67
0.341
“Amarillo Almoloya”
3.12
85.02
0.61
3022
3003.2
1052
0.62
0.361
“Cacahuacintle”
3.75
89.2
0.70
2139
3646.8
964.9
0.60
0.264
“Condor”
3.28
84.2
0.59
2889
2947.30
1021.7
0.57
0.347
“H-50”
3.70
89.9
0.61
2898
2980.1
990.1
0.58
0.332
“Z-60”
3.04
83.5
0.58
2518
2431.9
936.7
0.55
0.389
DSH0.05
0.43
4.70
0.034
346.2
475.3
90.34
0.051
0.521
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CV%
15.7
6.9
6.41
16.1
19.1
11.2
10.8
18.8
, , , and ns: no significant difference. Columns with the same letter in each study factor are statistically equal (); HSD: honest significant difference; CV: coefficient of variation; LAI: leaf area index; IR: intercepted radiation; : light attenuation coefficient; GN: grain number; EUR: efficiency in the use of radiation; HI: harvest index.
