Agriculture Reference
In-Depth Information
Parameters
Grain
yield
Stem base
diseases
Leaves
diseases
Number
of weeds
Dry
matter of
weeds
Tillering Height
Density of
wheat
Dry
matter of
wheat
Grain yield
x
0.069
-0.477*
-0.463*
-0.792*
-0.205
0.124
0.716*
0.297*
Stem base
diseases
x
-0.434
-0.435*
-0.412*
-0.048
0.272*
0.358*
-0.030
Leaves diseases
x
0.223
0.369*
0.195
-0.116
-0.368*
0.129
Number of weeds
x
0.494 *
-0.099
-0.407 * -0.357 * -0.123
Dry matter of
weeds
x
0.103
-0.242 * -0.701 * -0.435 *
Tillering
x
0.597*
-0.366*
0.167
Height
x
0.030
0.188
Density of wheat
x
0.359*
Dry matter of
wheat
x
* significant at α=0.05
Table 11.
Correlation coefficients (r) between grain yield and factors limited the yield, some morphological features
and canopy parameters for all tested varieties cultivated in organic system at dough stage (N=72)
The cluster analysis based on a grain yield, weed and fungal infestation, some morphological
features and canopy structure at dough stage allowed to divide varieties into 3 groups with
similar characteristics (Table 12).
Cluster Grain yield
(t∙ha
-1
)
Leaves
infestation
index (%)
Number of
weeds
(pcs∙m
-2
)
Dry matter
of weeds
(g∙m
-2
)
Density of
wheat stand
(pcs∙m
-2
)
Dry matter
of wheat
(g∙m
-2
)
Varieties
1
3.69
19.8
100.1
158.5
191.6
683.2
Kobra Plus, Bogatka,
Tonacja
2
3.20
24.7
74.2
132.2
193.8
756.5
Spelt Schwabenkorn,
Ostka Strzelecka
3
4.26
27.4
80.5
101.3
229.7
841.3
Smuga
Table 12.
The results of cluster analysis based on grain yield, factors limiting the yield, some morphological features
and canopy parameters for tested varieties grown in organic system
The first cluster was characterized by the highest level of weed infestation (number and dry
matter) and the smallest density of wheat plants and dry matter of wheat. This cluster was
represented by 3 varieties: Kobra Plus, Bogatka, Tonacja with the lowest competitive ability
