Agriculture Reference
In-Depth Information
The Suitability of Different Winter and Spring Wheat Varieties for Cultivation in Organic Farming
http://dx.doi.org/10.5772/58351
Parameters
Grain yield
(t∙ha
-1
)
Density of
ears (pcs∙m
-2
)
Roots and
stem base
infestation
index (%)
Leaves
infestation
index (%)
Number of
weeds
(pcs∙m
-2
)
Dry matter of
weeds
(g∙m
-2
)
Grain yield
(t∙ha
-1
)
x
0.379*
-0.108
-0.007
-0.385*
-0.558*
Density of ears
(pcs∙m
-2
)
x
-0.055
0.062
-0.058
-0.310*
Roots and stem base
infestation index (%)
x
0.166
-0.253*
-0.018
Leaves infestation index
(%)
x
-0.127
-0.267*
Number of weeds
(pcs∙m
-2
)
x
0.404*
Dry matter of weeds
(g∙m
-2
)
x
* significant at α=0.05
Table 19.
Correlation coefficients (r) between grain yield and factors limiting the yield for all tested varieties grown in
organic system (N=108)
Cluster Grain yield
(t∙ha
-1
)
Density of
ears
(pcs∙m
-2
)
Roots and
stem base
infestation
index (%)
Leaves
infestation
index (%)
Number of
weeds
(pcs∙m
-2
)
Dry matter
of weeds
(g∙m
-2
)
Cultivars
1
3.46
381.0
12.2
27.2
78.8
36.6
Bombona, Parabola
2
3.53
390.3
6.7
19.7
95.8
34.3
Bryza, Nawra, Raweta,
Vinjett, Zadra, Żura
3
4.06
345.0
4.3
4.0
105.3
44.3
Tybalt
Table 20.
The results of cluster analysis based on grain yield and factors limiting the yield for tested varieties of spring
wheat cultivated in organic system
The results obtained in the study does not give a clear assessment of suitability of the tested
varieties to organic farming. As judged by the crop yields, cvs. Bryza and Nawra do not seem
to be the best choice for the organic farming system (although they were as resistant to fungal
diseases as the others). However, cv. Bryza showed lower competitive abilities against weeds
that other varieties did. Also cv. Parabola, due to the higher infestation by weeds and diseases
as well as because of small weight of grains (as compared to conventional system) is less
suitable for organic farming system. On the other hand, cv. Tybalt should be preferred in the
