Abstract:
In order to evaluate biologic effects of mixed culture of canola-field
bean on farming system, in comparison with sole cropping, an experiment
was carried out in 2004 at Ramin Agriculture and Natural Resources University,
Iran. Experimental design was randomized complete blocks with three replicates.
Different compositions of two crop, canola and field bean are treatments
of the experiment, that including 20, 40 shrub m-2 for canola
and 0, 20, 40 and 60 shrubs m-2 for field bean. Grain yield
and components of crops, weed biomass and diversity, Land Equivalent Ratio
(LER) and dominance index were evaluated. Results showed a significant
difference between sole cropping and mixed culture in grain yield and
components. In canola mixed field bean, yield of both crops was lower
than monoculture. Highest yield of canola in monoculture was gained with
40 canola shrubs m-2 (2788 kg ha-1) and lowest grain
yield was gained with intercrop of 40 and 40 canola and field bean shrub
m-2, respectively. This trend, also be observed in field bean
yield with increase of intercrop composition. It seems that cause of yields
loss is competition between two crops and decrease of branches. Highest
LER was found in mixed 20 and 60 canola and field bean shrub m-2,
respectively. And lowest LER was observed in mixed 40 and 20 canola and
field bean shrub m-2, respectively. Lowest dry matter (DM)
of weeds within mixed stands was gained with 20 canola and 40 field bean
shrub m-2. Highest DM of weeds was related to monoculture of
20 canola shrub m-2. Also, with increase density of field bean
mixed stands, DM of weeds decreased, significantly. Also, diversity of
weeds was decreased in mixed stands, in comparison with monoculture.
M.H. Gharineh and M.R. Moradi Telavat, 2009. Investigation of Ecological Relationship and Density Acceptance
of Canola in Canola-field Bean Intercropping. Asian Journal of Agricultural Research, 3: 11-17.
Subscribe Today 
