The most common cereals for faba bean (
Vicia faba
L.) used in intercrops is conventional oat (
Avena sativa
L.) An alternative
to oat may be naked oat (
Avena nuda
L.), whose oil content and quality is double. Here, intercropping of naked oat with two
different faba bean cultivars (determinate-high tannin and indeterminate-low tannin) was compared with sole crops of each
species in 2006-2008. The treatments were: sole naked oat at 500 kernels m
2
, indeterminate sole faba bean at 50 seeds m
2
,
determinate sole faba bean at 70 seeds m
2
, and an additive series of 25%, 50%, and 75% of faba bean seeding rate mixed
with the naked oat seeding rate. Our results demonstrated that intercropping increased the Land Equivalent Ratio by +3% to
+9% over sole cropping. Raising the faba bean seeding rate in a mixture from 25% to 75% reduced oat grain yield from 630
(determinate cultivar) to 760 kg ha
-1 (indeterminate cultivar) but increased faba bean grain yield from 760 kg ha
-1. Higher
yield and leaf area index (LAI) and photosynthetically active radiation (PAR) values show that the indeterminate cultivar of
faba bean is more suitable in mixture with naked oat. The high value of competition index (CR > 1) indicates domination
and aggressiveness of faba bean towards naked oat. Regardless of cultivar type, mixture of faba bean with naked oat is less
productive than pure sowing.
