Influence of seed size and population on seed yield and other yield characteristics of faba bean
1997
Salih, F.A. (Shambat Research Center, Khartoum North (Sudan))
In field experiments at Shambat Research Station, Sudan, over two seasons (1987 and 1988), small and large seeds of faba bean variety BF 2/2 were planted alone and with their bulk in comparison with three mixtures of large and small seeds in the proportions of 1:2, 1:1 and 2:1 with differences in competitive capacities assessed at two population levels (16.7 and 25.0 plants/m2). Initial seed size had a large effect on inter-plant competition. Grain yield/ha from large-seeded plants increased, while that from small-seeded plants decreased when the two were grown together. Varying the proportion of large to small seeds planted affected the grain yield/ha and number of pods/plant. The number of pods/plant was by far the most important yield component influenced by seed size in 1987. Increasing the population from 16.7 to 25.0 plants/m2 increased seed yield/ha by 7.3 and 18.5 percent in 1987 and 1988, respectively, and the reverse was true for seeds/plant and number of pods/plant. This suggests that plant uniformity obtained by uniform seed size may be a basic requirement in achieving higher yield levels
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