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Influence of simulated seed rain on the seed bank of wild-proso millet

Williams, Bill J., Harvey, R. Gordon
Weed science 2002 v.50 no.3 pp. 340-343
Glycine max, Panicum miliaceum subsp. ruderale, Zea mays, buried seeds, corn, field experimentation, seed dispersal, soil, soybeans, spring, weed science
A field experiment was conducted between 1988 and 1993 to determine the number of wild-proso millet seed that could be returned to the soil without increasing future soil seed bank populations. The first seed bank (1988) was 15,300 seed m⁻⁻² and ranged from 14,000 to 21,000 seed m⁻⁻², which represented a high seed population for the area. Seed rain treatments of 0, 3, 6, 12, 24, and 48%% of the 1988 soil seed bank were returned each fall. By 1993, more than 90%% of the original millet seed bank had been depleted for all treatments. It was estimated that 77%% of the seed rain and 68%% of the spring seed bank were lost each year. As a result, wild-proso millet must produce approximately three times the seed in the soil to maintain a constant seed bank population.Nomenclature: Wild-proso millet, Panicum miliaceum L. PANMI; corn, Zea mays L.; soybean, Glycine max (L) Merr.