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Depletion of an Artificial Seed Bank of Palmer Amaranth (Amaranthus palmeri) over Four Years of Burial*

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DOI: 10.4236/ajps.2014.511173    3,894 Downloads   4,720 Views   Citations

ABSTRACT

An artificial seed bank study was conducted at Pendleton, SC, USA, to investigate the persistence of Palmer amaranth seeds buried uniformly across a 10-cm depth in soil inside polyvinyl chloride (PVC) cylindrical pipes over 4 years. The experiment was conducted using a split-plot design, with year as the main plot factor and with or without soil disturbance (shallow tillage to a depth of 10 cm) as the subplot factor. Annual soil disturbance through tillage in the spring stimulated emergence during the first and second year after burial. A total of 0.5% to 0.8% of the seed bank emerged during the 4-yr burial period, and 99% or more of the 4-yr total emergence occurred during the first two years of burial. Seeds retrieved from 0 to 5 cm and 5 to 10 cm depths did not differ in viability. Soil disturbance influenced the decline of the artificial seed bank at least in the first year, with fewer viable seeds remaining in annually-disturbed plots. Regardless of soil disturbance, a small fraction of seeds (0.01% to 0.03% of original seed bank) remained viable in the soil after four years of burial. In conclusion, Palmer amaranth seeds buried across a 10 cm soil depth in the artificial seed bank had low persistence, which implies that burial may aid management of the weed seed bank.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Jha, P. , Norsworthy, J. and Garcia, J. (2014) Depletion of an Artificial Seed Bank of Palmer Amaranth (Amaranthus palmeri) over Four Years of Burial*. American Journal of Plant Sciences, 5, 1599-1606. doi: 10.4236/ajps.2014.511173.

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