Flash flaming is a valid seed enhancement for a diverse range of species and seed morphologies

Author:

Ling Elvan1,Masarei Monte1,Guzzomi Andrew L.1,Merritt David J.2,Renton Michael2,Erickson Todd E.3

Affiliation:

1. School of Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia

2. School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia

3. Centre for Engineering Innovation: Agriculture & Ecological Restoration, The University of Western Australia, 1 Underwood Ave, Shenton Park, WA 6008, Australia

Abstract

Flash flaming has shown promise as a seed enhancement technology that improves the handling properties of bulky or irregularly shaped seed material, which in turn benefits logistical and ecological aspects of large-scale direct seeding. To date, only a small number of grass species, that possess similar morphological characteristics, have been tested. This paper describes the application of flash flaming to diaspores (i.e. the dispersal unit comprising the seed and any surrounding or attached tissues) of 19 diverse dryland species from the Amaranthaceae, Asteraceae, Chenopodiaceae and Poaceae critical to ecological restoration in the mining intensive Pilbara region of Western Australia. Flash flaming parameters for each species were tested to identify and maximise volume and mass reduction, reduce particle cohesiveness and maximise flow through a mechanical seeding device, whilst maximising germination. Flaming of all species resulted in reductions in batch volume and mass, and improvements to flow characteristics. For 17 species, flaming either benefited or did not impact on germinability. For two species in the Amaranthaceae, flaming with the settings tested here resulted in a reduction in germinability; however, flaming enabled the diaspores to pass through a mechanical seeding device enabling mechanical distribution which is critical if the species are to be used in large scale restoration.

Publisher

International Seed Testing Association

Subject

Horticulture,Plant Science,Agronomy and Crop Science

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