Can Biochar be used as a Seed Coating to Improve Native Plant Germination and Growth in Arid Conditions?
Document Type
Article
Publication Date
2-2016
Department
College of Forest Resources and Environmental Science
Abstract
Direct seeding is a common large-scale restoration practice for revegetating arid and semi-arid lands, but success can be limited by moisture and temperature. Seed coating technologies that use biochar may have the potential to overcome moisture and temperature limitations on native plant germination and growth. Biochar is a popular agronomic tool for improving soil properties, such as water availability and nutrient retention and has been recently marketed, but not tested, as a seed coating. We analyzed the effect of biochar seed coating thicknesses on the germination and growth of four plant species native to western United States: mountain brome (Bromus marginatus), prairie junegrasss (Koeleria cristata), Wyeth's buckwheat (Eriogonum heracleoides), and western yarrow (Achillea millefolium). Across different temperature and water potential treatments using environmental chambers and polyethylene glycol (PEG) solutions, biochar coating applied at different thicknesses had either a neutral or negative effect on germination for all species. In the field, biochar seed coatings slightly improved mountain brome root weight and prairie junegrass cover. Our results, alongside the high economic expense of native plant seed and direct seeding operations, suggest that biochar, by itself, may not be an appropriate seed coating for improving native plant establishment.
Publication Title
Journal of Arid Environments
Recommended Citation
Williams, M.,
Dumroese, R.,
Page-Dumroese, D.,
&
Hardegree, S.
(2016).
Can Biochar be used as a Seed Coating to Improve Native Plant Germination and Growth in Arid Conditions?.
Journal of Arid Environments,
125, 8-15.
http://doi.org/10.1016/j.jaridenv.2015.09.011
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/6606
Publisher's Statement
© 2015 Elsevier Ltd.