Effect of wood pulp medium on root and shoot growth of tartary buckwheat (<i>Fagopyrum tataricum</i> Gaertn.) sprouts

NAKAI Yusuke, WATANABE Shin-ichi

doi:10.3117/rootres.31.90

<p>Microplastics constitutes one of the serious marine environmental problems. In many cases, polyurethane resin, which is a type of plastic, is commonly used as a growth medium in sprout production. Consequently, industrial waste composed of a mixture of polyurethane media and roots would also contribute to marine microplastic pollution. Because of that, it was necessary for us to examine polyurethane resin replacement as a new medium and we focused on recyclable wood pulp medium prepared from lumber. This study aimed to evaluate the growth of roots and shoots of tartary buckwheat (Fagopyrum tataricum Gaertn.) sprouts on a wood pulp medium in a closed plant factory under artificial light. Total root length, longest root length, root length density, specific root length, bleeding sap rate, fresh weight of shoots, hypocotyl length, and fresh and dry weight of roots were significantly greater when grown on wood pulp medium than on polyurethane medium. In addition, wood pulp medium could retain 3.89 times the amount of water compared with polyurethane medium. Furthermore, the three-phase distribution (gas, solid, and liquid phases) of wood pulp medium was improved compared with that of polyurethane medium. Conversely, dry weight of shoots did not differ significantly between wood pulp medium and polyurethane medium conditions. These results suggest that wood pulp medium may promote growth of tartary buckwheat sprouts in a closed plant factory with artificial light.</p>

Effect of wood pulp medium on root and shoot growth of tartary buckwheat (<i>Fagopyrum tataricum</i> Gaertn.) sprouts

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