NDLI: Influence of biochar amendment on herb growth in a green roof substrate

Content Provider	Springer Nature Link
Author	Olszewski, Michael W. Eisenman, Sasha W.
Copyright Year	2017
Abstract	The objectives of this research were: 1) to assess the effect of biochar incorporation on the growth of basil (Ocimum basilicum ‘Genovese Compact, Improved’) and peppermint (Mentha × piperita) and, 2) to determine the physical characteristic differences in heat-expanded clay (HEC) substrate following incorporations of biochar at 5%, 10%, or 15% (by volume). A commercially-available green roof substrate, Rooflite Intensive Ag (IA) substrate, was included for comparison. The IA substrate had the highest total porosity (TP), container capacity (CC), and air-filled porosity (AP). The HEC substrate showed a linear increase in TP and CC and a linear decrease in dry bulk density with increasing amounts of biochar. The commercially available IA substrate had the highest water retention (CC = 25.0%). Overall, there was a maximum increase of peppermint shoot dry weight (g/shoot) response in the HEC substrate using 15% biochar. Coverage area measurements indicated that peppermint benefited more than basil from the incorporation of biochar. Biochar alone did not influence stomatal conductance, although basil or peppermint grown in the IA substrate had higher stomatal conductance than plants grown on HEC with all three biochar incorporation rates at 3 and 4 d after irrigation, probably due to the lower aboveground biomass of the IA-grown plants. In conclusion, the addition of biochar amendment to HEC substrate had a minor influence on peppermint growth and no influence on stomatal conductance of either basil or peppermint.
Starting Page	406
Ending Page	413
Page Count	8
File Format	PDF
ISSN	22113452
Journal	Horticulture, Environment, and Biotechnology
Volume Number	58
Issue Number	4
e-ISSN	22113460
Language	English
Publisher	Korean Society for Horticultural Science
Publisher Date	2017-09-21
Publisher Place	Korea
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Breeding/Biotechnology Plant Physiology Agriculture Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture Biotechnology

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