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Effects of biochar and litter on water relations of Japanese black pine (Pinus thunbergii) seedlings

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Title: Effects of biochar and litter on water relations of Japanese black pine (Pinus thunbergii) seedlings
Authors: Fujita, Saki Browse this author
Watanabe, Hanami Browse this author
Marozas, Vitas Browse this author
Tamai, Yutaka Browse this author
Satoh, Fuyuki Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Robinia pseudoacacia
xylem water potential
ectomycorrhizal symbiosis
fine roots
Issue Date: 25-Feb-2020
Publisher: Taylor & Francis
Journal Title: Journal of Forest Research
Publisher DOI: 10.1080/13416979.2020.1731071
Abstract: Biochar is gaining increasing attention in the fields of forest rehabilitation, agriculture, etc. For evaluating biochar application to improve the rhizosphere environment of Japanese black pine (Pinus thunbergii) at harsh coastal environments, a pot experiment was carried out with a focus on ectomycorrhizal (ECM) symbiosis and water relations of seedlings. Another characteristic recently observed at coastal forests is the invasion of the locust (Robinia pseudoacacia), which can potentially increase soil nitrogen. In this study, four treatments were examined (biochar addition, litter addition, biochar and litter addition, and no addition [control]) to determine the effects of biochar and/or nitrogen-rich locust (Robinia pseudoacacia) litter application. Although effects of biochar and litter addition were not observed on ECM symbiosis rate and species composition, treatments with biochar addition, maintained xylem water potential (XWP) of needles for up to 2 weeks without irrigation, independent of litter addition. As biochar increased relative fine root biomass (fine root biomass/total root biomass), it can be considered that biochar was able to maintain needle XWP through increasing the relative amount of fine roots that can obtain water. Overall, these findings suggest that biochar application can help to maintain water relations of Japanese black pine by enhancing fine root growth.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Forest Research on 25 Feb 2020, available online:
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小池 孝良

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