ITO Toyoaki

SAITO Masanori

SUZUKI Takae

TAJIMA Ryosuke

UNO Toru

English

紀要類（bulletin）Poster Sessionsdepartmental bulletin pape

SUZUKI, Takae

UNO, Toru

TAJIMA, Ryosuke

ITO, Toyoaki

SAITO, Masanori

Tohoku University Repository (TOUR) / 東北大学機関リポジトリ

Optimum Level of Soil Available Phosphorus forAMF Inoculation to Welsh Onion inNon-Allophanic Andosol著者 SUZUKI Takae, UNO Toru, TAJIMA Ryosuke, ITOToyoaki, SAITO Masanorijournal orpublication titleJournal of Integrated Field Sciencevolume 15page range 88-88year 2018-10URL http://hdl.handle.net/10097/0012402988Poster Sessionp13. Optimum Level of Soil Available Phosphorus for AMF Inoculation to Welsh Onion in Non-Allophanic AndosolTakae SUZUKI1, Toru UNO1, Ryosuke TAJIMA1, Toyoaki ITO1 and Masanori SAITO1,21Graduate School of Agricultural Science, Tohoku University  2Japan Science and Technology AgencyIt was demonstrated that inoculation of arbuscular mycorrhizal fungi (AMF) to Welsh onion (Allium fistulosum L.) was effective to improve its growth and to reduce phosphorus (P) fertilizer (Tawaraya et al., 2012). Non-allophanic Andosol is a volcanic soil with high P fixing capacity, so application of AMF is expected for efficient use of P fertilizer. However, it is not yet clarified what level of soil available P is suitable for effective AMF inoculation in non-allophanic Andosols. To clarify the optimum level of soil available P in a non-allophanic Andosol, we conducted field experiments of Welsh onion for 4 years in Field Science Center of Tohoku University, Japan. Welsh Onion was inoculated with a commercial inoculum containing Rhizophagus sp. R10 and grown for about 8 weeks in nursery bed in greenhouse. The seedlings were transplanted to the plots with different levels of soil available P due to previous fertilization. Soil available P of the plots were Very high (VH), High (H), Medium (M), and Low (L). The AMF inoculation significantly increased the yields in the M and H plots, while no effect was found in the VH plot. In the L plot, plant growth was so poor that the inoculation did not clearly improve yields. Additional P fertilizer was applied upon transplanting, but this P fertilization did not much affect the yield of Welsh onion. These results indicate that a medium to high level of soil available P is needed to increase effectiveness of AMF inoculation to Welsh onion in the non-allophanic Andosol.

Optimum Level of Soil Available Phosphorus for AMF Inoculation to Welsh Onion in Non-Allophanic Andosol

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Optimum Level of Soil Available Phosphorus for AMF Inoculation to Welsh Onion in Non-Allophanic Andosol

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