Papers - ASAI Toshimitsu
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Assessing the pore size distribution of architectural greening soils and materials for wall greening based on their physical properties Reviewed
ASAI Toshimitsu, FUJIKAWA Tomonori, FUJITA Shigeru, MAKI Takashi, MORII Hiroyuki, SHIRAI Hiroyuki, KANEKO Takanori
Journal of the Japanese Society of Soil Physics 154 ( 0 ) 11 - 18 2023.07
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Soil Physics
Artificial lightweight and porous materials (i.e., architectural greening soils and materials) are often used in the rooftops and wall greening of buildings. It is important for the designers of the system to understand the physical properties of architectural greening soils and materials to save the amount of water and fertilizer used, which directly affects maintenance costs. The aims of this study were to assess the pore size distribution of architectural greening soils and materials for wall greening based on their physical properties. According to water retention measurements, rapid drainage will occur at particular matric potentials for certain architectural greening soils and materials. The pore size distributions of architectural greening soils and materials estimated from water retention curves suggested that the architectural greening soils and materials used in this study can be classified into two groups: (i) materials that include only relatively large pores with diameters from 0.001 to 0.01 cm, (ii) materials also include relatively small pores with diameters from 0.0002 to 0.001 cm. The classification of architectural greening soils and materials by pore size distribution could be affected by their manufacturing processes. The values of saturated hydraulic conductivity of the materials ranged from 10^0 to 10^{-2} cm s^{-1}. Furthermore, hydraulic conductivity tended to increase with total porosity of the architectural greening soils and materials except that whose pores were made by forming.
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Changes in Growth of <i>Egeria densa</i> in Shading Conditions Reviewed
ASAI Toshimitsu, FUJIKAWA Tomonori, TAKEUCHI Yasushi, SUZUKI Shinichi, NAKAMURA Yoshio
Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 90 ( 1 ) I_209 - I_216 2022.06
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering
<p>This study aimed to develop a new method to control <i>Egeria densa</i>, which overgrows in agricultural irrigation canals. We conducted two experiments (one in the laboratory and one in the field), focused on changes in light conditions and the growth of <i>E. densa</i>. In the laboratory experiment, the maximum tensile load of the stems was significantly reduced when the light was shaded to about 20 μmol·m<sup>-2</sup>·s<sup>-1 </sup>(1,400 lx). We discovered that shading exerted a significant negative effect on the number of roots. Furthermore, in the field experiment, which was conducted in an actual agricultural canal, the maximum tensile load on stems was reduced in both the 85-90% and 95-98% shade plots. In particular, in the 95-98% shade plot, the tensile load was reduced to about half of that in the control plot (non-shade) during the high grow season from August to October.</p>
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Evaluating Ion Exchange Capacity of Molten Slag for Hydroponic System "jointly worked" Reviewed International coauthorship International journal
Antonio Perez Fuentes, Sarvesh Maskey, Hiromu Okazawa, Yuri Yamazaki, Tmonori Fujikawa, Toshimitsu Asai
International Journal of Environmental and Rural Development 13 ( 1 ) 143 - 146 2022.06
Language：English Publishing type：Research paper (scientific journal)
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Study on Extermination of <i>Egeria densa</i> by Shading Nets in Agricultural Irrigation Canal Invited Reviewed
ASAI Toshimitsu, FUJIKAWA Tomonori, TAKEUCHI Yasushi, NAKAMURA Yoshio, SUZUKI Shinichi*
Water,Land and Environmental Engineering 88 ( 11 ) 893 - 897,a1 2020.11
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering
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Study on applicability of Phytoremediation techniques for Pb contaminated soil Reviewed
Shiro WAKUI,Toshimitsu ASAI*,Yousuke WATANABE,Akihiko HORIKAWA,Masayo YAMASAKI,Kentaro IIJIMA
Journal of Japanese Society of Turfgrass Science 48 ( 1 ) 17 - 24 2019.10
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
We used Chenopodium album var. centrorubrum, Gossypium arboretum, Festuca araundinacea, Festuca rubra var. genuina. Hack. Poa pratensis and Cynodon dactylon (L.)Pers. cv. `Riviera', which planting and cultivation techniques have been already established, to try phytoremediation of lead in the simulated contaminated soil. Our results found that C. album and G. arboretum increased Pb concentration levels in the plant body over long-term cultivation (115 days and 96 days) rather than short-term cultivation (63 days and 22 days). Furthermore, these tendency was remarkable in G. arboretum. On the other hand, C. album recorded the highest reading for Pb resistance. Additionally, that dry weight was large. We considered the amount-per-pot Pb removed to be the largest in this study. Cool-season turf grasses (F. araundinacea, F. rubra, P. pratensi) had higher leaf Pb concentrations than warm-season grasses (C. dactylon). While those grasses had a plant body smaller than other test plants, their root Pb concentration was very high. Thus, it was revealed that a turf grass Pb removal amount-per-pot can be obtained equivalent to C. album.
*Corresponding author -
Growth response of perennial ryegrass (Lolium perenne L.) under different irradiation time and color temperature of high flux light emitting diode (LED) Lights Reviewed
Satoru TANAKA, Toshimitsu ASAI*, Tomonori KATAOKA, Hiroshi OIKAWA, Yoko KONNO, Chizuko MIZUNIWA, Shimpei TAKAHASHI
Journal of Japanese Society of Turfgrass Science 47 ( 2 ) 11 - 20 2019.03
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
*Corresponding author
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Growth Response of Tifway Bermudagrass (Cynodon dactylon ×C. transvaalensis) under Different Irradiation Time and Color Temperature of High Flax Light Emitting Diodes (LEDs) Lights Reviewed
Toshimitsu ASAI, Satoru TANAKA, Tomonori KATAOKA, Hiroshi OIKAWA, Yoko KONNO, Chizuko MIZUNIWA, Shimpei TAKAHASHI
Journal of Japanese Society of Turfgrass Science 46 ( 2 ) 57 - 64 2017.10
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristics of Air Pollutant Deposition for Hedera helix L. and Three Type Imitation Greens Reviewed
Kenta MACHIDA, Toshimitsu ASAI*, Chizuko MIZUNIWA
The Japanese Society of Revegetation Technology 42 ( 4 ) 550 - 555 2017.05
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
*Corresponding author
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Growth Characteristic and Leaf Color Transition of Three Variegated Cultivars of Euonymus japonicus in the Different Light Conditions Reviewed
Toshimitsu ASAI, Kazuo KAJIMURA, Kentaro IIJIMA
Landscape Research Japan Online 8 58 - 63 2015.08
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
Other Link： https://www.jstage.jst.go.jp/article/jilaonline/8/0/8_58/_pdf
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Uptake of Cesium from Radionuclide Contaminated Soil by Turf Grass Species Reviewed
Qi Ji QIANG,Toshimitsu ASAI,Chizuko MIZUNIWA,Mitsuo KONDO
Journal of Japanese Society of Turfgrass Science 43 ( 2 ) 168 - 171 2015.03
Language：Japanese Publishing type：Research paper (scientific journal)
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Chromium and lead absorption ability and growth reaction of Chenpodium album var.centrorubrum in a metal-contaminated soil
Kazunori YOKOYAMA, Shiro WAKUI, Shuzo TOROBU, Toru YOKOTSUKA, Satoshi NAITO, Toshimitsu ASAI, Kentaro IIJIMA, Shigeo MORINAGA
Research Bulletin, Toin University of Yokohama 30 147 - 153 2014.06
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Chromium and lead absopiton ability and growth reaction of Artemisia indica var.maximowiczii in a metal-contaminated soil
Kazunori YOKOYAMA, Kota KURIYAMA, Muneyuki HONDA, Shiro WAKUI, Shuzo TOROBU, Toru YOKOTSUKA, Satoshi NAITO, Toshimitsu ASAI, Kentaro IIJIMA, Shigeo MORINAGA
Research Bulletin, Toin University of Yokohama 28 243 - 248 2013.06
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Improvement of Reaction to Remove Nitrogen Dioxide by Hedera Genus with Photocatalytic Treatment Reviewed
Riki Aikawa,Toshimitsu Asai,Chizuko Mizuniwa,Mitsuo Kondo
Journal of Jpanese Society of Turfgrass Sciense 41 ( 2 ) 144 - 148 2013.03
Language：Japanese Publishing type：Research paper (scientific journal)
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An experimental research of thermal insulation and storage effect of turf roofs in winter Reviewed
Tian He,Toshimitsu Asai,Mitsuo Kondo
Journal of Japanese Society of Turfgrass Science 40 ( 2 ) 141 - 144 2012.03
Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of Decontamination Capacity of Nitrogen Dioxide for Sedum and Zoysia matrella. in the Chamber Reviewed
Toshimitsu ASAI, Mami TANAKA, Iijima KENTARO, Chizuko MIZUNIWA, Mitsuo KONDO
journal of the Japanese Institute of Landscape Architecture 74 ( 5 ) 399 - 402 2012.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Growth Reaction for Plants Sensor that The Several Plant Planted on Pb Pollution Soil
Yuichi Sugano, Shiro Wakui, Shigeo Morinaga, Toshimitsu Asai, Shuzo Torobu, Susumu Yokotsuka, Satoshi Naito, Kentaro Iijima
Reseatch Bulletin Toin University of Yokohama 24 153 - 158 2011.06
Language：English Publishing type：Research paper (bulletin of university, research institution)
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Evaluation of phytoremediation capability for ipomoeas and heucheras, regarding their nitrogen dioxide gas absorbency. Reviewed
Toshimitsu ASAI,Ayumi KANOTO,Chizuko MIZUNIWA,Mitsuo KONDO
Technical Reports of Landscape Architecture 6 74 - 77 2011.02
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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A Consideration of Simple Determination for Moss Green Insulation form Earthenware Tile Using Muffle Furnace and Burner Reviewed
ASAI Toshimitsu, KAWAMOTO Kumi, KITAMURA Masayuki, OKUDA Nobuyasu, KONDO Mitsuo
Technical Reports of Landscape Architecture 5 90 - 93 2009.02
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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A study of phytoaccumulation for Cd using Perennial ryegrass and Tall fescue Reviewed
ASAI Toshimitsu, SATO Fumi, MIZUNIWA Chizuko, KONDO Mitsuo
Journal of Japanese Society of Turfgrass Science 36 ( 1 ) 20 - 25 2007.10
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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グランドカバープランツのカドミウム吸収能に関する実験的研究
浅井 俊光
東京農業大学(博士論文) 2007.03
Language：Japanese Publishing type：Thesis (other)
アジュガ、キショウブ、ハナショウブ、ペレニアルライグラス，トールフェスクの4種類を供試植物に選定し、形状や特性の違いによるCd吸収能及び耐性を明らかにした。また、キレート剤の施用、土耕と水耕の栽培方式の違い、Cd濃度や実験期間の長短、植物体の大小が吸収能に及ぼす影響、地上（茎葉）部と地下（根）部とのCd重量比（茎葉部/根部）などCd吸収に係わる様々な事象についても言及した。
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The Effective Usage of EDTA on the Phytoaccumulation of Cadmium by Ajuga reptans L. Reviewed
ASAI Toshimitsu, NAGAMINE Ayaka, MIZUNIWA Chizuko, KONDO Mitsuo
Technical Reports of Landscape Architecture 4 116 - 119 2007.02
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of Phytoaccumulation for Cd by Iris Reviewed
ASAI Toshimitsu, MIYAMOTO Rei, MIZUNIWA Chizuko,KONDO Mitsuo
journal of the Japanese Institute of Landscape Architecture 69 ( 5 ) 451 - 454 2006.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of Phytoaccumulation for Cd in Hydroponicaly Cultured by Ajuga reptans L. Reviewed
ASAI Toshimitsu, TAKAHASHI Yoshikazu, MIZUNIWA Chizuko, KONDO Mitsuo
journal of the Japanese Institute of Landscape Architecture 68 ( 5 ) 537 - 540 2005.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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芝草によるカドミウムの吸収除去(Phytoaccumulation)に関する研究
浅井 俊光
東京農業大学（修士論文） 2004.03
Language：Japanese Publishing type：Thesis (other)
ケンタッキー31フェスク、ケンタッキーブルーグラス、バミューダグラス等を供試植物に用い、土壌中のカドミウム（Cd）の吸収除去能力及びCd耐性などについて基礎的な実験データを採取した。さらに、寒地型芝草については我が国の夏季の環境条件を考慮し、高温条件下にてCd吸収能及びCd耐性能、発芽能力を検証する実験を行い、考察を深めた。