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Research Theme 【 display / non-display 】

Research Theme 【 display / non-display 】

• soil organic matter

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Properties and Salinity of Sedimentation Solid Discharged from Aquaculture Tanks for Farmland Application

  YAMAOKA Masaru, NAKAMURA Ichirou, KINJO Kazutoshi, ENDO Masato, YAMASHINA Fumika, YAMAUCHI Chihiro

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering ( The Japanese Society of Irrigation, Drainage and Rural Engineering )  91 ( 2 ) I_149 - I_155   2023 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  <p>The fertilizer components and salinity of sediments (fish feces, leftovers, etc.) collected from aquaculture tanks, where saltwater fish are raised, were investigated for application to farmlands. The sedimentation solids were acidic at pH 4.9, and the C/N ratio was lower than those of cattle manure and swine manure. Total nitrogen and phosphate were higher than those of cattle manure and swine manure, but potassium was much lower than those of cattle manure and swine manure. The content of heavy metals in the sedimentation solids was well below the allowable amount for sludge fertilizer. The sedimentation solids contained high concentrations of chloride (Cl^-) and sodium (Na⁺) ions. The origin of the Cl^- and Na⁺ was thought to be due to seawater in the sedimentation solids. Since commercial compost made from cattle manure contained about 1.82% Cl^- and 0.57% Na⁺ in dry matter, it was considered that the sedimentation solids would not be a problem in application to agricultural land if the Cl^- and Na⁺ contents were similar or lower.</p>

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• Organic carbon stock and composition in 3.5-m core mangrove soils (Trat, Thailand)

  Kida, M; Watanabe, I; Kinjo, K; Kondo, M; Yoshitake, S; Tomotsune, M; Iimura, Y; Umnouysin, S; Suchewaboripont, V; Poungparn, S; Ohtsuka, T; Fujitake, N

  SCIENCE OF THE TOTAL ENVIRONMENT ( Science of the Total Environment )  801   149682   2021.12 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Effects of soil minerals on carbon stability in the mangrove soil of the Oura river, Japan

  Kazutoshi Kinjo, Toshiyuki Ohtsuka

  Humic substances Research   16   1 - 8   2021.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

• Molecular composition and decomposition stages of organic matter in a mangrove mineral soil with time

  Kida, M; Kondo, M; Tomotsune, M; Kinjo, K; Ohtsuka, T; Fujitake, N

  ESTUARINE COASTAL AND SHELF SCIENCE ( Estuarine, Coastal and Shelf Science )  231   2019.12 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Soil carbon stocks and their primary origin at mature mangrove ecosystems in the estuary of Fukido River, Ishigaki Island, southwestern Japan

  Limura, Y; Kinjo, K; Kondo, M; Ohtsuka, T

  SOIL SCIENCE AND PLANT NUTRITION ( Soil Science and Plant Nutrition )  65 ( 5 ) 435 - 443   2019.09 [ Peer Review Accepted ]

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Books 【 display / non-display 】

Books 【 display / non-display 】

• The Soils of Japan

  Ryusuke Hatano, Hitoshi Shinjo, Yusuke Takata(Editor) ( Part: Allotment Writing ,  Kyushu and Okinawa Regions )

  Springer  2021.01

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Effect of intercropping groundnut cultivation on growth and yield of buckwheat in compost application

  Yamashiro miyo, Kinjo kazutoshi, Kitou Makoto

  Abstracts of Meeting of the CSSJ  2017  -  2017 

  CiNii Research

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Scientific Research(B)

  Project Year: 2015.04  -  2018.03 

• Grant-in-Aid for challenging Exploratory Research

  Project Year: 2015.04  -  2017.03 

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2014.04  -  2017.03 

• Grant-in-Aid for challenging Exploratory Research

  Project Year: 2012.04  -  2013.03 

Preferred joint research theme 【 display / non-display 】

Preferred joint research theme 【 display / non-display 】

• Carbon cycle in forest

  Soil Scince

• Improvement of soil

  Soil Scince

• Utilization of waste materials

  Soil Scince